BRONKHORST mini CORI-FLOW ML120 User manual

Doc. no.: 9.17.097E Date: 18-05-2016
Instruction Manual
Pleaseread this Instruction Manual carefully before installing and operating the instrument. Not
following the guidelines could result in personal injury and/or damage to theequipment.
ATTENTION
mini CORI-FLOW ML120
(Ultra)Low Flow Coriolis
Mass Flow Meters / Controllers

mini CORI-FLOW ML120 9.17.097
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
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® 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. Discardingthisinformationcouldcause injuriesto peopleor damageto theinstrument or
installation.
Helpful information. Thisinformationwill facilitatethe useofthisinstrument.
Additional infoavailableontheinternet or from your local sales representative.
Receipt of equipment
Check the outside packing box for damage incurred during shipment. When the packing 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 packing 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.
Checkthepackinglist toensurethat you receivedall oftheitems.
Do not discardspare or replacement partswith thepackingmaterial andinspect thecontents for damage.
Refer to "Removal and return instructions" about return shipment procedures.
Equipment storage
The equipment should be stored in its original packing in a cupboard warehouse or similar. Care should be taken not to
subject the equipment to excessive temperatures or humidity.
Bronkhorst®
2

Bronkhorst®
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 subjected 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 paragraph9 oftheConditionsofsales:
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 undeterminable 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® 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.
Safety Precautions
The following safety precautions should be observed before using this product and any associated instrumentation.
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, test leads, cracks, or breaks before each use.
The module and accessories must be used in accordance with its specifications and operating instructions or 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.
The symbol on an instrument indicates that the user should refer to the operating instructions located in the manual.
Surfaces near the symbol may be hot.
To maintain protection from electric shock and fire, replacement components must be obtained from © 2015 Bronkhorst
High-Tech BV 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. (Note that selected parts should be obtained only through Bronkhorst® to maintain accuracy and
functionality of the product.) If you are unsure about the applicability of a replacement component, call a Bronkhorst® office
for information.
3mini CORI-FLOW ML1209.17.097

Bronkhorst®
9.17.097mini CORI-FLOW ML1204
Table of contents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Scope of this manual1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61.1 Introduction
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61.2 Intended use
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61.3 Product description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.4 References to other applicable documents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.5 Model key
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Starting up2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.1 Check functional properties
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.2 Check operating conditions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Rated pressure test inspection2.2.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Seals2.2.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Environmental ratings2.2.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.3 Piping requirements
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.4 Instrument mounting
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.5 Leak Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.6 Electrical connection
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102.7 Analog / digital operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Analog / local operation2.7.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Digital RS232 operation2.7.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Digital RS485 / bus operation2.7.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112.8 Micro switch operation and LED indication
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112.9 Zeroing
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Zeroing using micro switch2.9.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Zeroing through digital communication2.9.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.10 Purging
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.11 Supply pressure
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.12 Calibration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.13 Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142.14 Temperature considerations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Basic operations3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153.1 Mass flow measurement and control
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Changing control, range and operating conditions3.1.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Valve Safe State3.1.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163.2 Communication interfaces
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Using multiple interfaces3.2.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173.3 Analog operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Hook-up3.3.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173.4 Basic RS232 operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Hook-up3.4.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18E-80003.4.1.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18BRIGHT3.4.1.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18FlowDDE3.4.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Software3.4.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Baud rate setup3.4.4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Basic RS485 (FLOW-BUS/Modbus) operation3.4.5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20FLOW-BUS3.4.5.1

Bronkhorst®
5mini CORI-FLOW ML1209.17.097
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Modbus3.4.5.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Hook-up3.4.6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Software3.4.7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Baud rate, node address and parity setup3.4.8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223.5 Other field bus configurations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Hook-up3.5.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Baud rate, node address and parity setup3.5.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243.6 LED indications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253.7 Micro switch functions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263.8 Basic parameters and properties
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Introduction3.8.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Basic identification parameters3.8.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Basic alarm and counter settings3.8.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Zeroing (using digital operation)3.8.4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Instrument parameter list3.8.5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Basic measurement and control parameters3.8.6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Advanced operation4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324.1 Advanced parameters and properties
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Advanced measurement and control parameters4.1.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Special instrument parameters4.1.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Advanced fluidset, range and operating conditions parameters4.1.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38Advanced alarm parameters4.1.4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Advanced counter parameters4.1.5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 414.2 Field bus operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41FLOW-BUS master/slave controller operation4.2.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42Changing baud rate, node address and parity4.2.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 444.3 Special instrument features
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44Customized IO options (pin 5)4.3.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46Changing default control mode4.3.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46Troubleshooting and service5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 465.1 Diagnostics
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 475.2 Troubleshooting
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495.3 Service
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50Removal and return instructions6

