mini CORI-FLOW™ M1x series
Compact Coriolis Mass Flow
Meters/Controllers for Liquids and Gases
Doc. no.: 9.17.050 rev. T Date: 14-06-2023
Instruction Manual
ATTENTION
Please read this document carefully before installing and operating the product.
Not following the guidelines could result in personal injury and/or damage to the equipment.
Keep this document for future reference.
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050T2
Copyright
© 2023 Bronkhorst High-Tech B.V. - All rights reserved.
Bronkhorst® is a registered trademark of Bronkhorst High-Tech B.V.
All other trademarks are the property of their respective owners.
Disclaimer
The illustrations in this document serve to provide general notices regarding correct operation. The illustrations are
simplified representations of the actual situation and may differ from the actual product.
Bronkhorst High-Tech B.V. reserves the right to modify or improve its products and documentation without notice. Prior to
work, check whether a newer version of this document is available on the Bronkhorst website.
Symbols in this document
Important information. Disregarding this information could increase the risk of damage to the equipment, or the risk of
personal injuries.
Tips, useful information, attention points. This will facilitate the use of the instrument and/or contribute to its optimal
performance.
Additional information available in the referenced documentation, on the indicated website(s) or from your Bronkhorst
representative.
Receipt of equipment
Check the outside packaging box for damage incurred during shipment. If the box is damaged, the local carrier must be
notified at once regarding his liability. At the same time a report should be submitted to your Bronkhorst representative.
Carefully remove the equipment from the box. Verify that the contents of the package was not damaged during shipment.
Should the equipment be damaged, the local carrier must be notified at once regarding his liability. At the same time a
report should be submitted to your Bronkhorst representative.
If the product is damaged, it should not be put into service. In that case, contact your Bronkhorst representative for service.
Check the packing list to ensure that you received all items included in the scope of delivery.
Do not discard spare or replacement parts.
See Removal and return instructions for information about return shipment procedures.
Equipment storage
The equipment should be stored in its original package in a climate controlled storage location.
Care should be taken not to subject the equipment to excessive temperatures or humidity.
See technical specifications (data sheet) for information about required storage conditions.
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050T 3
Warranty
Bronkhorst® products are warranted against defects in material and workmanship for a period of three years from the date
of shipment, provided they are used in accordance with the ordering specifications and not subject to abuse or physical
damage. Products that do not operate properly during this period may be repaired or replaced at no charge. Repairs are
normally warranted for one year or the balance of the original warranty, whichever is the longer.
See also section 9 (Guarantee) of the Conditions of sales:
www.bronkhorst.com/int/about/conditions-of-sales/
The warranty includes all initial and latent defects, random failures, and indeterminable internal causes. It excludes failures
and damage caused by the customer, such as contamination, improper electrical hook-up, physical shock etc.
Re-conditioning of products primarily returned for warranty service that is partly or wholly judged non-warranty may be
charged for.
Bronkhorst High-Tech B.V. or affiliated company prepays outgoing freight charges when any part of the service is
performed under warranty, unless otherwise agreed upon beforehand. The costs of unstamped returns are added to the
repair invoice. Import and/or export charges as well as costs of foreign shipping methods and/or carriers are paid by the
customer.
General safety precautions
This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety
precautions required to prevent possible injury. Read the operating information carefully before using the product.
Before operating, make sure the line cord is connected to a properly grounded power receptacle. Inspect the connecting
cables for cracks or breaks before each use.
The equipment and accessories must be used in accordance with their specifications and operating instructions, otherwise
the safety of the equipment may be impaired.
Opening the equipment is not allowed. There are no user serviceable parts inside. In case of a defect please return the
equipment to Bronkhorst High-Tech B.V.
One or more warning signs may be attached to the product. These signs have the following meaning:
General warning; consult the instruction manual for handling instructions
Surface may get hot during operation
Shock hazard; electrical parts inside
To maintain protection from electric shock and fire, replacement components must be obtained from Bronkhorst. Standard
fuses, with applicable national safety approvals, may be used if the rating and type are the same. Non-safety related
components may be obtained from other suppliers, as long as they are equivalent to the original component. Selected parts
should be obtained only through Bronkhorst, to maintain accuracy and functionality of the product. If you are unsure
about the suitability of a replacement component, contact your Bronkhorst representative for information.
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050T4
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050T 5
Table of contents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Introduction 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.1 Scope of this manual
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.2 Intended use
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.3 Product description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81.4 Product overview
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.5 Calibration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.6 Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.7 Documentation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101.8 Model key
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Installation 2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112.1 Functional properties
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112.2 Operating conditions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112.3 Mounting
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Orientation 2.3.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Location in fluid system 2.3.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Mechanical isolation 2.3.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Piping requirements 2.3.4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Fluid connections 2.3.5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.4 Preventing pressure shocks
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.5 Preventing hydraulic shocks
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142.6 Electrical connection
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Analog or local connection 2.6.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Digital RS-232 connection 2.6.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Digital RS-485 connection (fieldbus) 2.6.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16FLOW-BUS 2.6.3.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Modbus 2.6.3.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16PROFIBUS DP 2.6.3.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16DeviceNet™ 2.6.3.4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Operation 3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173.1 Powering up
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173.2 First use
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173.3 Preventing slug flow
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173.4 After use
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173.5 Powering down
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183.6 Valve Safe State
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183.7 Temperature considerations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193.8 Manual controls
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19LED indications 3.8.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Multifunctional switch 3.8.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Normal operating functions 3.8.2.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Power-up functions 3.8.2.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Control mode - readout/change 3.8.2.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Network settings - readout/change 3.8.2.4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Disabling multifunctional switch 3.8.2.5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233.9 Communication modes
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Analog operation 3.9.1
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Instruction Manual mini CORI-FLOW™ M1x 9.17.050T6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Digital RS-232 operation 3.9.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24FlowDDE 3.9.2.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Software (DDE applications) 3.9.2.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Fieldbus operation 3.9.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263.10 Adjusting zero point
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Manual procedure 3.10.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Digital procedure 3.10.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273.11 Checking calibration status
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Digital parameters 4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304.1 Measurement and control
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Advanced measurement and control 4.1.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324.2 Alarms
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344.3 Counter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354.4 Network configuration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 374.5 Fluid set
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38Advanced fluid set parameters 4.5.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 394.6 Controller
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404.7 Master/slave configuration (FLOW-BUS)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 414.8 Device identification
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 424.9 Special parameters
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43Default control mode 4.9.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Troubleshooting and service 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 455.1 Errors and warnings
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 455.2 Restoring factory settings
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 455.3 Common issues
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 485.4 Service
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Returns 6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 496.1 Removal and return instructions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 496.2 Disposal (end of lifetime)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Parameter index
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050T 7
1 Introduction
1.1 Scope of this manual
This manual contains general product information, installation and operating instructions and troubleshooting tips for the
mini CORI-FLOW™ M1x series mass flow meters and controllers for liquids and gases.
1.2 Intended use
The Bronkhorst® mini CORI-FLOW™ M1x is an accurate mass-flow meter/controller for measuring and controlling gas and
liquid flows at pressures up to 200 bar(a), virtually independent of pressure and temperature changes. A wide range of
liquids and gases can be measured independent of fluid density, temperature and viscosity.
The wetted materials incorporated in the mini CORI-FLOW™ M1x are compatible with media and conditions (e.g.
pressure, temperature) as specified at ordering time. If you are planning to use the product (including any third party
components supplied by Bronkhorst, such as pumps or valves) with other media and/or other conditions, always check the
wetted materials (including seals) for compatibility. See the technical specifications of the product and consult third party
documentation (if applicable) to check the incorporated materials.
Responsibility for the use of the equipment with regard to its intended use, suitability for the intended application, cleaning
and compatibility of process media with the applied materials lies solely with the user.
The user is responsible for taking the necessary safety measures to prevent damage and/or injury while working with the
equipment and process media (as described in the associated Material Safety Data Sheets).
Where appropriate, this document recommends or prescribes safety measures to be taken with respect to media usage or
working with the described equipment under the specified conditions. However, this does not relieve the user of
aforementioned responsibility, not even if such is not explicitly recommended or prescribed in this document.
Bronkhorst High-Tech B.V. cannot be held liable for any damage and/or injury resulting from unintended, improper or
unsafe use, or use with other media and/or under other process conditions than specified at ordering time.
1.3 Product description
mini CORI-FLOW™ M1x instruments are precise and compact mass flow meters and controllers for liquids and gases, based
on the Coriolis measuring principle. Designed to cover the needs of the low flow market, there are 4 models, supporting
flow ranges from 5 g/h up to 300 kg/h (full scale values), each offering multi-range functionality: factory calibrated
measuring ranges can be re-scaled by the user, without affecting the original accuracy specifications. The instruments are
built into a robust, weatherproof housing, with a high ingress protection rating.
The mini CORI-FLOW measures real mass flow, regardless of the media properties. The system can be complemented with a
(modular or integrated) control valve or a pump and a readout and control unit to measure and control gas and liquid
flows.
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050T8
Measuring principle
Instruments of the mini CORI-FLOW series contain a uniquely shaped, single loop sensor tube, forming part of an
oscillating system. When a fluid flows through the tube, the Coriolis force causes a phase shift, which is detected by sensors
and fed into the integrated printed circuit board. The resulting output signal is proportional to the real mass flow rate,
independent of fluid density, temperature, viscosity, pressure, heat capacity or conductivity. Coriolis mass flow
measurement is fast, accurate and inherently bi-directional. The mini CORI-FLOW™ M1x features density and temperature of
the fluid as secondary outputs.
Multi-range
The mini CORI-FLOW offers multi-range functionality: factory calibrated ranges can be re-ranged to a different full scale
measuring range (e..g. a mini CORI-FLOW model M13 can be used for full scale ranges between 50 g/h and 2000 g/h). The
analog output and the digital measured value are scaled accordingly.
Switching between ranges can be done via the RS-232 interface or the fieldbus interface, or with a Bronkhorst® readout and
control unit (E-8000, BRIGHT). For RS-232 communication, Bronkhorst can offer a special T-part RS-232 cable to connect the
instrument with a Windows computer, together with free tooling software (FlowPlot). Contact your Bronkhorst
representative for more information.
The instrument comes with a calibration certificate for all supported full scale ranges. The actual full scale of the instrument
is set to a value as ordered and can be found on the instrument label.
Accuracy
The accuracy of a mini CORI-FLOW series instrument is either 0.2% reading for liquids or 0.5% reading for gases, based on
mass flow (e.g. g/h, kg/h, etc.). Using the instrument for measuring volume flows (e.g. l/h, ml/min) will introduce an
additional inaccuracy, based on the actual density measured by the instrument.
1.4 Product overview
1. Fluid inlet (fitting type may differ, depending
on ordering details)
2. Manual control interface
3. Fieldbus connection (optional)
4. Power supply/analog interface/RS-232
connector
5. Actuator output (optional)
6. Fluid outlet
7. Mounting holes
T. Transportation bolts (model M15 only)
Transportation bolts - important notes:
Upon delivery, the moving parts of the M15 are immobilized with 2 transportation bolts, to prevent damage to the
sensor during transportation and handling.
Before installing the M15, the transportation bolts must be removed.
Carefully follow the instructions on the leaflet that is attached to the M15.
Do not discard the transportation bolts, but keep them for future use.
Before transporting the equipment, (e.g. for relocation or servicing), the transportation bolts must be re-installed.
