BRONKHORST mini CORI-FLOW ML120 User manual

Doc. no.: 9.17.097G Date: 09-01-2018
ATTENTION
Pleaseread this Instruction Manual carefully beforeinstalling and operating theinstrument.
Not following the guidelines could resultin personalinjury and/or damageto the equipment.
mini CORI-FLOW ML120
(Ultra) Low Flow
Coriolis Mass Flow Meters / Controllers
Instruction Manual

Bronkhorst®
Instruction Manual mini CORI-FLOW ML120 9.17.097G2
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 ML1209.17.097G 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 paragraph 9 of the Conditions of sales:
http://www.bronkhorst.com/files/corporate_headquarters/sales_conditions/en_general_terms_of_sales.pdf
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 of 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.

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Instruction Manual mini CORI-FLOW ML120 9.17.097G4

Bronkhorst®
Instruction Manual mini CORI-FLOW ML1209.17.097G 5
Table of contents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Introduction 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.1 Scope of this manual
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.2 Intended use
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.3 Product description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81.4 Calibration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81.5 Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81.6 Other documents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.7 Model key
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.8 Customized I/O options
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Starting up 2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122.1 Check properties
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122.2 Check operating conditions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Tested pressure 2.2.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Sealing material 2.2.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122.3 Piping requirements
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.4 Mounting
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.5 Leak check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.6 Electrical connection
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142.7 Communication interface
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Analog or local interface 2.7.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Digital RS232 interface 2.7.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15E-8000 2.7.2.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15BRIGHT 2.7.2.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Digital RS485 interface 2.7.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16FLOW-BUS 2.7.3.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Modbus 2.7.3.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Other fieldbuses 2.7.3.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172.8 Micro switch operation and LED indications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172.9 Purging before use
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172.10 Zeroing
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Zeroing using micro switch 2.10.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Zeroing through digital communication 2.10.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192.11 Powering up and powering down
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202.12 Temperature considerations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Operation 3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213.1 Mass flow measurement and control
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Instrument settings 3.1.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Valve safe state 3.1.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223.2 Analog operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223.3 Basic RS232 operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23FlowDDE 3.3.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Software (DDE applications) 3.3.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Baud rate, node address and parity 3.3.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253.4 Basic RS485 operation (FLOW-BUS/Modbus)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25FLOW-BUS 3.4.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Modbus 3.4.2

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Instruction Manual mini CORI-FLOW ML120 9.17.097G6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Software 3.4.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Baud rate, node address and parity 3.4.4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273.5 Other fieldbus configurations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273.6 LED indications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293.7 Multifunctional switch
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Digital parameters 4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324.1 General
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324.2 Device identification
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334.3 Measurement and control
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354.4 Alarms
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 374.5 Counter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 394.6 Network configuration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404.7 Special parameters
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Default control mode 4.7.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 424.8 Fluid set
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42Basic fluid set parameters 4.8.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43Advanced fluid set parameters 4.8.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Fluid mixture parameters 4.8.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 454.9 Master/slave configuration (FLOW-BUS)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 464.10 Controller
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Batch dosing with CORI-FILL™ 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495.1 Dosing principle
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49Proportional control 5.1.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49Preventing overshoot 5.1.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50Estimated dosing time 5.1.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 505.2 Process conditions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 505.3 Parameter settings
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51Dosing method 5.3.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52Batch settings 5.3.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53Overrun correction 5.3.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54Disabling filters 5.3.4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55Proportional control settings 5.3.5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57On/off control settings 5.3.6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 585.4 Optimizing hints
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Troubleshooting and service 6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 606.1 Restoring factory settings
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 606.2 Common issues
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 626.3 Service
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Removal and return instructions 7

