BRONKHORST Mini CORI-FLOW MI Series User manual

mini CORI-FLOW™ MI series
Industrial Coriolis Mass Flow
Meters/Controllers for Liquids and Gases
Doc. no.: 9.17.120 rev. D Date: 31-05-2021
Instruction Manual
ATTENTION
Pleaseread this document carefully beforeinstalling and operating theproduct.
Not following the guidelines could resultin personal injury and/or damageto the equipment.

Bronkhorst®
Instruction Manual MI Series Industrial mini CORI-FLOW™ 9.17.120D2
Copyright
© 2021 Bronkhorst High-Tech B.V.
All rights reserved. No part of this publication may be reproduced, distributed, or transmitted in any form or by any means,
without the prior written permission of the publisher.
Disclaimer
This document has been reviewed and is believed to be accurate. Bronkhorst High-Tech B.V. does not assume liability for
errors, inaccuracies or absence of information. The material in this document merely serves information and illustration
purposes; no rights can be derived from its contents.
Bronkhorst High-Tech B.V. reserves the right to modify or improve its products and documentation without informing
anyone. As such, the information contained in this document is subject to change without notice. Device specifications and
the contents of the package may deviate from what is stated in this document.
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.
· Check the packing list to ensure that you received all items included in the scope of delivery
· Do not discard spare or replacement parts with the packaging material
Refer to Removal and return instructions 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 for information about required storage conditions.

Bronkhorst®
Instruction Manual MI Series Industrial mini CORI-FLOW™9.17.120D 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 avoid 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.
If required, replace fuses with the same type and rating for continued protection against fire hazard.
Opening the equipment beyond the wiring terminal box cover 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.

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Instruction Manual MI Series Industrial mini CORI-FLOW™ 9.17.120D4

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Instruction Manual MI Series Industrial mini CORI-FLOW™9.17.120D 5
Table of contents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Introduction 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.1 Scope of this manual
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.2 Intended use
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81.3 Product description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81.4 Product overview
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.5 Calibration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.6 Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.7 Documentation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Product specifications 2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112.1 Pressure rating
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122.2 Model key
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.3 Customized I/O options
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Installation 3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153.1 Mounting
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Orientation 3.1.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Location in fluid system 3.1.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Piping requirements 3.1.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Fluid connections 3.1.4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Mechanical isolation 3.1.5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163.2 Electrical connection
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Accessing wiring terminals 3.2.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Operation 4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184.1 Powering up
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184.2 First use
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184.3 Preventing slug flow
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184.4 After use
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184.5 Powering down
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194.6 Valve Safe State
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194.7 Temperature considerations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Preventing condensation 4.7.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Cleaning temperature 4.7.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204.8 Communication
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Analog operation 4.8.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Digital operation 4.8.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21RS-232 operation 4.8.2.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Fieldbus operation 4.8.2.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214.9 Hardware interface
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22LED indications 4.9.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Multifunctional switch 4.9.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Normal operating functions 4.9.2.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Power-up functions 4.9.2.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Control mode - readout/change 4.9.2.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Network settings - readout/change 4.9.2.4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Rotary switches 4.9.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Bus termination switches 4.9.4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Service port 4.9.5

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Instruction Manual MI Series Industrial mini CORI-FLOW™ 9.17.120D6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274.10 Adjusting zero point
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Digital procedure 4.10.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Manual procedure 4.10.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Digital parameters 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305.1 Measurement and control
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Advanced measurement and control 5.1.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325.2 Alarms
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335.3 Counter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355.4 Network configuration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 365.5 Fluid set
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Advanced fluid set parameters 5.5.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 385.6 Controller
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 395.7 Master/slave configuration (FLOW-BUS)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 405.8 Device identification
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 415.9 Special parameters
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42Default control mode 5.9.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Troubleshooting and service 6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 446.1 Errors and warnings
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 446.2 Replacing fuses
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 456.3 Restoring factory settings
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Manual procedure 6.3.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 456.4 Common issues
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 486.5 Service
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Removal and return instructions 7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Parameter index