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050T 9
1.5 Calibration
The mini CORI-FLOW has been factory calibrated. Periodical inspection, recalibration or verification of the accuracy may be
subject to individual requirements of the user. Whenever necessary, contact your Bronkhorst representative for information
and/or making arrangements for recalibration.
Bronkhorst certifies that the instrument meets the rated accuracy. Calibration has been performed using measurement
standards traceable to the Dutch Metrology Institute (VSL).
Unless specified otherwise, mini CORI-FLOW™ M1x instruments are H
2
0 calibrated.
1.6 Maintenance
Inexpertly servicing instruments can lead to serious personal injury and/or damage to the instrument or the system it is
used in. Servicing must therefore be performed by trained and qualified personnel. Contact your Bronkhorst representative
for information about cleaning and calibration. Bronkhorst has trained staff available.
The mini CORI-FLOW needs no regular maintenance if operated properly, with clean media, compatible with the wetted
materials, avoiding pressure and thermal shocks and vibrations.
The instrument's fluid path (the wetted parts) may be purged with a clean, dry and inert gas or flushed with a non-
aggressive and non-corrosive cleaning liquid.
In case of severe contamination, cleaning the the wetted parts may be necessary.
1.7 Documentation
The mini CORI-FLOW comes with all necessary documentation for basic operation and maintenance. Some parts of this
manual refer to other documents, most of which can be downloaded from the Bronkhorst website.
The documentation listed in the following table is available on the mini CORI-FLOW product pages under
www.bronkhorst.com/products
Type
Document name
Document no.
Manuals
Instruction Manual mini CORI-FLOW™ M1x (this document)
9.17.050
Quick Installation Guide mini CORI-FLOW
9.17.052
Technical documentation
Hook-up diagram Analog/RS-232
9.16.044
Hook-up diagram DeviceNet™
9.16.050
Hook-up diagram FLOW-BUS
9.16.048
Hook-up diagram Modbus
9.16.066
Hook-up diagram PROFIBUS DP
9.16.049
Dimensional drawings
model specific
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050T10
The documentation listed in the following table can be downloaded from www.bronkhorst.com/downloads/
Type
Document
Document no.
General documentation
EU Declaration of Conformity
9.06.059
Manuals
Manual DeviceNet™ interface
9.17.026
Manual EtherCAT® interface
9.17.063
Manual FLOW-BUS interface
9.17.024
Manual Modbus interface
9.17.035
Manual PROFIBUS DP interface
9.17.025
Manual PROFINET interface
9.17.095
Manual RS-232 interface
9.17.027
1.8 Model key
The model key on the product label contains information about the technical properties of the instrument as ordered. The
specific properties can be retrieved with the diagram below.
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050T 11
2 Installation
2.1 Functional properties
Before installing the mini CORI-FLOW, check the serial number label on the instrument to see if the
functional properties match your requirements:
Flow rate
Media to be used in the instrument
Upstream and downstream pressure(s)
Operating temperature
Valve type (if applicable; N.O. = Normally Open, N.C. = Normally Closed)
Technical properties (see Model key)
2.2 Operating conditions
Test pressure
Bronkhorst® instruments are pressure tested to at least 1.5 times the specified operating pressure and
outboard leak tested to at least 2 * 10
-9
mbar l/s Helium.
The test pressure is stated on a red label on the device; if this label is missing or if the test pressure is insufficient, the
device must not be used and should be returned to the factory.
Before installation, make sure that the pressure rating is within the limits of the normal process conditions and that the
tested pressure is in accordance with the safety factor of your application.
Disassembling and/or replacing fluid system related parts of the device will invalidate the test pressure and leak test
specification.
Sealing material compatibility
mini CORI-FLOW instruments with an integrated control valve are fitted with specific sealing material(s), compatible with
the media specified at ordering time. Be sure that the sealing materials are compatible with the media and conditions used
in the system. Bronkhorst High-Tech B.V. cannot be held responsible for any damage resulting from the use of other media
and/or conditions than specified on the purchase order.
2.3 Mounting
Use the mounting holes in the bottom of the instrument base (see product overview) to fixate the instrument to a firm,
rigid base or heavy, vibration free mass, such as a wall, a heavy rig or another stable construction. If such a facility is not
available, use a mass block as a mounting base (see Mechanical isolation).
Check the dimensional drawing for the exact locations and size of the mounting holes.
2.3.1 Orientation
Reliability is generally not affected by the mounting orientation.
2.3.2 Location in fluid system
For gas applications: if there is a chance of condensation or if the gas stream can contain solid particles, it is advisable not
to mount the instrument at the lowest point of a pipe segment. In more general terms, mount the instrument in a location
where condensate or particles (if any) cannot accumulate inside the instrument's media conduits.
In liquid applications, the presence of gas bubbles in the liquid can cause
measurement errors. If there is a risk of expansion of dissolved gas in the
metered liquid, the instrument should be mounted in a pipe segment
where gas bubbles cannot accumulate. The image to the right shows the
preferable mounting locations.
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050T12
The best location is a horizontal pipe segment or a segment where the fluid direction is upward.
Gas might accumulate in a horizontal segment if it is followed by a downward segment. Do NOT mount the
instrument in a location like this.
Mounting in a downward pipe segment with an open end is strongly dissuaded, especially if the pipe
diameter is 1/2" or more. Gravity might cause the segment to drain; depending on the system dimensions
and the viscosity of the metered fluid, this effect might be stronger or weaker.
If the instrument is part of a closed fluid system, mounting the instrument in a downward pipe segment is
not preferable, but may be considered if other mounting locations are more problematic.
To minimize the risk of gas entrapment by cavitation, the preferred location to install a control valve is downstream from
the instrument, for a pump the preferred location is upstream.
2.3.3 Mechanical isolation
Prevent vibrations from the environment and comprising system from being transferred to the instrument, by
mechanically isolating instruments from each other and their surroundings. Consider the following measures:
Mount the instrument on a mass block supported by shock absorbing pads.
o Provide sufficient space around the instrument and the mass block to allow free movement on the shock absorbers.
o Do not attach additional objects to a mass block if not necessary.
o Mass blocks and shock absorbers can be obtained at your Bronkhorst representative.
If possible, use flexible tubing and cabling to connect the instrument to the system.
Apply bends or so-called 'pig tails' in piping/tubing and cabling.
Do not bundle cables (bundled cables are more rigid).
Preventing resonance
If mounted to the same structure,
vibrations from one instrument might
interfere with the resonance frequency of
another instrument.
To minimize resonance, mount instruments
on individual mass blocks. Preferably,
mount multiple instruments parallel to
each other.
2.3.4 Piping requirements
Use piping or tubing that is suitable for the operating conditions of the application (media, maximum temperature,
maximum operating pressure).
Do not install small diameter piping/tubing on high flow rates and avoid abrupt angles or other disturbances within a
distance of 10 times the (inside) pipe diameter from the inlet or outlet of the device.
Do not install pressure regulators within a distance of 25 times the (inside) pipe diameter from a controlling instrument.
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050T 13
2.3.5 Fluid connections
Flow direction
Install the mini CORI-FLOW in the process line, in accordance with the direction of the FLOW arrow on the
instrument base.
Tighten connections according to the instructions of the supplier of the fittings.
Fittings
Typically, Bronkhorst® mini CORI-FLOW meters/controllers are fitted with compression or face-seal-fittings.
For leak tight installation of compression type fittings, make sure that the tube is inserted to the shoulder in the fitting
body and tube, ferrules and fittings are free of dirt or other particles. Tighten the nut finger-tight while holding the
instrument, then tighten the nut 1 turn.
If applicable follow the guidelines of the supplier of the fittings. Special fitting types are available on request.
Make sure that the instrument is not suspended by the piping.
Check the fluid system for leak tightness after any modification and before applying full operating pressure, especially when
using hazardous media (e.g. toxic or flammable).
After using the mini CORI-FLOW for the first time with low temperature media, re-tighten the fluid connections, in order to
prevent leakage.
2.4 Preventing pressure shocks
mini CORI-FLOW instruments can handle pressure shocks in the system well, but are not insensitive to pressure
fluctuations. For optimal control stability, observe the following guidelines:
Provide a stable (pressure controlled) upstream pressure; put sufficient buffer volume between a pressure regulator and
the instrument. As a rule of thumb, install pressure regulators at a distance of at least 25 times the pipe diameter from
the inlet or outlet of the instrument.
When using multiple instruments and/or control valves, prevent interference by putting piping with sufficient buffer
volume between components.
Avoid installing multiple instruments or control valves in close proximity to another.
2.5 Preventing hydraulic shocks
In a fluid system where fluid movement (liquid or gas) is forced to stop or start suddenly (by a pump or a shut-off valve), a
hydraulic shock (or fluid hammer) can occur, especially if the fluid velocity is high. This momentum change causes a
pressure surge (spike) moving back and forth between the ends of the pipe. Rapid pressure fluctuations like this can cause
leakage and damage to fluid lines and components, and ultimately damage to the instrument.
The following measures can be taken to prevent or minimize hydraulic shocks:
Avoid abrupt fluid acceleration and deceleration.
o Avoid large pipe diameter transitions by using piping and tubing with an inside diameter that matches that of the
instrument as closely as possible.
o Keep the fluid velocity through the instrument as low as possible.
Install an accumulator to dampen acceleration and deceleration of the fluid flow.
Consult your Bronkhorst representative if you need more information about prevention of hydraulic shocks.
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050T14
2.6 Electrical connection
Electrical connections must be made with standard cables or according to the applicable hook-up diagrams. Make sure that
the power supply is suitable for the power ratings as indicated on the serial number label (see model key), and that double
or reinforced insulation is used for the power supply cabling. For use in fieldbus systems, follow the instructions of the
cable supplier for the specific fieldbus system.
In order to be able to comply with all applicable guidelines and regulations, it is essential that electrical connections be
made by or under supervision of a qualified electrician.
The equipment described in this document contains electronic components that are susceptible to electrostatic
discharge.
When working on the electrical installation, take appropriate measures to prevent damage as a result of electrostatic
discharge.
The CE mark on the equipment indicates that it complies with requirements imposed by the European Union, including
electromagnetic compatibility (EMC).
EMC can only be guaranteed by applying appropriate cables and connectors or gland assemblies:
Cable wire diameters must be sufficient to carry the supply current and minimize voltage loss.
When connecting the product to other devices, ensure that the integrity of the shielding remains uncompromised; use
shielded cables and connectors where possible and/or required.
Preferably use the supplied cables (if applicable) to make electrical (signal) connections to and between the supplied
components. These cables are shielded, have the required wire diameter, and loose ends (if applicable) are marked to
facilitate correct connection.
If not all requirements for proper shielding can be met (for example, because a component is not equipped with shielded
connectors), take the following measures to ensure the best possible shielding:
Keep cable lengths at a minimum.
Route cables as closely as possible alongside metal structures or components.
Ensure all electrical components are grounded to earth.
When in doubt about the shielding of your cabling and/or electrical connections, contact your Bronkhorst representative.
Never power the instrument simultaneously from two different power sources (e.g. fieldbus and Plug-in Power Supply).
Doing so will irreversibly damage the printed circuit board and the instrument will have to be repaired before it can be
used.
Always turn off electrical power before connecting or disconnecting equipment electrically.
2.6.1 Analog or local connection
Connect the mini CORI-FLOW to the power supply/readout unit using a
cable with an 8-pin female connector on the instrument side. Refer to the
hook-up diagram for analog operation to connect the required signals.
For controllers, the control valve or pump is typically powered separately
via the actuator output.