Bronkhorst®
Instruction Manual mini CORI-FLOW ML1209.17.097G 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 ML120 series mass flow meters and controllers for liquids and gases.
1.2 Intended use
The Bronkhorst® series mini CORI-FLOW ML120 is an accurate mass-flow meter/controller for measuring gas and liquid
flows up to 200 bar(a) depending on body rating, virtually independent of pressure and temperature changes. The mini
CORI-FLOW is a real mass-flow meter/controller and measures the flow in mass, it does not matter what the properties of
the gases or liquids are. The system can be completed with an internal piezo control valve and a flexible readout unit to
measure and control gas and liquid flows.
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).
Responsibility for the use of the equipment with regard to suitability, intended use, cleaning and corrosion resistance of the
used materials against the metered media lies solely with the end user.
Bronkhorst High-Tech B.V. cannot be held liable for any damage resulting from improper use or use for other than the
intended purpose.
1.3 Product description
mini CORI-FLOW ML120 instruments by Bronkhorst® 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 (ultra) low flow market, from 5 g/h
up to 200 g/h (full scale values), the mini CO RI-FLOW offers multi-range functionality: factory calibrated ranges can be
rescaled by the user, maintaining the original accuracy specifications.
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, 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. Coriolis mass flow measurement is fast, accurate and inherently bi-directional. The mini CORI-FLOW
features density and temperature of the fluid as secondary outputs.
Multi-range
The mini CORI-FLOW ML120 offers multi-range functionality: factory calibrated ranges can be re-ranged to a different full
scale range (e..g. a mini CORI-FLOW model ML120 can be used for full scale ranges between 5 g/h and 200 g/h). The analog
output and the digital measured value are scaled accordingly.
Switching between ranges can be done using the RS232 interface or the fieldbus interface. For RS232 communication,
Bronkhorst offers free tooling software (FlowPlot).
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.

Bronkhorst®
Instruction Manual mini CORI-FLOW ML120 9.17.097G8
Accuracy
The accuracy of a mini CORI-FLOW is either 0.2% reading for liquids or 0.5% reading for gases.
This specification is 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. In all instruments
capable of density measurement there will be an automatic adjustment for change in density.
CORI-FILL™
mini CORI-FLOW instruments with firmware version 1.05g and up are equipped with CORI-FILL™ technology, designed for
fast and highly accurate mass or volume batch dosing of liquids or gases. The internal batch dosing controller is optimized
for controlling a valve or a (gear) pump, to deliver an exact batch dose, independent of fluid properties, ambient
temperature and back pressure.
1.4 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). Calibration certificates are
included in the scope of delivery.
Periodical inspection, recalibration or verification of the accuracy may be subject to individual requirements of the end user.
Unless specified otherwise, mini CORI-FLOW ML120 instruments are H20 calibrated.
1.5 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.
1.6 Other documents
Basic instructions
Dimensional drawings
Document 9.17.093
Quick installation guide mini CORI-FLOW ML120
Document 7.05.925
Dimensional drawing mini CORI-FLOW ML120
Advanced instructions
Hook-up diagrams
Document 9.17.024
Instruction manual FLOW-BUS interface
Document 9.16.132
Hook-up diagram ML Series instruments RS232 and Analog
Document 9.17.025
Instruction manual PROFIBUS DP interface
Document 9.16.133
Hook-up diagram ML Series instruments FLOW-BUS
Document 9.17.026
Instruction manual DeviceNet™ interface
Document 9.16.134
Hook-up diagram ML Series instruments PROFIBUS DP
Document 9.17.027
Instruction manual RS232 interface
Document 9.16.135
Hook-up diagram ML Series instruments DeviceNet™
Document 9.17.035
Instruction manual Modbus interface
Document 9.16.136
Hook-up diagram ML Series instruments Modbus
Document 9.17.063
Instruction manual EtherCAT® interface
Document 9.16.137
Hook-up diagram ML Series instruments EtherCAT®

Bronkhorst®
Instruction Manual mini CORI-FLOW ML1209.17.097G 9
Advanced instructions
Hook-up diagrams
Document 9.17.095
Instruction manual PROFINET interface
Document 9.16.146
Hook-up diagram ML Series instruments PROFINET
Document 9.16.118
Hook-up diagram LAB MBC3 Custom bus & IO configurations
All documents referred to in this manual can be downloaded from http://www.bronkhorst.com/en/downloads
1.7 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.
1.8 Customized I/O options
mini CORI-FLOW ML120 instruments offer several customized input/output functions through pin 5 of the M12 connector
as an option. The required I/O options are factory installed as specified at ordering time, and cannot be changed manually.
The possible configurations are described in the table below. See the hook-up diagram for custom bus and I/O
configurations (document 9.16.118) for an explanation of the codes.
Code
Description
000
Disabled, pin 5 is pulled down to 0 Vdc (default selection)
A1V
0…10 Vdc 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 (only applicable to mass flow
meters with the controller function enabled), make sure to set parameter Valve maximum to 0.3 [A]. For mass
flow controllers, the controller output signal represents the valve actuator current. This output is limited to
a value below 10 Vdc, due to the maximum valve current restriction.