Bronkhorst®
Instruction Manual MI Series Industrial mini CORI-FLOW™9.17.120D 7
1Introduction
1.1 Scope of this manual
This manual contains general product information, installation and operating instructions and troubleshooting tips for the
MI Series Industrial mini CORI-FLOW™ industrial mass flow meters and - if combined with an external valve - controllers for
liquids and gases.
1.2 Intended use
The MI Series Industrial mini CORI-FLOW™ is designed to measure and/or control mass flow rates of non-aggressive gases
and liquids in a fluid system at conditions as specified at ordering time and as stated on the serial number label. The
instrument is less suitable for use with corrosive, erosive, reactive or otherwise aggressive media, as these can cause wear
and damage to the measuring tube.
The instrument is built into a robust, weatherproof housing, making it especially suitable for operation in a wide range of
industrial environments, like pilot plants.
Any other use than mentioned here is considered unintended.
The wetted materials incorporated in the MI Series Industrial mini CORI-FLOW™ 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 end user.
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. The end user is responsible for taking the necessary
safety precautions and proper use of appropriate (personal) protective equipment, even if such is not explicitly
recommended or required in this document.
The end user is considered to be familiar with the necessary safety precautions, and to comply with the appropriate
protective measures as described in the Material Safety Data Sheets of the media to be used in the system (if applicable).
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.

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Instruction Manual MI Series Industrial mini CORI-FLOW™ 9.17.120D8
1.3 Product description
The Bronkhorst® MI Series Industrial mini CORI-FLOW™ is an accurate mass flow meter and controller for measuring gas and
liquid flows, virtually independent of pressure and temperature changes. It can be operated analog, via RS-232 or HART, or
via an optional fieldbus interface (CANopen, DeviceNet™, EtherCAT®, Ethernet/IP, FLOW-BUS, Modbus (RTU/ASCII/TCP),
POWERLINK, PROFIBUS DP, and PROFINET). For RS-232 and FLOW-BUS communication, Bronkhorst offers free tooling
software (e.g. FlowPlot).
Measuring principle
MI Series Industrial mini CORI-FLOW™ instruments contain a uniquely shaped, single loop sensor tube, forming part of an
oscillating system. When a fluid flows through the tube, Coriolis forces cause a variable phase shift, which is detected by
sensors and fed into the integrally mounted printed circuit board. The resulting output signal is strictly 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 MI Series features density and temperature of the
fluid as secondary outputs.
Multi-range
The MI Series Industrial mini CORI-FLOW™ offers multi-range functionality: factory calibrated ranges can be re-ranged to a
different full scale range. 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 (if applicable), or with a Bronkhorst® readout and
control unit (E-8000, BRIGHT).
The instrument comes with a calibration certificate for all supported full scare flow ranges. The actual full scale of the
instrument is set to a value as ordered and can be found on the serial number label.
Custom I/O options
The Main connector and the Actuator connector (see Product overview) each can provide additional input/output
functionality, selectable from a wide range of options (see Customized I/O options). In addition to the various analog signal
options and the standard RS-232 communication, there are such options as RS-485 communication, digital frequency/pulse
output, alarm output/reset, valve purge/close and analog valve output.
1.4 Product overview
Left side
1. Fluid inlet
2. Indication LEDs
3. Fieldbus connection gland 1 (optional)
4. Fieldbus connection gland 2 (optional)
5. Cover
Right side
6. Additional actuator/remote display connector (optional)
7. Main connector
8. Bronkhorst® valve connector (optional)
9. Fluid outlet
Depending on the ordering details, fittings and/or connectors on your instrument might differ from the images above.

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Instruction Manual MI Series Industrial mini CORI-FLOW™9.17.120D 9
1.5 Calibration
The MI Series has been factory calibrated. Periodical inspection, recalibration or verification of the accuracy may be subject
to individual requirements of the end user.
Bronkhorst certifies that the instrument meets the rated accuracy. Calibration has been performed using measurement
standards traceable to the Dutch Metrology Institute (VSL).
1.6 Maintenance
The MI Series needs no regular maintenance if operated properly, with clean media, compatible with the wetted materials,
avoiding pressure and thermal shocks and vibrations. Units 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 internal fluid path (the wetted parts) of the instrument may be necessary.
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 a trained staff available.
1.7 Documentation
The MI Series comes with all necessary documentation for basic operation and maintenance. At some points this document
refers to other documents, most of which can be downloaded from the Bronkhorst website. Insofar as agreed upon within
the framework of the sales agreement, calibration certificates, test certificates and material certificates are included in the
scope of delivery.
The documentation listed in the following table is available on the MI Series product pages under
www.bronkhorst.com/products :
Type
Document name
Document no.
Manuals
Instruction Manual MI Series Industrial mini CORI-FLOW™ (this
document)
9.17.120
Technical documentation
Hook-up diagram Analog, RS-232, HART
9.16.199
Hook-up diagram DeviceNet™, CANopen
9.16.262
Hook-up diagram EtherCAT®, Ethernet/IP, Modbus TCP, POWERLINK,
PROFINET
9.16.200
Hook-up diagram FLOW-BUS
9.16.201
Hook-up diagram Modbus (ASCII/RTU)
9.16.202
Hook-up diagram PROFIBUS DP
9.16.203
Hook-up diagram custom bus & I/O configurations
9.16.205
Dimensional drawing
7.14.001