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050T 15
2.6.2 Digital RS-232 connection
Using a special T-part RS-232 cable, the 8-pin DIN connector of the
instrument can be connected to a COM port or a USB port (via an RS-
232/USB converter) of a Windows computer. Power can be supplied by a
Plug-in Power Supply (PiPS) or via the optional fieldbus connection
(FLOW-BUS, Modbus, DeviceNet™).
Alternatively, connect the instrument to a Bronkhorst® readout and
control unit (BRIGHT/E-8000). In this case, the instrument can also be
powered through the readout and control unit. With the display interface
and control buttons most digital parameters and functions can be used.
For RS-232 communication with a third party micro controller device (e.g. a PLC, refer to the hook-up diagram for RS-232
operation to connect the required signals).
2.6.3 Digital RS-485 connection (fieldbus)
If the instrument is provided with a dedicated fieldbus interface, it can be
operated digitally in a fieldbus system, using RS-485 communication. In
FLOW-BUS, Modbus and DeviceNet™ systems, the fieldbus connector (5-
pin M12) can also be used to power the instrument. In PROFIBUS DP
systems, the instrument is always powered through the 8-pin DIN power
connector.
Never power the instrument simultaneously from two different power sources (e.g. fieldbus and Plug-in Power Supply).
Doing so will irreversibly damage the printed circuit board and the instrument will have to be repaired before it can be
used.
Always check the total power consumption of your instruments before connecting them to a fieldbus system. Do not exceed
the maximum power of the power supply unit.
If you need assistance with setting up a fieldbus configuration, contact your Bronkhorst representative for information.
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050T16
2.6.3.1 FLOW-BUS
FLOW-BUS is a Bronkhorst® designed fieldbus, based on RS-485 technology, for digital communication between devices,
offering the possibility of host-control by a Windows computer.
Characteristics:
Baud rate 187500 (default) or 400000 Baud
+15…24 Vdc supply voltage
Easy installation and communication with other Bronkhorst® devices
Automatic node search and bus optimization (gap fixing)
RS-232 communication (ProPar) with Windows computer (local host)
Connection of up to 120 instruments on a single bus
Maximum bus length: 600 m
Consult Instruction manual FLOW-BUS interface (document no. 9.17.024) for more information about setting up a
FLOW-BUS network.
Power the instruments in a FLOW-BUS local-host system by hooking-up the power supply directly on the FLOW-BUS line
and not by powering a set of instruments through the 8-pin DIN connector on one of the digital instruments.
2.6.3.2 Modbus
Modbus is a 3-wire, RS-485-based fieldbus communication system for parameter value exchange. In this system each
instrument/device is equipped with a micro-controller for its own dedicated task. The instrument behaves as a slave, which
means all communication (instructions and readout) is initiated by a master device on the Modbus system.
Characteristics:
Baud rate selectable between 9600 and 256000 Baud (default: 19200 Baud)
+15…24 Vdc supply voltage
Connection of up to 247 instruments on a single bus
Supports RTU and ASCII protocols
Consult Instruction manual Modbus interface (document no. 9.17.035) for more information about setting up a
Modbus network.
Detailed information about Modbus can be found at www.modbus.org/ or any website of the (local) Modbus
organization of your country (if available).
2.6.3.3 PROFIBUS DP
PROFIBUS DP is a 2-wire, RS-485-based industrial data communication standard (fieldbus) which allows automation
components (e.g. sensors, actuators and controllers) to exchange information.
Consult Instruction manual PROFIBUS DP interface (document no. 9.17.025) for more information about setting up a
PROFIBUS DP network.
2.6.3.4 DeviceNet™
The DeviceNet™ interface offers a direct connection to a DeviceNet™ network, according to the mass flow controller profile
specified by the ODVA. The Bronkhorst® DeviceNet™ instrument is a Group 2 Only Server device whose messages comply
with the Controlled Area Network (CAN) 2.0A standard and with the DeviceNet™ protocol.
Consult Instruction manual DeviceNet™ interface (document no. 9.17.026) for more information about setting up a
DeviceNet™ network.
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Instruction Manual mini CORI-FLOW™ M1x9.17.050T 17
3 Operation
After correct installation of the mini CORI-FLOW™ M1x Mass Flow Meter (MFM) or Mass Flow Controller (MFC), and when all
safety precautions have been taken into account, the instrument can be used for measuring/ controlling the required flow
rate in the system.
3.1 Powering up
To maintain control of the fluid system and ensure a safe situation, it is recommended to turn on power before applying
fluid pressure and to switch off power only after the fluid system is depressurized.
When pressurizing, prevent pressure shocks by gradually bringing the fluid system to the required operating pressure.
For best performance, allow the device to warm up and stabilize for at least 30 minutes before starting measurement
and/or control. This may be done with or without media flow.
When powering up, the instrument needs a couple of seconds to start up the electronics and perform a self-test. After
successful initialization, the green LED will glow continuously to indicate that the instrument is ready to use.
After powering up, the control valve will act according the last known setpoint. When setpoint is 0, this means the valve
closes (normally open) or stays closed (normally closed). The valve stays closed until the instrument receives a new valid
setpoint from the active setpoint source.
3.2 First use
Despite the fact that everything necessary has been done to ensure the cleanliness of the product upon delivery, the
presence of some remaining contamination cannot be ruled out completely.
In order to prevent undesired reactions, purging the mini CORI-FLOW for a minimum of 30 minutes with a dry, inert gas
(like Nitrogen or Argon) is recommended before first use. In systems for use with corrosive or reactive media, this is even
absolutely necessary.
During the manufacturing process, the instrument has been tested with water. Purging prior to first use is also
recommended to remove any remaining water droplets.
The very first time the instrument is used, adjusting the zero point is recommended. See Adjusting zero point for
background information and instructions.
3.3 Preventing slug flow
Reliable measurement results can only be obtained if the fluid flows through the instrument in a single state (either gas or
liquid). The following measures can help prevent so called 'slug flow' (two-phase flow):
Before starting measurement and control:
for liquid applications, remove (dissolved) gas from the system, by flushing the instrument and all fluid lines with the
process fluid at a high flow rate.
for gas applications, remove condensation from the system, by purging the instrument and all fluid lines with a dry gas
at a high flow rate.
During measurement and control:
avoid external heating or cooling (can cause gas bubbles in liquid or condensation of gas).
avoid extreme pressure fluctuations (can cause cavitation in liquid or condensation of gas).
3.4 After use
Depending on the properties of the process medium and the (expected) time until the next use, it is advisable to flush the
fluid system with a suitable (cleaning) fluid after use.
If the equipment has been used to process corrosive, reactive or hazardous media (e.g. toxic or flammable), cleaning the
fluid system is imperative before it is exposed to air.
If the equipment is not used for an extended period, the fluid system should be dry after use and after cleaning. If not, it
should be purged with a dry, inert gas for a minimum period of 30 minutes.
3.5 Powering down
Prior to powering down the mini CORI-FLOW, the fluid system should be depressurized.
When depressurizing, prevent sudden pressure changes, by shutting off the fluid supply gradually.
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Instruction Manual mini CORI-FLOW™ M1x 9.17.050T18
3.6 Valve Safe State
When a controlling instrument is not powered or cannot communicate with the fieldbus network (if applicable), all electrical
valves operated by the instrument (whether integrated or external) automatically return to their default state. The default
state is closed for 'normally closed' valves (n/c) and fully open for 'normally open' valves (n/o).
Check the serial number label or the technical specifications to see which valve type is used on your instrument (if
applicable).
3.7 Temperature considerations
Although the mini CORI-FLOW has excellent temperature stability, the best accuracy is achieved when temperature
gradients within and across the instrument are avoided. Take the following guidelines into account:
To avoid simultaneous heating and cooling of different parts of the instrument, make sure the ambient temperature is
as stable and evenly distributed across the environment as possible.
Avoid temperature shocks; heating or cooling should amount to no more than 1 °C per second.
Make sure that the media temperature matches the ambient temperature as closely as possible.
The mini CORI-FLOW will show an amount of self heating, due to power dissipation of the electronics. This effect can be
as large as approximately 15 °C (depending on media and ambient temperature). In practice, there will be a balance
between media temperature, self heating and ambient temperature.
Operation in a cool environment can compensate somewhat for the effect of high media temperatures.
Heating and cooling effects will also depend on the cooling/heat conducting capacities of the installation itself on which
the instrument is mounted.
To prevent damage to the electronics, make sure the temperature in the housing never exceeds 70°C. To monitor this,
the internal temperature reading can be used (parameter Temperature).
The storage temperature should lie between -30 and 80 °C. Make sure the measuring tube is purged and dry before
storing the instrument.
Temperature build-up
The temperature in the instrument housing is largely determined by the media temperature (T fluid) and the ambient
temperature (T ambient). Although these temperatures cannot simply be added up to calculate the internal temperature,
they do amplify each other. Taking the self heating effect of the electronics into account, some rules of thumb can be
defined for the maximum temperatures and their sum to observe. The graph below illustrates these; the area below each
line represents the safe temperatures for the according instruments or circumstances.
The following rules can be inferred from this graph:
With normal, continuous operation:
M12, M13: T fluid + T ambient should remain lower than 110 °C
M14, M15: T fluid + T ambient should remain lower than 100 °C
T fluid should lie between 0 and 100 °C
T ambient should lie between 0 and 55 °C
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Instruction Manual mini CORI-FLOW™ M1x9.17.050T 19
When cleaning (without electrical power to the instrument):
T fluid + T ambient should remain lower than 130°C
T fluid should lie between 0 and 130 °C
T ambient should lie between 0 and 80 °C
3.8 Manual controls
The instrument is equipped with two LEDs and a push button switch, which can be used to
monitor the instrument visually and start several functions manually.
3.8.1 LED indications
Mode/MOD
Operational mode
Error/NET
Error/warning indication
The tables below list the different LED indications:
Green
Pattern
Time
Indication
off
continuous
Power-off
on
continuous
Normal operation mode
short flash
0.1 sec on,
2 sec off
Initialization mode
blink
0.2 sec on,
0.2 sec off
Special function mode; the instrument is busy performing a special function (e.g.
auto-zero or self-test)
long flash
2 sec on,
0.1 sec off
DeviceNet™
Idle state
Other protocols
n/a
Red
Pattern
Time
Indication
on
continuous
Liquid application: measuring error (no liquid in measuring tube); flush instrument
to remove gas
OR Critical error; the instrument needs servicing before it can be used
short flash
0.1 sec on,
2 sec off
FLOW-BUS
Node occupied: re-install instrument
PROFIBUS DP
No data exchange between master and slave (automatic recovery)
Modbus
Data is being received or transmitted
DeviceNet™
Minor communication error
blink
0.2 sec on,
0.2 sec off
FLOW-BUS
Waiting for communication, check communication settings of all
FLOW-BUS devices in the fieldbus setup. Usually the ‘last node
address’ setting of one of the devices is incorrect.
DeviceNet™
No bus power
Other protocols
n/a
long flash
2 sec on,
0.1 sec off
PROFIBUS DP
Requested parameter not available
DeviceNet™
Serious communication error; manual intervention needed
Other protocols
n/a
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Instruction Manual mini CORI-FLOW™ M1x 9.17.050T20
Green and red (alternating)
Pattern
Time
Indication
slow wink
1 sec on,
1 sec off
Alarm indication; minimum/maximum alarm, power-up alarm, limit reached or batch
size reached
normal wink
0.2 sec on,
0.2 sec off
Wink mode; by sending a command to the Wink parameter, the instrument flashes its
LEDs, so that it can be located in the physical setup
fast wink
0.1 sec on,
0.1 sec off
Selected action started (after releasing the multifunctional switch)
3.8.2 Multifunctional switch
Some special instrument functions can be started manually using the multifunctional switch near the indication LEDs. These
functions are available in analog as well as in digital operation mode.