Bronkhorst®
Instruction Manual mini CORI-FLOW ML120 9.17.097G10
Code
Description
B1V
4…20 mA 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 (only applicable to mass flow
meters with the controller function enabled), make sure to set parameter Valve maximum to 0.3 [A]. For mass
flow controllers, the controller output signal represents the valve actuator current. This output is limited to
a value below 20mA, due to the maximum valve current restriction.
C3A
Digital output, min/max alarm
During a min/max alarm, pin 5 is pulled down to 0 Vdc.
C4A
Digital output, counter alarm
During a counter alarm, pin 5 is pulled down to 0 Vdc.
C5S
Example for C5S or C0I hook-up
Digital output, enabled by setpoint (for shut-off control)
Pin 5 is pulled down to 0 Vdc at a controller setpoint, e.g. for shut-off
valve activation.
For factory selected analog control (…-A#-C5S):
If parameter Control mode is set for analog control by factory, the
minimum setpoint at which the device (shut-off valve) connected to pin 5
is activated is 1.9%. This prevents possible noise on the analog input
activating the device accidentally.
For factory selected digital control (…-D#-C5S):
If parameter Control mode is set for digital control by factory, the setpoint threshold for activating the
device connected to pin 5 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 pin 5 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. Cable 7.03.572 (T-
part 9-pin D-sub/loose end) or 7.03.603 (T-part 9-pin D-sub/DIN43650C) can be used for this operating
option.
C0I
Digital output, high/low switch via remote parameter (e.g. for shut-off valve control)
Pin 5 is pulled down to 0 Vdc when writing value 1 to parameter IO switch status, this is undone by writing
value 0.
A device connected to pin 5 (e.g. a shut-off valve) can be activated/deactivated 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 pin 5 will be closed when the (n/c) controller is in ‘Valve Safe State’.
Make sure to use 24 Vdc power supply corresponding to the shut-off valve specifications. Cable 7.03.572 (T-
part 9-pin D-sub/loose end) or 7.03.603 (T-part 9-pin D-sub/DIN43650C) can be used for this operating
option.
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.

Bronkhorst®
Instruction Manual mini CORI-FLOW ML1209.17.097G 11
Code
Description
F9B
Example for F9B hook-up
Digital pulse output, batch counter
Pin 5 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…10 kOhm to create 15…24 Vdc at pin 5 (according to the applicable hook-up
diagram).
I3C
Digital input, controller mode valve close
Valve closes when pin 5 is connected to 0 Vdc.
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/RS232), 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 pin 5 is connected to 0 Vdc.
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/RS232), when the default Control mode is analog,
the default value is 1 (Analog input).
I1R
Example for I1R or I2R hook-up
Digital input, reset counter
The counter resets when pin 5 is connected to 0 Vdc.
I2R
Digital input, reset alarm
The alarm resets when pin 5 is connected to 0 Vdc.

Bronkhorst®
Instruction Manual mini CORI-FLOW ML120 9.17.097G12
2Starting up
2.1 Check properties
Before installing your mini CORI-FLOW ML120, check the label on the rear side of the instrument to
see if the functional properties match your requirements:
·Flow rate
·Fluid to be measured
·Up- and downstream pressures
·Temperature
·Valve type (NO= Normally Opened)
·Input/output signal (see also Electrical connection)
The Lab-style instrument housing is rated at IP40.
2.2 Check operating conditions
2.2.1 Tested pressure
Each CORI-FLOW is pressure tested to at least 1.7 times the working pressure of the process conditions provided by the
customer, with a minimum of 340 bar(a) for meters and 8.5 bar(a) for controllers. Each instrument is helium leak tested to at
least 2*10-9 mbar l/s Helium outboard.
The tested pressure is stated on the instrument with a red sticker. Check this test
pressure before installing the instrument in the application. If the sticker is not
available or the test pressure is incorrect, the instrument should not be mounted
in the process line and be returned to the factory.
The tested pressure should always be higher than the maximum operating
pressure.
Mass Flow Meter
Mass Flow Controller
2.2.2 Sealing material
mini CORI-FLOW ML120 instruments are equipped 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. Do
not exceed the indicated maximum operating pressure and temperature. Bronkhorst High-Tech B.V. cannot be held
responsible for any damage resulting from the use of other media and/or conditions than specified at ordering time.
mini CORI-FLOW ML120V00 instruments are metal sealed.
mini CORI-FLOW ML120V21 instruments are equipped ex factory with internal sealings in the piezo-valve, compatible with
the media specified at ordering time. As a factory standard, the instruments are provided with Kalrez® (FFKM) seals.
2.3 Piping requirements
MAKE SURE THAT THE PIPING IS ABSOLUTELY CLEAN!
Particles can damage or clog the instrument. The piezo valve’s metal membrame can be seriously damaged by particles in
the fluid.
During the manufacturing process, the instruments have been tested with water. Despite the fact that the instruments have
been purged thoroughly afterward, the delivered instruments cannot be guaranteed to be absolutely free of water droplets.
Bronkhorst strongly recommends performing an additional, adequate drying procedure for those applications where
remaining water particles may cause undesired reactions such as corrosion.