Bronkhorst®
Instruction Manual MI Series Industrial mini CORI-FLOW™ 9.17.120D10
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
Instruction manuals
Manual CANopen
9.17.131
Manual DeviceNet™
9.17.026
Manual EtherCAT® interface
9.17.063
Manual Ethernet/IP
9.17.132
Manual FLOW-BUS interface
9.17.024
Manual HART interface
9.17.121
Manual Modbus interface
9.17.035
Manual POWERLINK
9.17.142
Manual PROFIBUS DP interface
9.17.025
Manual PROFINET interface
9.17.095
Manual RS-232 interface
9.17.027

Bronkhorst®
Instruction Manual MI Series Industrial mini CORI-FLOW™9.17.120D 11
2Product specifications
Before installing the MI Series, check that the functional and technical properties of the product match your requirements. If
you have a question about the product or if you find the product does not meet the specifications as ordered, do not
hesitate to contact your Bronkhorst representative. See section Service for contact information.
The serial number label shows some essential technical specifications of the product as ordered
(note that the image on the right does not necessarily reflect the actual specifications of your MI
Series instrument):
· Flow/pressure rate(s)
· Process media
· Inlet and outlet pressure(s)
· Operating temperature
The model key on the second line of the label contains more detailed information about the
technical properties of the product as ordered.
Where applicable, follow the directions on any additional labels in order to ensure a safe working
environment and to comply with the regulations applicable to the product and its operating
environment.
2.1 Pressure rating
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.

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Instruction Manual MI Series Industrial mini CORI-FLOW™ 9.17.120D12
2.2 Model key
The model key contains information about the technical properties of the instrument as ordered. The actual properties of
your instrument can be retrieved from the diagram below.

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Instruction Manual MI Series Industrial mini CORI-FLOW™9.17.120D 13
2.3 Customized I/O options
Optionally, MI Series instruments can be equipped with up to two additional input/output functions. These options are
factory installed as specified at ordering time, and cannot be changed manually.
The model key on the serial number label contains information about the customized I/O configuration of your instrument.
The possible configurations are described in the table below. Consult the hook-up diagram for custom bus and I/O
configurations for an explanation of the codes.
Code
Description
000
Disabled, M8/A2 is pulled down to 0Vdc (default selection)
A1V
0…10Vdc sourcing output, controller
Analog signal for pump or external valve steering (control signal only)
When the controller output is used for pump or external valve steering (mass flow meters only), make sure
to set parameter Valve maximum to 0.3 [A]. For mass flow controllers, the controller output is limited to a
value below 10Vdc, due to the maximum valve current restriction.
B1V
4…20mA sourcing output, controller
Analog signal for pump or external valve steering (control signal only).
When the controller output is used for pump or external valve steering (mass flow meters only), make sure
to set parameter Valve maximum to 0.3 [A]. For mass flow controllers, the controller output is limited to a
value below 20mA, due to the maximum valve current restriction.
B2V
3.8…20.8mA sourcing output, controller
Analog signal for Badger Meter valve with TEIP11 signal converter (control signal only)
C3A
Digital output, min/max alarm
During a min/max alarm, M8/A2 is pulled down to 0Vdc.
C4A
Digital output, counter alarm
During a counter alarm, M8/A2 is pulled down to 0Vdc.
C5S
Digital output, enabled by setpoint (for shut-off control)
M8/A2 is pulled down to 0Vdc at a controller setpoint, e.g. for shut-off valve activation.
For factory selected analog control:
If parameter Control mode is set for analog control by factory, the minimum setpoint at which the device
(shut-off valve) connected to M8/A2 is activated is 1.9%. This prevents possible noise on the analog input
activating the device accidentally.
For factory selected digital control:
If parameter Control mode is set for digital control by factory, the setpoint threshold for activating the
device connected to M8/A2 is any value > 0.
Note: If the instrument is forced into Valve Safe State, the digital output is not affected, so a (n/c) shut-off
valve connected to M8/A2 will not close when the (n/c) controller is in Valve Safe State’
Make sure to use 24Vdc power supply corresponding to the shut-off valve specifications.
C0I
Digital output, high/low switch via remote parameter (e.g. for shut-off valve control)
M8/A2 is pulled down to 0Vdc when writing value 1 to parameter IO switch status, this is undone by writing
value 0.
A device connected to M8/A2 (e.g. a shut-off valve) can be activated/de-activated by writing parameter IO
switch status.
Note: If the instrument is forced into Valve Safe State, the digital output is also affected, so a (n/c) shut-off
valve connected to M8/A2 will be closed when the (n/c) controller is in ‘Valve Safe State’.
Make sure to use 24Vdc power supply corresponding to the shut-off valve specifications.