3.8.2.1 Normal operating functions
In order to access these functions, press and hold the switch while the instrument is in normal operation mode (green
LED lit continuously).
As long as the switch is held, the LEDs show a repeating sequence of patterns, where each pattern indicates a function.
All patterns in this sequence are continuous.
Each pattern is shown for a number of seconds; in the table below, the column labeled Hold time indicates the time frame
during which a pattern is shown.
To start the required function, release the switch when the LEDs show the associated pattern.
(green)
(red)
Hold time
Function
off
off
0…1 sec
No action
off
off
1…4 sec
1. In case of a min/max alarm: reset alarm
2. FLOW-BUS: Auto-install to bus - lets instrument obtain free node address
Note: min/max alarm (if any) has to be reset before auto install can be performed.
off
on
4…8 sec
Reset instrument; clear all warnings and error messages and restart the instrument
on
off
8…12 sec
Auto-zero; re-adjust the zero-point of the instrument (flow meters/controllers only)
on
on
12…16 sec
Enable FLASH mode for firmware update:
the instrument shuts down and both LEDs are switched off
at the next power-up, the instrument will be active again
See Adjusting zero point for background information and instructions on how to adjust the zero point of an instrument.
Do not adjust the zero point before having taken notice of the instructions.
3.8.2.2 Power-up functions
In order to access these functions, press and hold the switch while powering up the instrument.
As long as the switch is held, the LEDs show a repeating sequence of patterns, where each pattern indicates a function.
All patterns in this sequence are flashing (0.2 sec on, 0.2 sec off).
Each pattern is shown for a number of seconds; in the table below, the column labeled Hold time indicates the time frame
within the sequence during which a pattern is shown.
To start the required function, release the switch when the LEDs show the associated pattern.
(green)
(red)
Hold time
Function
off
off
0…4 sec
No action
off
on
4…8 sec
Restore factory settings (except communication settings)
on
off
8…12 sec
FLOW-BUS: auto install to bus; let the instrument obtain a free node address from
the FLOW-BUS system
Other protocols: no action
on
on
12…16 sec
Set default node address (see Network configuration)
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Instruction Manual mini CORI-FLOW™ M1x9.17.050T 21
3.8.2.3 Control mode - readout/change
Reading control mode
By briefly pressing the switch 2 times within 1 second in normal operation mode, the instrument shows its current
control mode with a series of consecutive LED indication patterns.
The number of flashes corresponds to the current value of parameter Control Mode (see Special parameters).
Step
Pattern
Indication
1
Green
number of flashes indicates the tens of the parameter value
2
Red
number of flashes indicates the units of the parameter value
Examples:
for value 1 (control mode 'Analog input'), the green LED will flash 0 times and the red LED 1 time
for value 22 (control mode 'Valve Safe State'), the green and red LED will each flash 2 times
Changing control mode
By briefly pressing the switch 4 times with intervals of up to 1 second in normal operation mode, the instrument enters a
state in which the control mode can be changed.
This is done in 2 steps, each represented by a LED indication pattern (green or red; see table below).
The number of flashes corresponds to the available values of parameter Control Mode (see Special parameters).
At the start of each step, the according LEDs starts flashing fast (0.1 second on, 0.1 second off). By pressing and holding
the switch, the associated action is started and the flashing slows (0.5 seconds on, 0.5 seconds off).
Step
Pattern
Maximum
flash
count
Action
1
Green
2
set tens of parameter value
2
Red
9
set units of parameter value
To execute a step, follow these instructions:
Press and hold the switch (flashing slows)
To select value 0 (zero), release the switch within 1 second, otherwise:
Count the number of LED flashes
Release the switch when the required value is reached
In case you lose count, keep the switch pressed and wait until the flash count reaches its maximum and restarts
On completion of step 1, the instrument automatically advances to step 2. When both steps have been completed, the
instrument returns to its normal operation mode.
If the switch is not pressed within 60 seconds after starting a step, all changes are canceled and the instrument returns to its
normal operation mode.
Note that this procedure also sets the default control mode of the instrument (contrary to changing the control mode
digitally).
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Instruction Manual mini CORI-FLOW™ M1x 9.17.050T22
3.8.2.4 Network settings - readout/change
Reading network settings
By briefly pressing the switch 3 times with intervals of up to 1 second in normal operation mode, the instrument shows
its current node address and baud rate with a series of consecutive LED indication patterns:
Step
Pattern
Indication
1
Green
number of flashes indicates the tens of the node address
2
Red
number of flashes indicates the units of the node address
3
Green and red
(simultaneous)
number of flashes indicates the baud rate
Examples:
for node address 35, the green LED will flash 3 times and the red LED 5 times
for node address 116, the green LED will flash 11 times and the red LED 6 times
On DeviceNet™ the node address is called MAC ID.
The number of flashes for the baud rate indication is associated with the following baud rates:
Number of
flashes
(index)
Baud rate
FLOW-BUS
Modbus
PROFIBUS DP
DeviceNet™
0
automatically detected
1
187500
9600
9600
125000
2
400000
19200
19200
250000
3
38400
45450
500000
4
56000
93750
5
57600
187500
6
115200
500000
7
128000
1500000
8
256000
3000000
9
6000000
10
12000000
Changing network settings
By briefly pressing the switch 5 times with intervals of up to 1 second in normal operation mode, the instrument enters a
state in which the node address and baud rate can be changed (non-Ethernet based protocols only; for Ethernet based
protocols, network parameters are configured by the fieldbus master and cannot be set on the instrument).
Changing network parameters with the multifunctional switch is done in 3 steps, each represented by a LED indication
pattern (see table below).
At the start of each step, the according LED(s) start(s) flashing fast (0.1 second on, 0.1 second off). By pressing and holding
the switch, the associated action is started and the flashing slows (0.5 seconds on, 0.5 seconds off).
Step
Pattern
Maximum
flash
count
Action
1
Green
12
set tens of node address
2
Red
9
set units of node address
3
Green and red
(simultaneous)
10*
set baud rate index (number of flashes)
*) maximum count depends on the supported baud rates of the fieldbus. See the baud rate table above for supported baud
rates and associated indexes.
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Instruction Manual mini CORI-FLOW™ M1x9.17.050T 23
To execute a step, follow these instructions:
Press and hold the switch (flashing slows)
To select value 0 (zero), release the switch within 1 second, otherwise:
Count the number of LED flashes
Release the switch as soon as the required value is reached
In case you lose count, keep the switch pressed and wait until the flash count reaches its maximum and restarts
On completion of a step, the instrument automatically advances to the next step. When all required steps have been
completed, the instrument returns to its normal operation mode.
If the switch is not pressed within 60 seconds after starting a step, all changes in the previous steps are cancelled and the
instrument returns to its normal operation mode.
3.8.2.5 Disabling multifunctional switch
To prevent unwanted use of the multifunctional switch, it can be disabled through the digital interface using the following
procedure:
1. Set parameter Init reset to 64
2. Read parameter IO status
3. Subtract 8 from the read value
4. Write the new value to parameter IO status
5. Set parameter Init reset to 82
To re-enable the switch, add 8 to the value of IO status in step 3.
3.9 Communication modes
The following table lists the communication modes the mini CORI-FLOW supports:
Connection
Type
Communication standard
Fieldbus/protocol
8-pin DIN male
Analog
0…5Vdc
0…10Vdc
0…20mA
4…20mA
n/a
Digital
RS-232
ProPar
Fieldbus specific
Digital
RS-485
FLOW-BUS
Modbus RTU
PROFIBUS DP
DeviceNet™
The communication standards (analog and digital) and fieldbus interface (if applicable) are specified at ordering time, i.e.:
o In analog mode, the instrument is set to the specified voltage/current range
o The dedicated fieldbus connection only provides the specified fieldbus interface
Simultaneous analog and digital operation
The instrument can be monitored and operated through the analog and a digital interface simultaneously, but it only
accepts a setpoint from one of both (this is called the control mode; see Special parameters for more information).
In analog mode, the analog input and output signals are translated to the digital setpoint and measure parameter
respectively.
3.9.1 Analog operation
With analog operation the following parameters are available:
output signal: measured value (voltage or amperage)
input signal: setpoint (voltage or amperage; controller only)
valve voltage (controller only)
Setpoints below 2% of the full scale will be interpreted as 0%.
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Instruction Manual mini CORI-FLOW™ M1x 9.17.050T24
3.9.2 Digital RS-232 operation
Digital operation (RS-232 or fieldbus) adds extra features to the instrument, such as:
Direct reading with a readout/control module or host computer
Diagnostics
Device identification
Adjustable minimum and maximum alarm limits (Alarms)
(Batch) counter (Counter)
Make sure in FlowDDE the correct port and baud rate are selected. For RS-232 operation the baud rate must be 38400
Baud.
3.9.2.1 FlowDDE
Digital Bronkhorst® instruments can be operated via RS-232 using the Bronkhorst® FlowDDE server application. Dynamic
Data Exchange (DDE) provides a basic level of inter process communication between Windows applications. Together with a
client application, either self-made or with a third party SCADA program, it is possible to create an easy way of data
exchange between the flow meter/controller and a Windows application. For instance, a cell in a Microsoft Excel
spreadsheet can be linked to the measured value of an instrument; FlowDDE updates the cell automatically when the
measured value changes.
FlowDDE uses specific parameter numbers for communicating with the instrument. A DDE parameter number is a unique
number in a special FlowDDE instruments/parameter database and not the same as the parameter number from the process
on an instrument. FlowDDE translates the node-address and process number to a channel number.
DDE-client applications communicate with the FlowDDE server by using DDE messages. Before messages can be exchanged,
a DDE link has to be made. A DDE link consists of three parts: the server, the topic and an item. For separation the characters
'|' and '!' may be used, so a DDE link in e.g. Microsoft Excel becomes: Server|Topic!Item.
For standard instrument parameters and the FlowDDE server, these are:
Server: FlowDDE or FlowDDE2
Topic: ‘C(X)’ for channel number X
Item: ‘P(Y)’ for parameter number Y
An example of a DDE link in a Microsoft Excel cell is =FlowDDE|’C(1)’!’P(8)’ to read parameter 8 of channel 1.
When not using FlowDDE for communication with the
instrument, parameters are addressed by:
Node address
Process number
Parameter number
See section Digital parameters for more information about
instrument parameters.
For more information about FlowDDE, including setting up a DDE link, consult the FlowDDE Manual (document no.
9.17.067) or the help file in the application.
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Instruction Manual mini CORI-FLOW™ M1x9.17.050T 25
3.9.2.2 Software (DDE applications)
Examples of free Bronkhorst® DDE client applications: FlowPlot and FlowView. Other software programs supporting DDE are
for example MS-Office, LabVIEW, InTouch and Wizcon.
Bronkhorst® software applications 'FlowView' (left) and 'FlowPlot' (right)
FlowDDE and other Bronkhorst® applications are available on the support CD or can be downloaded from the product
pages on the Bronkhorst website: www.bronkhorst.com/products
3.9.3 Fieldbus operation
FLOW-BUS
Digital Bronkhorst® instruments can be monitored and operated using the free FlowWare software tools for Windows.