Bronkhorst®
9.17.097mini CORI-FLOW ML1206
1Scope of this manual
1.1 Introduction
This manual covers the general part of digital mini CORI-FLOW ML120 mass flow instruments for gases and liquids. It treats
the general instructions needed for the instruments. More information can be found in other documents.
1.2 Intended use
Mini CORI-FLOW ML120 series 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 ML120 offers “multi-range” functionality: factory calibrated ranges can be rescaled by the
user, maintaining the original accuracy specs.
1.3 Product description
The Bronkhorst® series mini CORI-FLOW ML120 is a mass-flow meter/controller and is an accurate device for measuring gas
and liquid flows up to 200 bara 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.
Instruments of the miniCORI-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 pc-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 miniCORI-FLOW features density and
temperature of the fluid as secondary outputs.
Multi-rangeinstrument
Thanks to extremely high linearity of the sensor, (mini) CORI-FLOW instruments can be easily re-ranged to a different full
scale range (100% point). The analog output and the digital measured flow value will be scaled to this FS 100% point.
E.g. an ML120 can be used for a full scale between 5 g/h and 200 g/h.
Switching between these ranges can be realized using fieldbus, E-8000, Bright module or RS232 interface. There is free
tooling software (FlowPlot) available for this purpose. (mini) CORI-FLOW instruments will get a calibration certificate for all
possible FS ranges. The actual FS of the instrument is set to a value wanted by the customer and can be found on the gray
label on the instrument.
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.). If the instrument will be used on volume flow (e.g. l/h, ml/min,
etc) this will introduce an extra inaccuracy, based on the actual density (measurement). In all instruments capable of density
measurement there will be an automatic adjustment for change in density.

Bronkhorst®
7mini CORI-FLOW ML1209.17.097
1.4 References to other applicable documents
Basicinstructions
Dimensional drawings
Document9.17.093
Quick installation guide mini CORI-FLOW ML120
Document7.05.925
Dimensional drawing miniCORI-FLOW ML120
Advancedinstructions
Hook-up diagrams
Document9.17.024
Instruction manual FLOW-BUS interface
Document9.16.132
Hook-up diagram ML Series instruments RS232 and Analog
Document9.17.025
Instruction manual PROFIBUS DP interface
Document9.16.133
Hook-up diagram ML Series instruments FLOW-BUS
Document9.17.026
Instruction manual DeviceNetTM interface
Document9.16.134
Hook-up diagram ML Series instruments PROFIBUS DP
Document9.17.027
Instruction manual RS232 interface
Document9.16.135
Hook-up diagram ML Series instruments DeviceNetTM
Document9.17.035
Instruction manual Modbus interface
Document9.16.136
Hook-up diagram ML Series instruments Modbus
Document9.17.063
Instruction manual EtherCAT® interface
Document9.16.137
Hook-up diagram ML Series instruments EtherCAT®
Document9.17.095
Instruction manual PROFINET interface
Document9.16.146
Hook-up diagram ML Series instruments PROFINET
Document9.16.118
Hook-up diagram LAB MBC3 Custom bus & IO configurations
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Thesedocumentscanbefoundat: http://www.bronkhorst.com/en/downloads
1.5 Model key

