BRONKHORST mini CORI-FLOW M1 Series User manual

Doc. no.: 9.17.050K Date: 23-07-2018
ATTENTION
Pleaseread this Instruction Manual carefully beforeinstalling and operating the instrument.
Not following the guidelines could resultin personal injury and/or damage to the equipment.
mini CORI-FLOW™ M1x series
Compact Coriolis Mass Flow
Meters/Controllers for Liquids and Gases
Instruction Manual

Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050K2
Disclaimer
The information in this manual has been reviewed and is believed to be wholly reliable. No responsibility, however, is
assumed for inaccuracies. The material in this manual is for information purposes only.
Copyright
© 2018 Bronkhorst High-Tech B.V.
All rights reserved. This documentation is protected by copyright.
Subject to technical and optical changes as well as printing errors. The information contained in this document is subject to
change at any time without prior notification. Bronkhorst High-Tech B.V. reserves the right to modify or improve its
products and modify the contents without being obliged to inform any particular persons or organizations. The device
specifications and the contents of the package may deviate from what is stated in this document.
Symbols
Important information. Disregarding this information could cause injuries to people or damage to the instrument or
installation.
Helpful information. This information will facilitate the use of the instrument and/or contribute to its optimal
performance.
Additional info available on the internet or from your local sales representative.
Receipt of equipment
Check the outside package box for damage incurred during shipment. If the box is damaged, then the local carrier must be
notified at once regarding his liability, if so required. At the same time a report should be submitted to your local sales
representative.
Carefully remove the equipment from the box. Verify that the equipment was not damaged during shipment. Should the
equipment be damaged, then the local carrier must be notified at once regarding his liability, if so required. At the same
time a report should be submitted to your local sales representative.
Check the packing list to ensure that you received all of the items within the scope of delivery.
Do not discard spare or replacement parts with the packaging material and inspect the contents for damage.
Refer to Removal and return instructions about return shipment procedures.
Equipment storage
The equipment should be stored in its original package in a cupboard warehouse or similar. Care should be taken not to
subject the equipment to excessive temperatures or humidity.

Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050K 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/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, however, if the product has been returned collect to
our factory or service center, these costs are added to the repair invoice. Import and/or export charges, foreign shipping
methods/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 is not allowed. There are no repairable parts inside. In case of a defect please return the equipment
to Bronkhorst High-Tech B.V.
One or more warning signs may be present on different parts of the product. These signs have the following meaning:
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. Other components that are
not safety related 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 relevance of a replacement component, contact Bronkhorst for information.

Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050K4

Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050K 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
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81.5 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
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Location 2.3.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Preventing resonance 2.3.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Fluidic connections 2.3.4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Piping requirements 2.3.5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.4 Preventing pressure shocks
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.5 Preventing hydraulic shocks
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142.6 Electrical connection
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Analog or local connection 2.6.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Digital RS232 connection 2.6.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Digital RS485 connection (fieldbus) 2.6.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15FLOW-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 and powering down
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173.2 First use
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173.3 Valve Safe State
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173.4 Mass flow measurement and control
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183.5 Temperature considerations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193.6 Manual controls
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19LED indications 3.6.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Multifunctional switch 3.6.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Normal operating functions 3.6.2.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Power-up functions 3.6.2.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Control mode - readout/change 3.6.2.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Network settings - readout/change 3.6.2.4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233.7 Communication modes
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Analog operation 3.7.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Digital RS232 operation 3.7.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24FlowDDE 3.7.2.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Software (DDE applications) 3.7.2.2

Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050K6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Fieldbus operation 3.7.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263.8 Adjusting zero point
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Manual procedure 3.8.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Digital procedure 3.8.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273.9 Checking calibration status
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283.10 Disabling multifunctional switch
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364.5 Fluid set
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38Advanced fluid set parameters 4.5.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 384.6 Controller
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404.7 Master/slave configuration (FLOW-BUS)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 414.8 Device identification
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 424.9 Special parameters
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43Default control mode 4.9.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Troubleshooting and service 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 445.1 Errors and warnings
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 445.2 Restoring factory settings
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 445.3 Common issues
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 475.4 Service
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Returns 6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 486.1 Removal and return instructions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 486.2 Disposal (end of lifetime)

Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050K 7
1Introduction
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 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).
The wetted materials incorporated in the 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 be sure to 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 suitability, intended use, cleaning and corrosion resistance of the
used materials against the applied media lies solely with the end user. Bronkhorst High-Tech B.V. cannot be held liable for
any damage resulting from improper use, use for other than the intended purpose or use of other media and/or conditions
than specified on the purchase order.
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.
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

Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050K8
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 RS232 interface or the fieldbus interface, or with a Bronkhorst® readout and
control unit (E-8000, BRIGHT). For RS232 communication, Bronkhorst can offer a special T-part RS232 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. Fluidic inlet (fitting type may differ,
depending on ordering details)
2. Manual control interface
3. Fieldbus connection (optional)
4. Power supply/analog interface/RS232
connection
5. Actuator output (optional)
6. Fluidic 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.
1.5 Calibration
The mini CORI-FLOW is factory calibrated. Bronkhorst certifies that the instrument meets the rated accuracy. Calibration is
performed using measurement standards traceable to the Dutch Metrology Institute (VSL).
Periodical inspection, recalibration or verification of the accuracy may be subject to individual requirements of the end user.
Unless specified otherwise, mini CORI-FLOW™ M1x instruments are H20 calibrated.

Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050K 9
1.6 Maintenance
No regular maintenance is required if the mini CORI-FLOW is 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 a non-aggressive and non-corrosive solvent.
In case of severe contamination, cleaning of the inside of the instrument and of the valve orifice (if applicable) may be
required.
Inexpertly servicing instruments can lead to serious personal injury and/or damage to the instrument or the system it is
used in. Therefore, servicing must be performed by trained and qualified personnel. Contact Bronkhorst for information
about cleaning and calibration. Bronkhorst has a trained staff available.
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/RS232
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
The documentation listed in the following table can be downloaded from
http://www.bronkhorst.com/en/downloads/
Type
Document
Document no.
General documentation
EU Declaration of Conformity
9.06.021
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 RS232 interface
9.17.027

Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050K10
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™ M1x9.17.050K 11
2Installation
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 Opened, 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 working process
conditions and outboard leak tested to at least 2 * 10-9 mbar l/s Helium. The tested pressure is specified
on the instrument with a red sticker. If this sticker is missing or if the specified pressure is insufficient,
the instrument must not be used and should be returned to the factory.
Before installation, make sure that the tested pressure is in accordance with the safety factor of your application. The tested
pressure must always be higher than the maximum operating pressure.
Disassembling the instrument and/or replacing parts of it will invalidate the pressure 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
For optimal performance, installation in a vibration free position is essential. Use the mounting holes in the bottom of the
instrument body (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 the supplied mounting block. This
mounting block has a mass and stiffness precisely tuned for the specific mini CORI-FLOW model and can be used as a base.
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.
2.3.1 Orientation
Generally, the reliability of a mini CORI-FLOW instrument is not affected by the mounting orientation.

Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050K12
2.3.2 Location
For gas applications, mount the instrument in a location where condensate (if any) cannot accumulate inside the
instrument's media conduits.
In liquid applications, the presence of gas bubbles in the liquid can cause
measuring errors. In general, the instrument should be mounted in a pipe
segment where gas bubbles (if any) 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 let the segment run empty; depending on the specific system
dimensions and the viscosity of the metered fluid, this effect might be stronger or weaker.
·If the instrument is part of a closed fluidic 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 Preventing resonance
If multiple mini CORI-FLOW™ M1x instruments will be used in the same fluidic system, observe the following guidelines:
Vibrations from the environment or from
one instrument might interfere with the
resonance frequency of another
instrument
To minimize resonance, isolate
instruments mechanically by mounting
them on individual rigid, stiff mounting
blocks. Preferably, mount multiple
instruments parallel to each other, and
use flexible piping.
Mass blocks can be isolated mechanically with (silicon) rubber suspension pads. Mounting blocks and suspension pads can
be obtained via your local Bronkhorst representative.
2.3.4 Fluidic connections
Flow direction
·Install the mini CORI-FLOW in the process line, in accordance with the direction of the FLOW arrow on the
base of the instrument.
·Tighten connections according to the instructions of the supplier of the fittings.

Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050K 13
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.
Check the fluidic system for leaks before applying pressure, especially if toxic, explosive or other dangerous fluids are used.
After using the mini CORI-FLOW for the first time with low temperature media, re-tighten the fluidic connections, in order
to prevent leakage.
2.3.5 Piping requirements
During the manufacturing process, the instrument has been tested with water. Despite the fact that it has been purged
thoroughly afterward, the instrument cannot be guaranteed to be absolutely free of water droplets upon delivery. For
applications where remaining water particles might cause undesired reactions, such as corrosion, Bronkhorst strongly
recommends performing an additional, adequate drying procedure, as described in Liquid application and Gas
application.
·Do not install small diameter piping on high flow rates and avoid abrupt angles or other disturbances within a distance
of 10 pipe diameters from the inlet or outlet of the device.
·Do not install pressure regulators within a distance of 25 pipe diameters.
2.4 Preventing pressure shocks
mini CORI-FLOW instruments 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) inlet pressure; put sufficient buffer volume between the 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 fluidic system where fluid movement (liquid or gas) is forced to stop or start suddenly (by a pump or a shut-off valve), a
hydraulic shocks(or fluid hammer) can occur, especially if the fluid velocity is high. This momentum change causes a
pressure surge (spike) traveling repeatedly from one end of the piping to the other. Rapid pressure fluctuations like this can
cause leakage and damage to fluidic 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
oAvoid large pipe diameter transitions by using piping and tubing with an inside diameter that matches that of the
instrument as closely as possible
oKeep the fluid velocity through the instrument as small 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 9.17.050K14
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.
The device contains electronic components that are susceptible to damage by electrostatic discharge. Proper handling
procedures must be followed during installation, (dis)connecting and removing the electronics.
The device described in this manual carries the CE-mark and is compliant with the concerning EMC requirements.
However, compliance with the EMC requirements is not possible without the use of proper cables and connector/gland
assemblies. Bronkhorst recommends the use of their standard cables. These cables have the right connectors and if loose
ends are used, these are marked to help prevent wrong connection. When using other cables, cable wire diameters should
be sufficient to carry the supply current, and voltage loss must be kept as low as possible. When in doubt, contact your
distributor.
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.
Never power the instrument simultaneously from two different power sources (e.g. fieldbus connection and Plug-in
Power Supply). Doing so will damage the printed circuit board irreparably.
Always power down the system before connecting or disconnecting instruments.
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.
2.6.2 Digital RS232 connection
Using a special T-part RS232 cable, the 8-pin DIN connector of the
instrument can be connected to a COM port or a USB port (via an
RS232/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™).

Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050K 15
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 RS232 communication with a third party micro controller device (e.g. a PLC, refer to the hook-up diagram for RS232
operation to connect the required signals).
2.6.3 Digital RS485 connection (fieldbus)
With digital communication over RS485 a fieldbus system with multiple
instruments can be set up. For all available fieldbus types except
PROFIBUS DP, the fieldbus connection is used to power and operate the
instrument. For PROFIBUS DP, the instrument needs to be powered
through the 8-pin DIN connector.
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 local Bronkhorst representative for
information.
2.6.3.1 FLOW-BUS
FLOW-BUS is a Bronkhorst® designed fieldbus, based on RS485 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)
·RS232 communication (ProPar) with Windows computer (local host)
·Connection of max. 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.

Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050K16
2.6.3.2 Modbus
Modbus is a 3-wire, RS485-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 max. 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 http://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, RS485-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.

Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050K 17
3Operation
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 and powering down
·It is recommended to turn on power before applying pressure and to switch off power after removing 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.
Be sure to apply the specified operating pressure(s). Avoid pressure shocks and bring the fluidic system gradually up to the
level of operating conditions; open and close the fluid supply gently.
3.2 First use
Adequate mass flow measurement is only possible if the fluid flows through the instrument in a single state (either gas or
liquid). To prevent 'slug flow' (two-phase flow) at start-up, take the following measures before starting measurement and
control:
·for liquid applications, expel gas from the system, by flushing the instrument and all fluidic lines with the process fluid at
a relatively high flow rate
·for gas applications, expel condensation from the system, by purging the instrument and all fluidic lines with a dry gas
at a relatively high flow rate
In systems for use with corrosive, reactive or explosive media, purging the fluidic lines of the device for at least 30 minutes
with a dry, inert gas (like Nitrogen or Argon) is absolutely necessary before use. After use with these media, complete
purging is also required before exposing the system to air.
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 Valve Safe State
When a controlling instrument is not powered, the control valve automatically returns to its 'Safe State', which is closed for
a 'normally closed' valve (n/c) and fully open for a 'normally opened' valve (n/o). To protect the system, certain events (such
as communication errors) may cause the instrument to switch to Valve Safe State (see also LED indications).
Check the serial number label or the technical specifications to see which valve type is used on your instrument (if
applicable).
3.4 Mass flow measurement and control
When powering up, the instrument needs a couple of seconds to start up the electronics. A soon as the start-up sequence is
finished (green LED glows continuously), the instrument is ready to measure mass flows, however, optimal accuracy is only
reached after warming up (see Powering up and powering down).
After powering up, the control valve closes (normally opened) or stays closed (normally closed). The valve stays closed until
the instrument receives a setpoint from the active setpoint source. The internal PID controller then immediately opens the
control valve, until the measured flow rate matches the setpoint. It maintains the resulting flow rate until another setpoint
is given.

Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050K18
3.5 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
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

Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x9.17.050K 19
3.6 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.
3.6.1 LED indications
• (green) Mode: operation mode indication
• (red) Error: error/warning messages
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
off
continuous
No error
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

Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050K20
• 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 to indicate its physical location
fast wink
0.1 sec on,
0.1 sec off
Selected action started (after releasing the multifunctional switch)
3.6.2 Multifunctional switch
Some special functions of the instrument 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.
3.6.2.1 Normal operating functions
·In order to access these functions, press and hold the switch while the instrument is in normal operation mode (green
LED glowing).
·As long as the switch is held, the LEDs show a repeating sequence of patterns, where each pattern indicates a function.
·All indications in this sequence are continuous.
·Each pattern is shown for a number of seconds; in the table below the column Hold time indicates the time frame within
the sequence where the LEDs show the associated pattern.
·To start a function, release the switch when the LEDs show the pattern of the required function.
•
(green)
•
(red)
Hold time
Function
•
•
0…1 sec
No action
•
•
1…4 sec
Reset alarm
•
•
4…8 sec
Reset instrument; clear all warnings and error messages and restart the instrument
•
•
8…12 sec
Auto-zero; re-adjust the zero-point of the instrument (flow meters/controllers)
•
•
12…16 sec
Enable FLASH mode for firmware update:
·the instrument shuts down and both LEDs turn 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.
Never perform this procedure before having taken notice of the instructions.