These tools provide a graphical interface to the ProPar protocol (used by FLOW-BUS), for monitoring and editing parameter
values.
The FlowWare toolkit provides functionality for monitoring and operating digital instruments (Bronkhorst FlowSuite,
FlowPlot) and selection of the active fluid and configuration of the fieldbus connection (if applicable). For instruments that
support the definition and use of multiple fluids, FlowTune™ can be used to define and store fluids in the instrument and
select the active fluid.
Digital instrument parameters are made accessible by FlowDDE, a Dynamic Data Exchange server (DDE) that handles
communication between the instrument and (dedicated) client software in Windows (e.g. FlowPlot). FlowDDE can also be
used by other client applications, such as Microsoft Office or custom made software, built with third party development
software like LabVIEW or a SCADA platform.
The FlowWare tools and associated documentation can be downloaded from the product pages on the Bronkhorst website:
www.bronkhorst.com/products
Modbus
In a Modbus system instruments can be monitored and operated using third party software as a master device, such as
LabVIEW, ModScan, or a Modbus PLC.
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Instruction Manual mini CORI-FLOW™ M1x 9.17.050T26
PROFIBUS-DP
Instruments in a PROFIBUS DP system can be monitored and operated using third party software as a master device, such as
TIA Portal (by Siemens).
To operate a PROFIBUS DP device, a so-called GSD file (General Station Description) has to be loaded into the software. The
GSD file contains all necessary configuration information to operate the device in a PROFIBUS DP system, including all
available operating parameters with their data types.
A GSD file for Bronkhorst® instruments can be downloaded from the product pages on the Bronkhorst website:
www.bronkhorst.com/products
DeviceNet™
Instruments in a DeviceNet™ system can be monitored and operated using third party software as a master device, such as
TIA Portal (by Siemens).
To configure a device, a so-called EDS file (Electronics Data Sheet) can be loaded into the software. The EDS file contains all
necessary configuration information to operate the device in a DeviceNet™ system, including communication and network
configuration, and all available operating parameters with their data types.
An EDS file for Bronkhorst® instruments can be downloaded from the product pages on the Bronkhorst website:
www.bronkhorst.com/products
3.10 Adjusting zero point
Zero-stability
The zero point of a Bronkhorst® flow meter/controller (the measurement signal that indicates the absence of a flow) is
factory adjusted at approximately 20 °C and atmospheric pressure (ambient conditions), with the instrument positioned
upright. Under normal circumstances (i.e. at stable process conditions), the zero point will remain stable. However, over time
several factors can induce a slight deviation of the measured value from the zero point, causing the instrument to detect a
flow when in reality there is none. Readjusting the zero point eliminates this deviation.
After installation or relocation, always check the zero point.
If the instrument still detects a (steady) flow while all valves are closed and the fluid system is leak tight, adjusting the
zero point is recommended.
The following factors can affect the zero-stability error (in order of importance):
fluid temperature
ambient temperature
mounting orientation
(upstream) pressure
fluid density
fluid viscosity
vibrations from the environment
pressure fluctuations
The table below shows some typical worst case values for different mini CORI-FLOW models. In practice, zero stability will
turn out to be better.
Model
DN (mm)
Zero stability
error
Nominal flow
M12
0.25
< 0.02 g/h
100 g/h
M13
0.5
< 0.2 g/h
1 kg/h
M14
1.3
< 6 g/h
10 kg/h
M15
3.12
< 50 g/h
100 kg/h
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Instruction Manual mini CORI-FLOW™ M1x9.17.050T 27
Prerequisites
Zeroing an instrument requires that:
the ambient conditions (temperature, pressure) match those of the operating environment of the instrument.
the instrument is filled homogeneously and pressurized with the operational media, according to the typical process
conditions.
the instrument has been warmed up sufficiently.
there is absolutely no flow through the instrument; preferably, this is achieved by closing a valve immediately after the
outlet of the instrument (control valve, shut-off valve).
Blocking the flow through the instrument is essential; zeroing an instrument while there is still a flow will lead to
measurement errors.
Methods
Adjusting the zero point of an instrument can be done by the following methods:
manually (by using the multifunctional switch)
digitally (via RS-232 or fieldbus)
with the autozero function of a Bronkhorst® readout and control unit (E-8000, BRIGHT)
Regardless of the preferred method, the procedure takes approximately 60 seconds to complete (longer if the output signal
is unstable).
3.10.1 Manual procedure
To start the autozero function with the multifunctional switch, follow these instructions:
1. Change the setpoint of the instrument to 0 (zero).
2. Press and hold the multifunctional switch. After 4 seconds, the red LED lights up; another 4 seconds later the red LED
extinguishes and the green LED lights up.
3. At that moment (which is after 8 to 12 seconds), release the switch.
The green LED starts to blink fast, indicating that the autozero procedure is in progress. After (successful) completion, the
green LED lights up continuously, while the output signal is 0 % (parameter Measure = 0).
3.10.2 Digital procedure
Bronkhorst FlowSuite and FlowPlot provide an easy way to adjust the zero point of an instrument using RS-232
communication; the Autozero function automatically performs the procedure described here.
To adjust the zero point using digital communication, set parameter values in the following sequence (see section Digital
parameters for more information about instrument parameters):
Sequence #
Parameter
Value
Action
1
Setpoint or fSetpoint
0
stop flow
2
Init Reset
64
unlock secured parameters
3
Control Mode
9
enable calibration mode
4
Calibration Mode
0
reset calibration mode
5
Calibration Mode
9
start zeroing
The green LED starts to blink fast, indicating that the zeroing procedure is in progress. On completion, the green LED lights
up, while the output signal is 0 % (parameter Measure = 0). At the same time, parameter Control Mode returns to its initial
value. If the procedure is successful, parameter Calibration Mode changes to 0 (idle). If the procedure fails, Calibration Mode
changes to 255.
After performing the procedure, remember to set parameter Init Reset to value 82 to lock secured parameters.
3.11 Checking calibration status
The calibration integrity of a mass flow meter for liquids can be verified in a relatively uncomplicated way by using an
accurate weighing scale, or by comparing it with another mass flow meter with a known calibration status as a reference.
This section describes a procedure for checking the calibration status with a weighing scale.
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Instruction Manual mini CORI-FLOW™ M1x 9.17.050T28
The counter functionality of the flow meter can be used to compare a batch with a configurable size (measured by the
instrument itself) to the (real) weight of the displaced liquid that is measured by an accurate weighing scale. To operate the
counter functionality, FlowPlot or a Bronkhorst® readout and control unit (E-8000, BRIGHT) can be used.
Apart from the instrument, the following items are needed for this calibration check:
an accurate weighing scale
a liquid container big enough to hold as much liquid as will get dosed in 2 minutes
a readout and control facility, e.g.:
o a Windows computer with FlowDDE and FlowPlot installed
o a Bronkhorst® readout and control unit
in case of a mass flow meter without control function: a shut off valve, to be installed downstream of the instrument
To perform a calibration check, follow these instructions:
1. Put the container on the weighing scale and tare it
2. Calculate the liquid mass that the instrument should measure in 2 minutes (based on a given setpoint or inlet pressure;
see further)
3. Configure the counter of the instrument to stop the flow as soon as the calculated mass is reached
4. Reset the counter
5. Make sure that the inlet pressure is stable and sufficient for proper control and a stable flow rate
6. Open the valve to fill the container:
a. controller: give a setpoint > 0%
b. meter: open the shut off valve
7. When the configured batch size is reached, compare the measured liquid mass to the mass indicated by the weighing
scale
When comparing both values, take the accuracy and the zero stability of the instrument into account: ± 0.2 RD (for liquids)
+ zero stability error (see Adjusting zero point).
The procedure described here is by no means a proper calibration procedure; it can only be used to get a quick impression of
the calibration status of an instrument. Performing a reliable calibration procedure requires thorough knowledge of the
many parameters involved. Bronkhorst has skilled and experienced staff available that can take care of calibration matters;
contact your Bronkhorst representative for information.
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050T 29
4 Digital parameters
This section describes the most commonly used parameters for digital operation of the mini CORI-FLOW. Descriptions are
grouped by category in tables as shown below:
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
[type]
RW
[x]…[y]
[DDE par]
[Pro]/[Par]
[address]/[register]
In this manual, parameter names are printed in italics (reverted to normal where embedded in italics, like in this tip).
Type
Unsigned char 1 byte unsigned integer (0…255)
Unsigned int 2 byte unsigned integer, MSB first (0…65535)
Unsigned long 4 byte unsigned integer, MSB first (0…4294967295)
Float 4 byte floating point, IEEE 32-bit single precision, MSB first
Unsigned char [x] x byte text string
Access
R Parameter value can be read
W Parameter value can be written
Parameter is secured and only accepts values if parameter Init Reset is set to 'unlocked' first
Range
Some parameters only accept values within a certain range:
[x] Minimum value
[y] Maximum value
FlowDDE
Parameter number within FlowDDE
FLOW-BUS
FLOW-BUS uses the ProPar protocol, where parameters are identified by a unique combination of a process number and a
parameter number.
For more information about setting up a FLOW-BUS network with Bronkhorst® instruments, consult the FLOW-BUS
manual (see Documentation).
For more information about the ProPar protocol, consult the RS-232 manual (see Documentation).
Modbus
In the Modbus protocol, parameters are accessed by specifying their unique decimal register number or corresponding PDU
address (Protocol Data Unit). The PDU address is the hexadecimal translation of the register number minus 1, e.g. register
number 1 corresponds to PDU address 0x0000, register number 11 corresponds to PDU address 0x000A:
[address] Hexadecimal PDU address
[register] Decimal register number
Modbus address blocks are two bytes big. Larger data types use up to 8 subsequent address blocks, resulting in a
maximum variable length of 16 bytes. Values longer than the maximum length are truncated.
For more detailed information about setting up a Modbus network with Bronkhorst® instruments, consult the Modbus
manual (see Documentation).
Other interface protocols
Parameter descriptions in this document are based on their availability with FLOW-BUS, Modbus or RS-232 (ProPar)
communication. Due to limitations in, for example, memory capacity or communication properties, definition files for other
fieldbus systems usually do not make all parameters available.
Not all parameters described in this document are necessarily available with all digital interface types. For information
about parameter access and availability for Bronkhorst® instruments in a specific fieldbus network, consult the according
fieldbus manual.
A summary of all digital parameters described in this section can be found in the back of this manual.
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050T30
4.1 Measurement and control
Measure
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned int
R
0…41942
(65535*)
8
1/0
0x0020/33
This parameter returns a dimensionless representation of the measured flow rate or pressure. The value 32000 corresponds
to 100 %, the maximum value corresponds to 131.07 %.
*In case the instrument is prepared for bi-directional measurement, the negative signals with an output range of -
73.73…-0.003% are represented by the range of 41943…65535, whereas the positive signals 0…131.07% are still
represented by the range of 0…41942. (FlowDDE converts the numbers to negative values automatically).
Setpoint
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned int
RW
0…32000
9
1/1
0x0021/34
This parameter is a dimensionless representation of the required flow rate or pressure. Value 32000 corresponds to 100 %.
Temperature
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
R
-250…500
142
33/7
0xA138…0xA139/41273…41274
This parameter returns the temperature in °C on the outside of the sensor tube, which is an approximation of the actual
media temperature.
Pressure
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…3.4E+38
143
33/8
0xA140…0xA141/41281…41282
This parameter contains a fixed (reference) value that can be used for capacity calculations, etc. Its default value is equal to
that of parameter Inlet pressure.