Bronkhorst®
Instruction Manual mini CORI-FLOW ML1209.17.097G 13
2.4 Mounting
For the mini CORI-FLOW ML120 proper stable mounting is strongly advised on
a rigid, solid base for optimal accuracy. For optimal isolation from vibrations in
the area, rubber suspension pads can be used.
The picture to the right shows an example of a mini CORI-FLOW ML120 with a
mass block, one of the options Bronkhorst can provide for isolation from
vibrations in the environment where the instrument is used.
Please see Quick Installation Guide, document no 9.17.093 for more detailed information about mounting.
2.5 Leak check
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 that no dirt or dust is present on tube, ferrules or fittings. Tighten the nut finger-tight; while holding the
instrument and then tighten the nut 1 turn.
If applicable follow the guidelines of the supplier of the fittings. Special types of fittings are available on request.
Check the system for leaks before applying pressure, especially if toxic, explosive or other dangerous fluids are used.
2.6 Electrical connection
Electrical connection must be made with standard cables or according to the applicable hook-up diagrams. The factory
installed 9-pin D-sub settings are indicated on the instrument label. Make sure that the power supply is suitable for the
power ratings as indicated on the instrument label and that double or reinforced insulation is used for the power supply.
Bronkhorst recommends using their standard cables. These cables have the right connectors and if loose ends are used,
these are marked to prevent wrong connection.
Hook-up diagrams for MLxxx series instruments can be found at http://www.bronkhorst.com/en/downloads
mini CORI-FLOW ML120 series instruments are powered with +15…+24 Vdc. See the hook-up and cabling examples in
section Communication interface
Do not 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.
The device contains electronic components that are susceptible to damage by electrostatic discharge. Proper handling
procedures must be taken during installation, removing and connecting 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 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 (for instance a PLC), be sure that the integrity of the shielding is not affected.
Do not use unshielded wire terminals.

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Instruction Manual mini CORI-FLOW ML120 9.17.097G14
2.7 Communication interface
The table below shows the different (fieldbus) interfaces that can be installed. LED indications and the use of the micro
switch button on top of the instrument are explained in LED indications and Multifunctional switch respectively.
Analog/RS232
An analog and (digital) RS232 interface are always available on mini CORI-FLOW ML120 series instruments. A fieldbus
interface is optional.
·The analog and RS232 interface are made available through a 9-pin D-sub connector on the side of the instrument
osee Analog or local interface and Digital RS232 interface
·FLOW-BUS and Modbus communication is possible through the 9-pin D-sub side connector, as well as via an optional
fieldbus connector on the top of the instrument
osee Digital RS485 interface
·All other fieldbus interfaces are strictly made available through a connector on top of the instrument
osee Digital RS485 interface
2.7.1 Analog or local interface
Connect the ML120 series instrument to the power supply/readout unit using a cable with 9-pin D-sub connector according
to the Bronkhorst® standard for the Sub-D9 connector.
Refer to the hook-up diagram for analog operation (document 9.16.119) or use a 9-pin D-sub loose-end cable (7.03.004 (3m),
7.03.536 (5m) or 7.03.537 (10m)) to connect the required signals.
Power
Analog output
Analog input
(controller)
: +15...+24 Vdc
: 0...5 Vdc / 0...10 Vdc
0...20 mA / 4...20 mA
: 0...5 Vdc / 0...10 Vdc
0...20 mA / 4...20
mA
The following analog signals are available through the 9-pin D-sub side connector:
·Pin 2: measured value (analog output)
·Pin 3: setpoint (analog input)
The factory selected analog interface (0…5 Vdc; 0…10 Vdc; 0…20 mA or 4…20 mA) can be found in the model key of the
instrument (see Model key) and in the pin description on the instrument label.
When operating the instrument through the analog interface it is possible to connect the instrument simultaneously to
RS232 for reading/changing parameters (e.g. settings or fluid selection).