Bronkhorst®
Instruction Manual MI Series Industrial mini CORI-FLOW™ 9.17.120D14
Code
Description
D9E
Digital frequency output, measure
Measurement value is translated to a frequency within given frequency range.
The default frequency range to represent 0…100% flow is 0…10000 Hz. Any other frequency range must be
specified on order.
F9B
Digital pulse output, batch counter
M8/A2 is pulled down to 0Vdc when a given batch size is reached (during a given pulse length).
By default, a pulse is given at each 1x the Counter unit batch value, with a pulse length of 1 second. For
instance, when Counter unit is set to 'ln', a pulse is given each time 1 ln has passed through the instrument.
An alternative pulse length must be specified on order.
Provide a pull-up resistor of 5…10kOhm to create 15…24Vdc at M8/A2 (according to the applicable hook-
up diagram).
I3C
Digital input, controller mode valve close
Valve closes when M8/A2 is connected to 0Vdc.
This option switches between the default Control mode and mode ‘Valve Close’ (value 3). When the default
Control mode is digital, the default value is 0 (bus/RS-232), when the default Control mode is analog, the
default value is 1 (Analog input).
I8C
Digital input, controller mode valve purge
Valve is fully opened when M8/A2 is connected to 0Vdc.
This option switches between the default Control mode and mode ‘Valve Fully Open’ (value 8). When the
default Control mode is digital, the default value is 0 (bus/RS-232), when the default Control mode is analog,
the default value is 1 (Analog input).
I1R
Digital input, reset counter
The counter resets when M8/A2 is connected to 0Vdc.
I2R
Digital input, reset alarm
The alarm resets when M8/A2 is connected to 0Vdc.

Bronkhorst®
Instruction Manual MI Series Industrial mini CORI-FLOW™9.17.120D 15
3Installation
3.1 Mounting
For optimal performance, installation in a vibration free position is
essential. The bottom of the instrument body is fitted with two sets of 4
mounting holes; use these mounting holes 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, Bronkhorst
can supply special suspension pads for stable, vibration free fixation.
These suspension pads are for upright mounting of the MI Series only
and can be installed in the outer mounting holes. Contact your local
Bronkhorst representative for more information.
· Always use the mounting holes to fixate the instrument. Consult the dimensional drawing for the exact locations and
size of the mounting holes.
· Also make sure that the instrument is not suspended by the piping and take adequate measures to isolate the instrument
from vibrations in the piping.
3.1.1 Orientation
Generally, the reliability of a MI Series instrument is not affected by the mounting orientation.
3.1.2 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.
· 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.
3.1.3 Piping requirements
· For reliable performance, make sure the fluid stream is uncontaminated. If necessary, use an inlet filter to ensure a
moisture, oil and particle free gas stream. Select a filter with a surface area and pore size that minimize the pressure
drop.
· If back flow could occur, the use of a check valve is also recommended.