Density Actual
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
R
0…3.4E+38
270
116/15
0xF478…0xF479/62584…62585
This parameter returns the actual density measured by the instrument in kg/m
3
. If the selected Capacity Unit is a volume flow
type, the instrument uses this parameter for conversion of the measured mass flow to the selected unit.
4.1.1 Advanced measurement and control
fMeasure
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
R
-3.4E+38…
3.4E+38
205
33/0
0xA100…0xA101/ 41217…41218
This parameter represents the value of parameter Measure, expressed in the selected Capacity Unit. Its value is calculated from
the dimensionless value of Measure, using the fluid set parameters Capacity 100% and Capacity Unit.
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050T 31
Fsetpoint
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…3.4E+38
206
33/3
0xA118…0xA119/ 41241…41242
This parameter represents the value of parameter Setpoint, expressed in the selected Capacity Unit. Conversion between
Fsetpoint and the dimensionless value of Setpoint uses fluid set parameters Capacity 100% and Capacity Unit.
Setpoint Slope
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned int
RW
0…30000
10
1/2
0x0022/35
The value of this parameter represents the time it would take to adjust the setpoint if it were changed from 0 to 100 %. This
feature can be used to smooth 'nervous' controller behavior, e.g. to reduce setpoint overshoot or undershoot.
The supported range corresponds to 0…3000 seconds. Default value = 0.
Example:
If Setpoint Slope = 100 it will take 10 seconds to adjust the setpoint if it is changed from 0 to 100%. A setpoint change of 20%
will take (20%/100%)*10 seconds = 2 seconds.
Analog Input
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned int
R
0…65535
11
1/3
0x0023/36
This parameter contains a digital translation of the analog input signal (if applicable).
Valve Output
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned long
RW
0…
16777215
55
114/1
0xF208…0xF209/61961…61962
This parameter represents the controller output signal for control valve operation.
Sensor Type
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…255
22
1/14
0x002E/47
The following sensor types are supported:
Instrument type
Value
Description
Controller
0
Pressure (counter disabled)
1
Liquid volume
2
Liquid /gas mass
3
Gas volume
4
Other (counter disabled)
Sensor
128
Pressure (counter disabled)
129
Liquid volume
130
Liquid/gas mass
131
Gas volume
132
Other (counter disabled)
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050T32
4.2 Alarms
Alarm settings are most easily accessible using Bronkhorst FlowSuite, FlowPlot or FlowView or a Bronkhorst® readout and
control unit.
The built-in alarm functionality can be used to handle different alarm types:
system errors and warnings
min/max alarms
response alarms
batch alarms
master/slave alarms
The alarm type can be set with parameter Alarm Mode. When an alarm is activated, the type can be read out using parameter
Alarm Info. An automatic setpoint change can be set using the parameters Alarm Setpoint Mode and Alarm New Setpoint. It is
also possible to set an alarm delay, to prevent overreaction to small disturbances, using parameter Alarm Delay Time. The
methods by which an alarm can be reset are controlled by Reset Alarm Enable.
Alarm Mode
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…3
118
97/3
0x0C23/3108
Available modes:
Value
Description
0
Alarm off
1
Alarm on absolute limits
2
Alarm on limits related to setpoint (response alarm)
3
Alarm at power-up(e.g. after power-down)
(On DeviceNet™ instruments, only modes 0 and 1 are available)
Alarm Info
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
R
0…255
28
1/20
0x0034/53
This parameter provides information about the event type(s) that triggered an alarm situation. The value is a bitwise
summation of the issued alarm types; convert the value to binary to see which types are issued. The following alarm types
can be issued:
Bit
Value
Type
Description
0
1
Error
Error flag raised
1
2
Warning
Warning flag raised
2
4
Minimum alarm
Measure < Alarm minimum limit
3
8
Maximum alarm
Measure > Alarm maximum limit
4
16
Batch counter alarm
Batch counter reached its limit
5
32
This bit only: Power-up alarm
Alarm possibly caused by a power dip
If combined with bit 2 or 3:
Response alarm
Difference between Measure and Setpoint too big
6
64
Master/slave alarm
Setpoint out of limits (caused by Slave factor)
7
128
Hardware alarm
Hardware error
Alarm Delay Time
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…255
182
97/7
0x0C27/3112
This value represents the time in seconds the alarm action will be delayed when an alarm limit has been exceeded. This
value also delays the alarm off action if an alarm limit is no longer exceeded.
Default value = 0.
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050T 33
Alarm Maximum Limit
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned int
RW
0…32000
116
97/1
0x0C21/3106
Maximum limit for Measure to activate the maximum alarm situation (after Alarm Delay Time). Range 0…32000 represents 0…
100% signal. Alarm Maximum Limit must be greater than Alarm Minimum Limit.
Default value: 0.
Alarm Minimum Limit
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned int
RW
0…32000
117
97/2
0x0C22/3107
Minimum limit for Measure to activate the minimum alarm situation (after Alarm Delay Time). Range 0…32000 represents 0…
100% signal. Alarm Minimum Limit must be smaller than Alarm Maximum Limit.
Default value: 0.
Alarm Setpoint Mode
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…1
120
97/5
0x0C25/3110
Specifies whether or not to change the setpoint after an alarm situation is activated.
Value
Description
0
No setpoint change (default)
1
Change setpoint to Alarm new setpoint
Alarm New Setpoint
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned int
RW
0…32000
121
97/6
0x0C26/3111
New (safe) setpoint during an alarm until reset. Range 0…32000 represents 0…100% setpoint.
Default value: 0
Reset Alarm Enable
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…15
156
97/9
0x0C29/3114
Available reset methods. The value is a bitwise summation of the enabled methods; convert the value to binary to see
which methods are enabled.
Default value: 15 (all bits/methods enabled)
The following methods are supported:
Bit
Value
Description
0
1
By hardware switch (if present)
1
2
Externally (obsolete)
2
4
By parameter Reset
3
8
Automatically (when alarm conditions no longer apply)
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050T34
4.3 Counter
Counter settings are most easily accessible using Bronkhorst FlowSuite, FlowPlot or FlowView or a Bronkhorst® readout
and control unit.
When the instrument is powered down, it remembers the state of the counter. If the counter is active when the
instrument is powered down, it is activated when powered up and then continues to count from the value at the time of
power down.
Counter Mode
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…2
130
104/8
0x0D08/3337
Available modes:
Value
Description
0
Counter off (default)
1
Counting up continuously
2
Counting up until limit reached (set by Counter Limit)
Counter Unit
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char[4]
RW
see table
below
128
104/7
0xE838…0xE839/59449…59450
This parameter contains the name of the counter readout unit.
Counter Unit supports the following values:
Mass
Normal volume
(1.01325 bar(a), 0 °C)
Standard volume
(1.01325 bar(a), 20 °C)
Custom volume
(Capacity Unit Pressure,
Capacity Unit Type
Temperature)
ug, mg, g, kg
uln, mln, ln,
mm3n, cm3n, dm3n, m3n
uls, mls, ls,
mm3s, cm3s, dm3s, m3s
ul, ml, l,
mm3, cm3, dm3, m3
Parameter Density (FlowDDE ID 170) is used to calculate Custom volume.
Counter Value
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…
10000000
122
104/1
0xE808…0xE809/59401…59402
Current counter value in units selected with parameter Counter Unit.
Counter Limit
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…9999999
124
104/3
0xE818…0xE819/59417…59418
Counter limit/batch size in units selected with parameter Counter Unit.
Default value: 0.
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050T 35
Counter Setpoint Mode
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…1
126
104/5
0x0D05/3334
Specifies whether or not to change the setpoint after reaching the counter limit.
Value
Description
0
No setpoint change (default)
1
Change setpoint to Counter new setpoint
Counter New Setpoint
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned int
RW
0…32000
127
104/6
0x0D06/3335
New (safe) setpoint when a counter limit is reached until reset. Range 0…32000 represents 0…100% setpoint.
Default value: 0
Reset Counter Enable
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…15
157
104/9
0x0D09/3338
Available reset methods. The value is a bitwise summation of the enabled reset methods; convert the value to binary to see
which methods are enabled.
Default value: 7 (bits/methods 0, 1 and 2 enabled)
The following methods are supported:
Bit
Value
Description
0
1
By hardware switch (if present)
1
2
Externally (obsolete)
2
4
By parameter Reset
3
8
Automatically (e.g. when counter value is reset)
4.4 Network configuration
Changes made to the network settings will not be restored by a factory reset.
Default settings
Network configuration is done ex factory as ordered. The table below shows the supported configurations for the available
interface protocols (default settings are printed in bold):
Protocol
ProPar
(RS-232)
FLOW-BUS
(RS-485)
Modbus
(RTU/ASCII)
PROFIBUS DP
CANopen
DeviceNet™
Address
3
3…125
1…247
0…126
1…127
0…63
Baud Rate
9600
19200
38400
57600
115200
230400
460800
187500
400000
9600
19200
38400
56000
57600
115200
128000
256000
(autodetect)
9600
19200
45450
93750
187500
500000
1500000
3000000
6000000
12000000
10000
20000
50000
125000
250000
500000
800000
1000000
125000
250000
500000
Parity
0
0
0, 1, 2
2
0
0
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050T36
Communication via fieldbus connection (top connector, RS-485)
Using the RS-232 interface, set the following parameters to configure the instrument for communication via the fieldbus
connection:
Fieldbus1 Address
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…255
199
125/10
0x0FAA/4011
Fieldbus1 Baud Rate
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned long
RW
0…1.0E10
201
125/9
0xFD48…0xFD49/64841…64842
Fieldbus1 Parity
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…2
335
125/12
0x0FAC/4013
The following values are supported:
Value
Description
0
No parity
1
Odd parity
2
Even parity
Communication via standard connection (RS-232/RS-485)
Use the following parameters to configure the instrument for FLOW-BUS or Modbus communication via the side connector:
If the 8-pin DIN connector is set for RS-485 communication, the instrument will not respond to an RS-232 master. In
that case, use the multifunctional switch to enter configuration mode and enable RS-232 communication.
After configuring the required parameters, follow the same procedure to leave configuration mode and restore the
original communication settings (otherwise, configuration mode will remain enabled after the next power-up).
Fieldbus2 Address
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…255
309
124/10
0x0F8A/3979
Fieldbus2 Baud Rate
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned long
RW
0…1.0E10
310
124/9
0xFC48…0xFC49/64585…64586
Fieldbus2 Parity
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…2
336
124/12
0x0F8C/3981
The following values are supported:
Value
Description
0
No parity
1
Odd parity
2
Even parity
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050T 37
4.5 Fluid set
Fluid Set Index
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…7
24
1/16
0x0030/49
With this parameter, any of the pre-configured fluids (up to 8) can be selected. Each fluid has its specific (configurable)
properties, such as Fluid Name, Capacity, etc.
Default value: 0 (fluid 1).
Note that the selected value is equal to the fluid number minus 1 (value 0 corresponds to fluid 1, value 1 to fluid 2, etc.)
Fluid Name
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char[10]
RW
-
25
1/17
0x8188…0x818C/33161…33165
This parameter contains the name of the selected fluid.
Capacity 100%
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
1E-10…
1E+10
21
1/13
0x8168…0x8169/33129…33130
This parameter represents the 100 % readout/control value (span), expressed in the Capacity Unit of the selected fluid.