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Instruction Manual mini CORI-FLOW ML1209.17.097G 15
2.7.2 Digital RS232 interface
A special T-part cable (7.03.366) is required for connecting the
9-pin D-sub side connector of an mini CORI-FLOW ML120
series instrument to a COM port of a Windows computer for
RS232 communication. Optionally use an RS232 to USB2.0
converter (9.09.122) to connect to a USB port. Use a Plug-in
Power Supply (PiPS) (7.03.422) for powering the instrument.
Alternatively use a 9-pin D-sub loose-end cable and refer to
the hook-up diagram for RS232 operation (document 9.16.119)
to connect the required signals, typically for connection to a
PLC or micro controller device.
If an instrument is powered through the (optional) bus
connector on top of the instrument, the 9-pin D-sub side
connector can be connected to a COM port directly, using the
T-part cable 7.03.366 or a RS232 cable 7.03.367. The figure on
the right shows a hook-up example for DeviceNet™.
Keep in mind that the 9-pin D-sub configuration of a Bronkhorst® instrument differs from the 9-pin D-sub configuration of
a PC COM-port. Make sure the correct cables are used for hook-up. When in doubt, always check the hook-up diagrams
associated with the instruments.
A PiPS (Plug-in Power Supply, art.nr.: 7.03.422) is available to power a single instrument and can be used instead of the
DB9 loose-end cable as shown in the example above. Detailed information can be found in the manual PiPS (9.17.055),
which can be downloaded from http://www.bronkhorst.com/en/downloads
See document 9.17.027 - Instruction manual RS232 interface for more information about hook-up and
communication.
2.7.2.1 E-8000
When a mini CORI-FLOW ML120 instrument is used in
combination with an E-8000 readout/ control unit equipped
with an RS232 interface, the instrument can be powered and
operated using the 9-pin D-sub (female) connector at the rear
of the E-8000 module and a cable 7.03.016 or equivalent. With
the display interface and control buttons most digital
parameters can be used. See the E-8000 manual (document
9.17.076) for more information.
2.7.2.2 BRIGHT
When a mini CORI-FLOW ML120 instrument is used in
combination with a BRIGHT readout and control module, most
digital functions are available by using the display interface
and control buttons. If a BRIGHT module is connected, no other
RS232 communication with the instrument can be established.
For more information see the BRIGHT manual (document
9.17.048).
2.7.3 Digital RS485 interface
With digital operation over RS485 or Ethernet a fieldbus system with multiple instruments can be set up. This section shows
examples of several of mini CORI-FLOW ML120 Series instruments in an RS485 fieldbus system. Note that many other bus
configurations are possible, contact your local sales representative for more information. Please check the total power
consumption of your instruments and do not exceed the maximum power of the power supply.
For all fieldbus systems the mini CORI-FLOW ML120 instruments serve as slaves on the master/slave bus system. There is no
mutual communication between slaves, only between master and slave.

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Instruction Manual mini CORI-FLOW ML120 9.17.097G16
2.7.3.1 FLOW-BUS
In the image below an E-8000 power supply/readout control unit with FLOW-BUS interface is connected to two mini CORI-
FLOW ML120 Series instruments via the RJ-45 top-connector FLOW-BUS interface. In this example one instrument serves as
'local host' for communicating with a Windows computer to all instruments on the bus via an available RS232 connector.
Note: communication with all the instruments on the FLOW-BUS system is possible when using an mini CORI-FLOW ML120
Series instrument as local-host RS232/FLOW-BUS interface. It is also possible to use multiple local-host RS232/FLOW-BUS
interfaces in a FLOW-BUS system simultaneously.
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 9-pin D-sub connector on one of the digital instruments.
See document 9.17.024 - Instruction manual FLOW-BUS interface for more information about hook-up and
communication.
2.7.3.2 Modbus
In the example below the Modbus power supply is provided by an E-8000. The instruments are connected to the bus via
RS485 cables with RJ-45 connector and a Multiport connector. The RS485 - USB2.0 adapter can be used to connect the system
to a Modbus master device.
·See document 9.17.035 - Instruction manual Modbus for more information about hook-up and communication.
·See document 9.17.076 - Instruction manual E-8000 for more information about power supply and communication
options of the E-8000.