Bronkhorst®
Instruction Manual MI Series Industrial mini CORI-FLOW™ 9.17.120D16
3.1.4 Fluid connections
· Install the MI Series in the process line, in accordance with the direction of the FLOW arrow on the base of
the instrument.
· For leak tight installation, follow the guidelines of the supplier of the fittings.
Bronkhorst® MI Series meters/controllers can be fitted with different fitting types (e.g. compression or face-seal) or special
fitting types on request.
Check the fluid system for leaks before applying full operating pressure, especially when using hazardous media (e.g. toxic
or flammable).
After using the MI Series for the first time with low temperature media, re-tighten the fluid connectors in order to prevent
leakage.
3.1.5 Mechanical isolation
· If multiple MI Series instruments will be used in the same fluid system or close to each other, vibrations from one
instrument might interfere with the resonance frequency of another, e.g. through piping or a mounting frame.
· Isolate instruments mechanically by mounting them on individual, rigid, stiff bases. Preferably, mount multiple
instruments parallel to each other, and use flexible piping.
3.2 Electrical connection
· Electrical connections must be made according to the applicable hook-up diagrams, using suitable cables with respect to
required supply current, voltage loss, cable and gland diameters and operating conditions.
· When using self-assembled cables, follow the guidelines provided by the connectors' manufacturer.
· For use in fieldbus systems, follow the instructions of the cable supplier for the specific fieldbus system.
· 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.
· If a surge protection device is used, make sure its specifications match the power consumption of the application.
· Before powering up, make sure all required cabling is properly connected.
· Before each use, inspect cabling and connectors for damage.
The equipment described in this document contains electronic components that are susceptible to electrostatic
discharge. In order to prevent damage, proper handling procedures must be followed during installation, (dis)connecting
and removing the electronics.
The equipment carries the CE-mark and is compliant with the concerning EMC requirements. However, EMC
requirements can only be met using appropriate cables and connector/gland assemblies.Cable wire diameters must be
sufficient to carry the supply current, and voltage loss must be kept as low as possible.
When connecting the product to other devices, be sure that the integrity of the shielding is not affected; always use
shielded cabling for signals and communication and do not use unshielded wire terminals.
When in doubt about the suitability of your cabling, contact your Bronkhorst representative.
Never power the instrument simultaneously from two different power sources (e.g. fieldbus connection and Plug-in
Power Supply). Doing so will blow the power line fuses on the wiring terminal box.
Always isolate the electrical power before connecting or disconnecting equipment.

Bronkhorst®
Instruction Manual MI Series Industrial mini CORI-FLOW™9.17.120D 17
3.2.1 Accessing wiring terminals
· The instrument cover may only be opened in a clean, dry and non-hazardous environment.
· Before opening the cover, make sure that the operating environment is perfectly safe and that the electrical components
cannot be affected by moisture or aggressive atmospheric components.
· Ensure that no particles, objects, etc. can fall into the instrument when the cover is open.
To connect an instrument with custom gland connectors, the cover has to
be removed in order to access the wiring terminal box. To remove the
cover, unscrew the 4 screws on top of the instrument with a size 4 hex key
and lift the cover from the instrument housing.
Refer to the applicable hook-up diagram for detailed wiring information.
A hook-up legend is also printed on the inside of the cover.
All wiring terminals are suitable for cables with a core diameter from 0.25 to 1.5 mm2.
· To ensure proper shielding, connect the cable shielding with the glands before re-installing them to the instrument
housing.
· For instruments with plastic cable glands, use the supplied clamps to connect the shielding to the metal base plate of the
wiring terminal box.

Bronkhorst®
Instruction Manual MI Series Industrial mini CORI-FLOW™ 9.17.120D18
4Operation
After correct installation and taking all necessary safety precautions, the MI Series can be used to measure and/or control
flow.
4.1 Powering up
After cleaning at high temperature, allow the instrument to return to ambient temperature before turning it on.
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 applying pressure, avoid pressure shocks and bring the fluid system gradually up to the level of the required
operating conditions; open the fluid supply gently.
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.
4.2 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 contaminants cannot be ruled out completely.
· In order to prevent undesired reactions, purging the instrument 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.
4.3 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).
4.4 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 even absolutely necessary before it is exposed to air.
· If the instrument 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 recommended minimum period of 30 minutes.
4.5 Powering down
· Prior to powering down the MI Series, the fluid system should be depressurized.
· When depressurizing, prevent sudden pressure changes, by shutting off the fluid supply gradually.