Capacity 100% is scaled when Inlet Pressure, Fluid Temperature or Fluid Name is changed for the selected fluid.
Capacity Unit
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char[7]
RW
see below
129
1/31
0x81F8…0x81FB/33273…33276
This parameter represents the unit in which Capacity 100% is expressed.
Available units:
Mass flow
Normal volume flow
(1.01325 bar(a), 0 °C)
Standard volume flow
(1.01325 bar(a), 20 °C)
Custom volume flow
(Capacity Unit Type Pressure,
Capacity Unit Type
Temperature)
ug/h, ug/min, ug/s,
mg/h, mg/min, mg/s,
g/h, g/min, g/s,
kg/h, kg/min, kg/s
uln/h, uln/min, uln/s,
mln/h, mln/min, mln/s,
ln/h, ln/min, ln/s,
ccn/h, ccn/min, ccn/s,
mm3n/h, mm3n/m,
mm3n/s,
cm3n/h, cm3n/m, cm3n/s,
m3n/h, m3n/min, m3n/s,
scfh, scfm, scfs,
sccm, slm
uls/h, uls/min, uls/s,
mls/h, mls/min, mls/s,
ls/h, ls/min, ls/s,
ccs/h, ccs/min, ccs/s,
mm3s/h, mm3s/m, mm3s/s,
cm3s/h, cm3s/m, cm3s/s,
m3s/h, m3s/min, m3s/s
ul/h, ul/min, ul/s,
ml/h, ml/min, ml/s,
l/h, l/min, l/s,
cc/h, cc/min, cc/s,
mm3/h, mm3/m, mm3/s,
cm3/h, cm3/m, cm3/s,
m3/h, m3/min, m3/s,
cfh, cfm, cfs
Because of the maximum string length (7 characters), some unit names are abbreviated, for instance mm3n/m means
mm
3
n/min.
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050T38
Capacity Unit Type Temperature
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
-273.15…
3.4E+38
245
33/10
0xA150…0xA151/41297…41298
This parameter defines a reference temperature for conversion of the measured mass flow to a volume flow. See also
parameters Capacity Unit and Counter Unit.
Capacity Unit Type Pressure
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…3.4E+38
246
33/11
0xA158…0xA159/41305…41306
This parameter defines a reference pressure for conversion of the measured mass flow to a volume flow. See also
parameters Capacity Unit and Counter Unit.
4.5.1 Advanced fluid set parameters
Note that the parameters described in this section do not contain any actual measurement values, but only fixed reference
values, which can be used for capacity calculations, etc.
Inlet Pressure
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…3.4E+38
178
113/13
0xF168…0xF169/61801…61802
Upstream pressure of the selected fluid in bar(a)
Outlet Pressure
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…3.4E+38
179
113/14
0xF170…0xF171/61809…61810
Downstream pressure of the selected fluid in bar(a).
Fluid Temperature
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
-250…500
181
113/16
0xF180…0xF181/61825…61826
Temperature of the selected fluid in °C.
Density
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…3.4E+38
170
33/21
0xA1A8…0xA1A9/41385…41386
Density of the selected fluid in kg/m
3
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050T 39
4.6 Controller
The picture below is a simplified visualization of the PID controller algorithm (proportional, integral, derivative) used by
digital Bronkhorst® instruments.
The controller speed controls the overall performance of the controller algorithm. Basically, to adjust the controller
response, only the controller speed needs to be changed.
The algorithm is based upon the difference between the setpoint and the measured value (called the error value). The
correction signal to eliminate the error is assembled from 3 components (giving the algorithm its name):
The P-action (proportional) multiplies the error value by a constant factor, to adjust the measure towards the (new)
setpoint.
The I-action (integral) amplifies the correction signal with a factor depending on the integral of the error value over time.
The D-action (derivative) reduces the strength of the P-action, to prevent overshoot when the (new) setpoint is reached.
The proportional action is enhanced by one of three additional response factors, depending on the control cycle stage:
Open from zero: the setpoint is larger than zero and the measured value is below 2% of the full scale range.
Normal step: the measured value differs more than 2% from the setpoint, typically after changing the setpoint (step).
Stable situation: the measured value differs less than 2% from the setpoint.
For more information about controlling characteristics, consult the FlowPlot manual (document no. 9.17.030).
Control characteristics are optimized during production. These parameters should only be changed if absolutely necessary,
and only by or under the supervision of trained service personnel.
Controller Speed
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0.2…5
254
114/30
0xF2F0…0xF2F1/62193…62194
This parameter sets the overall controller speed factor for the selected fluid. Controller speed is set ex factory between value
'0.5' (slow) and '2' (fast). The default value is '1'.
PID-Kp
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…1E+10
167
114/21
0xF2A8…0xF2A9/62121…62122
PID controller proportional action, multiplication factor.
PID-Ti
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…1E+10
168
114/22
0xF2B0…0xF2B1/62129…62130
PID controller integral action in seconds.
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Instruction Manual mini CORI-FLOW™ M1x 9.17.050T40
PID-Td
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…1E+10
169
114/23
0xF2B8…0xF2B9/62137…62138
PID controller derivative action in seconds. The default value is 0.0.
Open From Zero Response
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…255
165
114/18
0x0E52/3667
Response factor, applied to proportional action when opening the valve from 0%.
Default value: 128 (no correction)
Other values adjust the controller gain (correction signal) as follows: Controller gain = Controller Speed * PID-Kp *
1.05
(response factor - 128)
Normal Step Response
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…255
72
114/5
0x0E45/3654
Response factor, applied to proportional action during normal control (at setpoint step).
Default value: 128 (no correction)
Other values adjust the controller gain (correction signal) as follows: Controller gain = Controller Speed * PID-Kp *
1.05
(response factor - 128)
Stable Situation Response
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…255
141
114/17
0x0E51/3666
Stable situation response, applied when the controller is stable (within a 2% band around the setpoint).
Default value: 128 (no correction)
Other values adjust the controller gain (correction signal) as follows: Controller gain = Controller Speed * PID-Kp *
1.05
(response factor - 128)
Counter Controller Overrun Correction
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…3.4E+38
274
104/10
0xE850…0xE851/59473…59474
Prevent batch size overshoot
higher value: faster correction, less dosing cycles needed
lower value: slower correction, more dosing cycles needed
Counter Controller Gain
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…3.4E+38
275
104/11
0xE858…0xE859/59481…59482
Prevent batch size overshoot by reducing flow when approaching configured batch size
4.7 Master/slave configuration (FLOW-BUS)
Normally, there is no communication between the instruments in a fieldbus system. The FLOW-BUS protocol, however,
provides a feature to set up a master/slave relationship between two instruments. The typical behavior of a slave
instrument is to automatically set its own setpoint relative to the output (measurement value) of its master.
The output value of any instrument in a FLOW-BUS network is automatically available to all other instruments without
extra wiring. A slave instrument can also be a master to other instruments.
To set up a master/slave relationship between instruments, set parameter Control Mode of the slave instrument to ‘FLOW-
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050T 41
BUS slave’ (value 2) or ‘FLOW-BUS analog slave’ (value 13), depending on how the setpoint should be calculated.
The slave instrument polls the output value of its master periodically and uses the slave factor to set its own setpoint
relative to the master's.
To prevent damage to the instruments an/or the system(s) they are connected to, be sure to avoid circular references
between devices on the same fieldbus. The FLOW-BUS system does not have a protection mechanism.
Master Node
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
1…128
158
33/14
n/a
Sets the master node for the instrument.
Note that this parameter is only effective in a FLOW-BUS network (RS-485).
Slave Factor
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…500
139
33/1
0xA108…0xA109/41225…41226
The controller output from the master instrument is multiplied by Slave Factor/100 % to get the slave instrument setpoint.
In systems other than FLOW-BUS, Slave Factor is effective only if Control Mode is set to 'Analog slave', and the analog output
signal of the master instrument is redirected to the input of the slave instrument.
Example:
master output = 80 %
Slave Factor = 50
slave instrument setpoint = 80 % x 50 %/100 % = 40 %
4.8 Device identification
User Tag
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char[16]
RW
-
115
113/6
0xF130…0xF137/ 61745…61752
With this parameter, the instrument can be given a custom tag name, with a maximum of 16 characters.
Customer Model
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char[16]
RW
-
93
113/4
0xF120…0xF127/ 61729…61736
This parameter is used to add extra information to the model number information, such as a customer-specific model
number.
Serial Number
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char[20]
R
-
92
113/3
0xF118…0xF11F/ 61721…61728
Instrument serial number for identification.
BHT Model Number
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char[35]
RW
-
91
113/2
0xF110…0xF117/ 61713…61720
This parameter shows the Bronkhorst® instrument model type information.
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Instruction Manual mini CORI-FLOW™ M1x 9.17.050T42
Firmware Version
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char[6]
R
-
105
113/5
0xF128…0xF12A/ 61737…61739
Revision number of the firmware
Identification Number
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…255
175
113/12
0x0E2C/3629
Bronkhorst® (digital) device type identification number.
Device Type
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char[6]
R
-
90
113/1
0xF108…0xF10A/ 61705…61707
Device type information string; this parameter contains an abbreviation referring to the identification number.
4.9 Special parameters
Init Reset
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
82/64
7
0/10
0x000A/11
Init Reset is used to unlock secured parameters (marked with a symbol) for writing. It supports the following values:
Value
Description
64
unlocked, secured parameters can be read and written to
82
locked, secured parameters are read-only
At power-up, Init Reset is always set to ‘Locked’ (value 82).
Reset
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
R
0…7
114
115/8
0x0E68/3689
This parameter is used to reset the program, counter or alarms.
Value
Description
0
No reset
1
Reset counter
2
Reset alarm
3
Reset counter
4
Reset and disable counter
5
Reset firmware program (soft reset)
6
Reset Alarm info error bit
7
Reset Alarm info warning bit
The Reset parameter may be disabled by Reset Alarm Enable or Reset Counter Enable. Make sure the value is accepted
by sending value 0 first.
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050T 43
Wink
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char [27]
W
0…9*
1
0/0
0x0000/1
Sending any text string value between 1 and 9 to this parameter makes the indication LEDs (if present) blink for a couple of
seconds. This can be useful in order to identify a specific device in a large fieldbus network.
*) Modbus only supports value 14592
Control Mode
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…255
12
115/1
0x0024/37
Control Mode is used to select different control modes of the instrument and determines from which source(s) it accepts a
setpoint.
The following modes are available:
Value
List option
Description
Setpoint source
0
Bus/RS232
Normal digital operation
Fieldbus or RS-232
1
Analog input
Normal analog operation
Analog input
2
FLOW-BUS slave
Acting as slave instrument on FLOW-BUS
FLOW-BUS master
3
Valve close
Controller disabled, valve closed
4
Controller idle
Controller disabled, valve frozen in current position
7
Setpoint 100%
Setpoint fixed at 100 %
8
Valve fully open
Controller disabled, valve fully open
9
Calibration mode
Calibration mode enabled
10
Analog slave
Acting as slave of other instrument in analog mode
Analog input
12
Setpoint 0%
Setpoint fixed at 0%
13
FLOW-BUS analog slave
Acting as slave of other instrument on FLOW-BUS, slave
factor set by analog input signal
Analog input
18
RS232
Controlling, default/safe state disabled
Fieldbus or RS-232
20
Valve steering
Controller disabled, setpoint redirected to Valve Output
21
Analog valve steering
Controller disabled, analog input redirected to Valve Output
Default value: 0 or 1 (as ordered).