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Instruction Manual mini CORI-FLOW ML1209.17.097G 17
2.7.3.3 Other fieldbuses
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.
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.
EtherCAT®
Ethernet for Control Automation Technology (EtherCAT®) is an open high performance Ethernet based fieldbus system.
Consult Instruction manual EtherCAT® interface (document no. 9.17.063) for more information about setting up an
EtherCAT® network.
PROFINET
The PROFINET interface is 100% Ethernet compatible and is used for data exchange between I/O controllers (PLC, etc.) and
I/O devices (slaves, field devices). PROFINET uses the proven communication model and application view of PROFIBUS DP.
Consult Instruction manual PROFINET interface (document no. 9.17.095) for more information about setting up a
PROFINET network.
2.8 Micro switch operation and LED indications
Using the two colored LEDs and the micro switch on the ML120 series,
several actions can be monitored and started.
·The green • LED is used for status indication.
·The red • LED is used for errors, warnings and messages.
·The switch can be used to start several actions, such as auto-zero,
restore factory settings and bus-initialization actions, if applicable.
For the zero-procedure see Zeroing.
For an overview of all possible LED indications, see LED indications.
The micro switch on top of the mini CORI-FLOW ML120 series can be operated with a thin, metal or hard plastic pin, e.g.
the end of a paperclip. Avoid excessive force when operating the switch.
2.9 Purging before use
In systems for use with corrosive, reactive or explosive media, purging for at least 30 minutes with a dry, inert gas (like
Nitrogen or Argon) is absolutely necessary before use. After use with corrosive or reactive fluids, complete purging is also
required before exposing the system to air.
Prevent chemical reactions inside the tubes or instrument as this will tend to clog up or corrode the system.
2.10 Zeroing
Zeroing of a mini CORI-FLOW instrument is required each time process conditions have been changed.

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Instruction Manual mini CORI-FLOW ML120 9.17.097G18
What is zero-stability?
Due to mechanical construction of the sensor tubes each mini CORI-FLOW sensor will have a very small offset signal, even
when the mass flow is zero. This is called the zero-stability error and is specified for accuracy separately for all Coriolis
instruments. Main reason for this is the fact that this error can be (temporarily) neutralized after performing a zero-action.
Immediately after zeroing, zero-stability error is 0%. However, it is allowed to move between a certain band depending on
the environment (process) and fluid conditions.
In ideal situations, where actual process conditions do not change, this error will remain the same.
See below for possible reasons of change of zero-stability.
Model*
DN (mm)
Zero-stability
Nominal flow
ML120
0.25
< 0.01 g/h
100 g/h
* Zero-stability depends on the (mini) CORI-FLOW model
In practice zero-stability turns out to be better than the values in the table, but for calculation we will take worst case
values.
Process conditions
Each time process conditions have been changed significantly a (mini) CORI-FLOW needs to be zeroed in order to get rid of
the offset error due to zero-stability. At least the very first time an instrument is used a zero procedure will be required.
The zero-stability error will mainly change when one or more of the following items change significantly:
·Temperature (of fluid or environment)
·Mounting of the (mini) CORI-FLOW instrument
Less important items:
·Pressure
·Density of fluid
·Vibrations working on instrument via environment
·Pulsation of supply pressure working on instrument
Zero Procedure
There are two ways to perform zeroing of a (mini) CORI-FLOW instrument:
1. With the micro-switch
2. Through digital communication
Always make sure that there is absolutely no flow when the instrument is performing the (auto-)zero procedure and there
are no mechanical vibrations or pulsating inlet pressures.
If the instrument has problems finding a proper and stable zero, it will repeat the auto-zero procedure up to 4 times. Each
time when no proper zero can be achieved, the instrument will give a short notice, signaling its LEDs after the procedure.
The red and green LED will blink alternating for a few seconds to indicate that the auto-zero was not able to find a zero
point (because of too much noise in the signal). This is mostly the case when the instrument is placed in a vibrating
environment. When ready zeroing after trying max. 4 times, the final result for the zero value will be a moving average
value of all attempts. The instrument will save this zero value into its non-volatile memory and will keep this value until the
next zero-procedure is performed. The mini CORI-FLOW will accept a proper zero point only if the measured signal is within
a limited noise band. Best way to achieve this is to avoid external noise influences. However, when this is not possible, filter
settings of the mini CORI-FLOW can be changed to improve noise immunity.
2.10.1 Zeroing using micro switch
The zero-point of each instrument is factory adjusted. If so required the zero point may be re-adjusted
over RS232, fieldbus or by means of using the micro switch.
Procedure for zeroing by micro switch:
1. Set process conditions
Warm-up (for a minimum of 30 minutes), pressurize the system and fill the instrument according to the process
conditions.
2. Stop flow
Make sure no flow is going through the instrument by closing valves near the instrument. The setpoint must be zero.