Bronkhorst®
Instruction Manual MI Series Industrial mini CORI-FLOW™9.17.120D 19
4.6 Valve Safe State
The MI Series Industrial mini CORI-FLOW™ can operate an external control valve, using the analog actuator output signal.
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). Taking into account the
typical process conditions under which the instrument is used (such as the processed media and ambient conditions; see
also Intended use), the default state is generally considered safe.
Check the serial number label or the technical specifications to see which valve type is used on your instrument (if
applicable).
4.7 Temperature considerations
Although the MI Series Industrial mini CORI-FLOW™ has excellent temperature stability, the best accuracy is achieved when
temperature gradients within and across the instrument are prevented. Observe the following attention points:
· Keep the media temperature as close as possible to the ambient temperature, and above the dew point of the ambient
air.
· Do not allow the media temperature to drop more than 10 °C below the ambient temperature or take measures to
prevent condensation.
· Always keep the media temperature above the freezing point.
· To prevent 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.
· Prevent temperature shocks; heating or cooling should amount to no more than 1 °C per second.
· The MI Series will show an amount of self heating, due to power dissipation of the electronics. Depending on media and
ambient temperature, this effect can be as large as 10 °C. 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 temperature.
· Heating and cooling effects also depend on the cooling/heat conductivity of the construction on which the instrument is
mounted.
· In normal operation mode, the fluid temperature should stay between -20 °C and 70 °C.
· The media temperature can be monitored with digital parameter Temperature.
4.7.1 Preventing condensation
In a moist environment, water condensate may precipitate on the measuring tube if the media temperature is significantly
lower than the ambient temperature. Condensed water increases the tube's mass, causing a density measurement error.
Continuous purging of the housing interior with a dry, inert gas like Nitrogen can help prevent condensation. Contact your
Bronkhorst representative for setting up an optimal purging configuration.
4.7.2 Cleaning temperature
The MI Series may be cleaned with high temperature fluids. The maximum allowable temperature of the cleaning media
depends on the ambient temperature:
· At ambient temperatures below 25 °C, the maximum allowable cleaning fluid temperature is 125 °C for a maximum of 30
minutes.
· At ambient temperatures from 25 °C, the maximum allowable cleaning fluid temperature is 105 °C for a maximum of 30
minutes.
· With cleaning fluid temperatures above 70 °C, the instrument must be powered off during the cleaning cycle.
· After cleaning at high temperature, allow the instrument to return to ambient temperature before turning it on.

Bronkhorst®
Instruction Manual MI Series Industrial mini CORI-FLOW™ 9.17.120D20
4.8 Communication
The following table lists the communication modes the MI Series can be fitted with (ex factory):
Connector/terminal
Type
Communication standard
Fieldbus/protocol
Main
Analog
0…5Vdc
0…10Vdc
0…20mA
4…20mA
n/a
Digital
RS-232
ProPar
RS-485
FLOW-BUS
Modbus (RTU/ASCII)
HART
HART
Fieldbus
Digital
RS-485
FLOW-BUS
Modbus (RTU/ASCII)
PROFIBUS DP
CAN
CANopen
DeviceNet™
Ethernet
PROFINET
EtherCAT®
EtherNet/IP
Modbus TCP
POWERLINK
PROFINET
Which communication modes are actually available on the instrument, is specified at ordering time:
· In analog mode, the instrument is set to the specified voltage/current range.
· The fieldbus connection only provides the specified fieldbus interface (if ordered).
· A digital interface on the main terminal is optional.
Simultaneous analog and digital operation
The instrument can be operated via the analog and the digital interface at the same time; analog signals and digital
parameters can be read (or changed) simultaneously. The instrument accepts a setpoint from either the analog or any of the
digital interfaces (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. The default control
mode (analog or digital) is selected at ordering time.
4.8.1 Analog operation
With analog operation the following signals are available:
· output signal: measured value
· input signal: setpoint (controller only)
Setpoints below 2% of the full scale will be interpreted as 0%.
4.8.2 Digital operation
Digital operation (e.g. via RS-232 or fieldbus) adds extra features to the instrument, such as:
· Direct reading with a readout/control module or host computer
· Diagnostics
· Multi-range functionality
· Device identification
· Secondary measurement outputs: density and temperature readout
· Adjustable minimum and maximum alarm limits (Alarms)
· (Batch) counter (Counter)
· No limitations on setpoint values below 2 %