If Control Mode is changed to value 0, 1, 9 or 18, the instrument returns to the default value at the next power-up or reset.
Other values are persistent.
Control Mode 18 prevents the instrument from assuming its default/safe state in the event of a digital communication
failure.
The column labeled List option shows the control modes as used in Bronkhorst® software.
Calibration Mode
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0, 9, 255
58
1/4
0x0E61/3682
After enabling calibration mode by means of parameter Control Mode, this parameter is used to start the autozero function
of the flow sensor. The following modes are supported:
Value
Description
0
Idle (no action)
9
Start zeroing
255
Error (result of previous calibration mode)
4.9.1 Default control mode
IO Status
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…255
86
114/11
0x0E4B/3660
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Instruction Manual mini CORI-FLOW™ M1x 9.17.050T44
The instrument is set to accept a setpoint from either an analog or a digital source. Although this setting can be changed
with parameter Control Mode, the instrument usually returns to its default control mode at every power-up or reset. The
default control mode can be set with parameter IO Status; to change it, use the procedures as described below.
Changing from digital operation to analog operation:
1. Set parameter Init Reset to 64 (unlocked)
2. Read parameter IO Status
3. Add 64 to the read value
4. Write the new value to parameter IO Status
5. Set parameter Init Reset to 82 (locked)
Changing from analog operation to digital operation:
1. Set parameter Init Reset to 64 (unlocked)
2. Read parameter IO Status
3. Subtract 64 from the read value
4. Write the new value to parameter IO Status
5. Set parameter Init Reset to 82 (locked)
The procedures described above do not change the value of parameter Control Mode. To apply the new default control
mode, reset or restart the instrument.
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Instruction Manual mini CORI-FLOW™ M1x9.17.050T 45
5 Troubleshooting and service
Electronic problems can be traced by restarting the equipment.
If the equipment starts up normally, the measurement and control behavior can be checked by applying fluid pressure.
To track down problems in the fluid system, depressurize the fluid system and disconnect the suspected unit from the
process line. Dirt or clogging might be quickly detected by visual inspection of disassembled fluid connections.
If you suspect leakage, do not disassemble the device for inspection, but contact your Bronkhorst representative for service
or repairs.
5.1 Errors and warnings
See LED indications for an explanation of all possible LED indications.
In case of problems during operation, error and warning information can be found in FlowDDE and FlowPlot. FlowDDE
puts all errors and warnings on the console screen; FlowPlot provides several alarm and counter indicators. See also section
Digital RS-232 operation.
5.2 Restoring factory settings
In case changes to the instrument configuration leads to non-recoverable erroneous behavior, the instrument can be reset
to the pre-configured factory settings. This can be done with the following methods:
with the multifunctional switch (see Multifunctional switch)
with the restore function of a Bronkhorst® readout and control unit (BRIGHT, E-8000)
via RS-232 communication, with the Restore settings function in FlowPlot
Changes made to the network settings (bus address, baud rate, parity) will not be restored by a factory reset.
5.3 Common issues
Symptom
Possible cause
Action
Red LED glows continuously
No liquid in measuring tube
Flush instrument with process fluid prior to
starting measurement and control (see First
use)
Slug flow (combined gas and
liquid flow)
Make sure the measuring tube only contains
either gas or liquid (see First use)
Hardware error
Return equipment to factory
No fieldbus communication
No power supply
Check power supply
Check cable connection
Check cable hook-up
Invalid node address
Change node address (see Network
configuration)
Other
Reset instrument and/or restart master. Contact
Bronkhorst if problem persists.
No output signal
No power supply
Check power supply
Check cable connection
Check cable hook-up
Inlet pressure or differential
pressure too low
Increase inlet pressure
Piping, filters and/or control valve
clogged or blocked
Clean system (flush with clean, dry air or a
non-aggressive cleaning liquid (e.g. ethanol
or isopropyl alcohol)
For external proportional control valves:
supply 0…15 Vdc and operational inlet
pressure to valve and slowly increase
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050T46
Symptom
Possible cause
Action
voltage. If valve does not open, clean parts
and re-adjust valve
Sensor failure
Return equipment to factory
Control behavior unstable
Red LED flashes irregularly
Gas accumulation in tubing
Flush the system to remove gas
Tip: use frequency or density signal to detect
presence of gas bubbles
Measurement disturbed by
mechanical vibration
If possible, avoid installation in close
proximity of mechanical vibration
Reduce sensitivity to vibrations by using a
mass block, shock absorbers, and flexible
tubing
Inlet pressure unstable
Eliminate pressure fluctuations, e.g. by
installing a pressure regulator
Wrong controller settings
Adjust settings (e.g. with FlowPlot)
No flow (sending a setpoint has no
effect)
No fluid supply
Check upstream components for obstruction,
e.g.:
fluid lines
valves
filters
Inlet pressure or differential
pressure out of bounds
Set inlet pressure to a value within
specifications
Flow rate rises, but never reaches
setpoint
Piping, filters and/or control valve
clogged or blocked
Clean system (flush with clean, dry air or a
non-aggressive cleaning liquid (e.g. ethanol
or isopropyl alcohol)
For external proportional control valves:
supply 0…15 Vdc and operational inlet
pressure to valve and slowly increase
voltage. If valve does not open, clean parts
and re-adjust valve
Inlet pressure too low
Increase inlet pressure
Outlet pressure too high
Check outlet pressure
Process outlet blocked
Check process outlet and downstream piping
Measured value or output signal
much lower than setpoint
Inlet pressure or differential
pressure too low
Increase inlet pressure
Use instrument in conditions it was designed
for
Piping or filters blocked or
contaminated
Clean system
Sensor blocked or contaminated
Clean sensor
Valve blocked or contaminated
Clean valve
Supplied fluid type does not match
configured fluid type
Supply equipment with other fluid or change
fluid type in instrument configuration
Measured value or output signal
indicates a flow, while there should
be none
Mounting orientation and/or
process conditions changed
significantly
Install instrument according to mounting
recommendations
Use instrument in conditions it was designed
for
Adjust zero point
Control valve leaking
Clean valve; if problem persists, return
equipment to factory
System leakage
Check the system for leakage. Follow vendor
instructions when installing third party
components (e.g. adapters, tubing, valves)
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Instruction Manual mini CORI-FLOW™ M1x9.17.050T 47
Symptom
Possible cause
Action
Continuous maximum measured
value or output signal
Inlet pressure too high
Check inlet pressure
Control valve (normally open)
failure
Return equipment to factory
Sensor failure
Return equipment to factory
Flow rate decreases gradually
Condensation on measuring tube
(might occur with NH
3
and some
hydrocarbons, such as C
3
H
8
, C
4
H
10
)
Increase media temperature to above ambient
conditions
Measured flow rate erroneous
Calibration status compromised
Check calibration status
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Instruction Manual mini CORI-FLOW™ M1x 9.17.050T48
5.4 Service
For current information about Bronkhorst® and worldwide service addresses, please visit our website:
www.bronkhorst.com
Do you have any questions about our products? Our Sales department will gladly assist you selecting the right product for
your application. Contact sales by e-mail:
sales@bronkhorst.com
For after-sales questions, help and guidance, our Customer Care department is available by e-mail:
aftersales@bronkhorst.com
No matter the time zone, our experts within the Customer Care department are available to answer your request
immediately or take appropriate further action. Our experts can be reached at:
+31 859 02 18 66
Bronkhorst High-Tech B.V.
Nijverheidsstraat 1A
NL-7261 AK Ruurlo
The Netherlands
Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050T 49
6 Returns
6.1 Removal and return instructions
When returning materials, always clearly describe the problem, and, if possible, the work to be done, in a covering letter.
Instrument handling:
1. Purge all fluid lines (if applicable)
2. If the instrument has been used with toxic or otherwise hazardous fluids, it must be cleaned before shipping
3. Disconnect all external cabling and tubing and remove the instrument from the process line
4. If applicable, secure movable parts with appropriate transport safety materials, to prevent damage during
transportation
5. The instrument must be at ambient temperature before packaging
6. Insert the instrument into a plastic bag and seal the bag
7. Place the bag in an appropriate shipping container; if possible, use the original packaging box
Add documentation:
Reason of return
Failure symptoms
Contaminated condition
Declaration on decontamination
It is absolutely required to notify the factory if toxic or dangerous fluids have been in contact with the device!
This is to enable the factory to take sufficient precautionary measures to safeguard the staff in their repair department.
All instruments must be dispatched with a completely filled in 'Declaration on decontamination'. Instruments without this
declaration will not be accepted.
A safety information document containing a 'Declaration on decontamination' form (document no 9.17.032) can be
downloaded from the Service & Support section of the Bronkhorst website (www.bronkhorst.com).
Important:
Clearly note, on top of the package, the customs clearance number of Bronkhorst High-Tech B.V.:
NL801989978B01
(only if applicable, otherwise contact your Bronkhorst representative for local arrangements.)
6.2 Disposal (end of lifetime)
If you are a customer within the European Union and wish to dispose of Bronkhorst® equipment bearing the
symbol of a crossed out waste disposal bin, you can return it in accordance with the removal and return
instructions. Bronkhorst will then take care of proper dismantling, recycling and/or reuse (wherever possible).
In the covering letter, mention that you are returning the product for disposal.
In countries outside the EU, disposal of electrical and electronic equipment (EEE) may be subject to local or
national directives and/or legislation. If applicable, consult local or national authorities to learn how to
handle EEE properly in your area.
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Instruction Manual mini CORI-FLOW™ M1x 9.17.050T50
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Instruction Manual mini CORI-FLOW™ M1x9.17.050T 51
Parameter index
Parameters
Parameters - Alarms
Alarm Delay Time 32
Alarm Info 32
Alarm Maximum Limit 33
Alarm Minimum Limit 33
Alarm Mode 32
Alarm New Setpoint 33
Alarm Setpoint Mode 33
Reset Alarm Enable 33
Parameters - Controller
Controller Speed 39
Counter Controller Gain 40
Counter Controller Overrun Correction 40
Normal step response 40
Open from zero response 40
PID-Kp 39
PID-Td 40
PID-Ti 39
Stable situation response 40
Parameters - Counter
Counter Limit 34
Counter Mode 34
Counter New Setpoint 35
Counter Setpoint Mode 35
Counter Unit 34
Counter Value 34
Reset Counter Enable 35
Parameters - Device identification
BHT Model Number 41
Customer Model 41
Device type 42
Firmware version 42
Identification number 42
Serial Number 41
User Tag 41
Parameters - Fluid set
Capacity 100% 37
Capacity Unit 37
Capacity Unit Type Pressure 38
Capacity Unit Type Temperature 38
Fluid Name 37
Fluid Set Index 37
Parameters - Fluid set (advanced)
Density 38
Fluid Temperature 38
Inlet Pressure 38
Outlet Pressure 38
Parameters - Master/Slave
Master Node 41
Slave Factor 41
Parameters - Measurement and control
Analog Input 31
Density Actual 30
Fmeasure 30
Fsetpoint 31
Measure 30
Pressure 30
Sensor Type 31
Setpoint 30
Setpoint Slope 31
Temperature 30
Valve Output 31
Parameters - Network configuration
Fieldbus1 Address 36
Fieldbus1 Baud Rate 36
Fieldbus1 Parity 36
Fieldbus2 Address 36
Fieldbus2 Baud Rate 36
Fieldbus2 Parity 36
Parameters - Special
Control Mode 43
Init Reset 42
IO Status 43
Reset 42
Wink 43