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Instruction Manual mini CORI-FLOW ML1209.17.097G 19
3. Press and hold, until the GREEN LED is on, then release button
Press the micro switch and hold it. After a short time the red • LED will go ON and OFF, then the green • LED will go
ON. At that moment (which is 8...12 s after pressing) release the switch.
4. Zeroing
The zeroing procedure will start at that moment and the green • LED will blink fast. The procedure will take
approximately 60 seconds.
5. Ready
When the indication is showing 0% signal and the green • indication LED is glowing continuously again, the zeroing
action was successful.
2.10.2 Zeroing through digital communication
It is also possible to start the zero adjustment procedure through digital communication:
·Through FLOW-BUS, using an E-8000 readout/control module
·Through FLOW-BUS, via a RS232/FLOW-BUS converter using software on a PC or PLC
·Through RS232, using software on a Windows computer or a PLC
·Through RS232, using a BRIGHT compact local readout/control module
·Through other fieldbus system (PROFIBUS DP/DeviceNet™/Modbus)
1. Set process conditions
Warm up and pressurize the system and fill the instrument according to the process conditions.
2. Stop flow
Make sure there is no flow through the instrument by closing the shut-off valves before and after the instrument.
3. Send parameters
Send the following parameter values in this sequence:
oInit Reset: 64
oControl Mode: 9
oCalibration Mode: 255
oCalibration Mode: 0
oCalibration Mode: 9
4. Zeroing
The zeroing procedure will start at that moment and the green LED will blink fast. The zeroing procedure waits for a
stable signal and saves the zero. If the signal is not stable zeroing, it will take a long time and the nearest point to zero
is accepted. The procedure will take approximately 60 seconds.
Make sure there is no flow through the instrument when performing the zeroing procedure.
5. Ready
When indication is showing 0% signal and the green indication LED is glowing continuously again, then zeroing has
succeeded. Parameter Control Mode reverts to its original value. As last send 0 to parameter Init Reset.
2.11 Powering up and powering down
·For best accuracy, allow the mini CORI-FLOW 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.
·It is recommended to turn on power before applying pressure and to switch off power after removing pressure.
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.
Make sure (in case of a controller) that the used control valve can withstand the system pressure and the maximum delta
pressure allowed.

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Instruction Manual mini CORI-FLOW ML120 9.17.097G20
2.12 Temperature considerations
The mini CORI-FLOW has to be installed in such a way that levels of different temperature within the instrument are
avoided. Avoid simultaneous heating and cooling of the instrument. Temperature shocks have to be avoided in any case
(max. 1°C/sec). After using the mini CORI-FLOW for the first time at low temperature, tighten the fluidic connections again in
order to prevent leakage.
If the equipment is not properly serviced, serious personal injury and/or damage to the equipment could be the result. It is
therefore important that servicing is performed by trained and qualified personnel.
In practice, there will be a balance between fluid temperature, self heating, cooling effects and ambient temperature at the
instrument. If the fluid is really hot, it would help if the instrument is in a cool environment. It will also depend on how well
the installation on which the instrument has been mounted is capable of cooling.
Make sure the temperature in the housing does not exceed 70°C, otherwise the electronics might get damaged. To check
this, the internal temperature sensor can be used (e.g. via FlowDDE or a readout and control unit (E-8000 or BRIGHT)).
Below some facts about maximum T ambient and T fluid :
Operating temperature conditions (continuous):
·Tfluid + Tambient < 110°C With:
·Tfluid < 100 °C
·Tambient < 55°C
For cleaning purpose, instrument without power
(continuous):
·Tfluid + Tambient < 130°C With:
·Tfluid < 130°C
·T ambient < 80°C
In all situations:
·Tfluid > 0°C
·Tambient > 0°C
·Storage temperature (dry tube) [-30 .. 80]°C