Bronkhorst®
9.17.097mini CORI-FLOW ML1208
2Starting up
2.1 Check functional properties
Before installing your mini CORI-FLOW ML120 Coriolis mass flow meter/controller it
is important to read the label on the backside of the instrument and check:
·Flow rate
·Fluid to be measured
·Up- and downstream pressures
·Temperature
·Valve type (NO= Normally Opened)
·Input/output signal (see also section 2.6)
2.2 Check operating conditions
2.2.1 Rated pressure test inspection
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.
Thetestedpressureis statedontheinstrument witha RED COLOURED sticker.
Checkthistest pressurebeforeinstalling theinstrument inthe application. Ifthe
sticker isnot availableor thetest pressureisincorrect, theinstrument shouldnot
bemountedintheprocesslineandbereturnedtothefactory.
NOTE!Tested pressure is higher than the maximum operating pressure.
Mass Flow Meter
Mass Flow Controller
2.2.2 Seals
miniCORI-FLOW ML120 instruments are equipped with seals (O-rings, gaskets or plungers), compatible with the gas or
liquid type(s) specified at the ordering form. If another liquid or gas is used, always make sure that the specified seals are
compatible with this fluid.
Bronkhorst® cannot beheld responsiblefor any damagescausedbytheuser, applying theinstrumentsfor fluidsthat were
not specifiedduringpurchase, or causedbyexceedingtheindicated maximum operatingpressure/temperature.
2.2.3 Environmental ratings
Each instrument housing style incorporates several provisions to comply with EMC requirements valid for these
instruments. The Lab-style instrument housing is rated at IP40.
Conditions for compliancewith EMC requirements
Compliance with the EMC requirements is not possible without the use of proper cables and connector/gland assemblies.
For good results Bronkhorst® can provide standard cables. Otherwise follow the guidelines as stated in section 2.6 Electrical
connection.
2.3 Piping requirements
MAKESURE THAT THE PIPING IS ABSOLUTELY CLEAN! Particlescandamage or clogtheinstrument. Thepiezovalve’s
metal membrame canbeseriously damagedbyparticles in thefluid.
Warning!
During the manufacturingprocess, theinstrumentshavebeen tested withwater. Despite thefact that theinstrumentshave
beenpurgedthoroughly afterwards, we cannot guaranteethat the deliveredinstrumentsareabsolutely freefrom water
droplets. Bronkhorst® stronglyrecommendsperforminganadditional, adequatedrying procedurefor those applications
whereremaining water particlesmaycauseundesiredreactionssuchascorrosion.

Bronkhorst®
9mini CORI-FLOW ML1209.17.097
2.4 Instrument mounting
For the mini CORI-FLOW ML120 proper stable mounting is
strongly advised on a rigid, solid base for optimal accuracy. For
optimal isolation for vibrations in the area, rubber dampeners
can be used.
In the right picture we show an example of a mini CORI-FLOW
ML120 with a mass block, one of the options Bronkhorst® can
provide for isolation of vibrations in the environment where the
instrument is used.
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PleaseseeQuickInstallation Guide, document nr.
9.17.093for moredetailedinformationabout mounting.
2.5 Leak Check
Bronkhorst® mini CORI-FLOW meters/controllers are equipped 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.
Note: Alwayscheckyour system for leaks, beforeapplyingfluid/gaspressure. Especiallyiftoxic, explosiveor other
dangerousfluidsare 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 sub-D settings are indicated on the instrument back-side 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 will be marked to prevent wrong connection.
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Applicablehook-updiagramsfor ML120 seriescanbefound at: http://www.bronkhorst.com/en/downloads
ML120series instrumentsarepoweredwith+15…+24 Vdc. Several hook-upexamplesand standard cables arefoundin
chapter3.
Theinstruments contain electronic componentsthat aresusceptible to damage by electrostaticdischarge. Proper
handlingproceduresmust betakenduringinstallation, removingand connecting theelectronics.
Theinstruments described inthismanual carrythe CE-markandare compliant with the EMC requirements. However
compliancewith the EMC requirementsisnot possiblewithout the useofproper cablesandconnector/gland assemblies.
Bronkhorst® recommendstheuseoftheir standard cables. Thesecableshave the right connectorsand iflooseends areused,
thesewill bemarkedto prevent wrong connection. Whenusing other cables, cablewire diametersshould besufficient to
carrythesupplycurrent and voltage lossesmust bekept aslowaspossible. Whenindoubt: contact your distributor.
When connectingthesystem toother devices(e.g. PLC), be surethat theintegrity oftheshielding isnot affected. Donot
useunshielded wire terminals.

Bronkhorst®
9.17.097mini CORI-FLOW ML12010
2.7 Analog / digital operation
2.7.1 Analog / local operation
Digital instruments can be operated with analog signals through the Sub D9 connector. The instruments are compatible in
use with analog instruments on this point.
At analog operation the following parameters are available:
- measured value
- setpoint (controllers only)
Connect the ML120 series instrument to the power supply/readout unit using a cable with 9-pin sub-D connector according
to the Bronkhorst® standard for the Sub-D9 connector. The next two examples have the following electrical properties:
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
Example 1
Example 2
When operatingtheinstrument throughtheanaloginterfaceit ispossibleto connect the instrument to anysupported
fieldbussystem (or RS232-interfacewith special cable) for reading/changingparameters(e.g. controller response).
2.7.2 Digital RS232 operation
Digital operation over RS232 can be established when using the following setup
or using a Bronkhorst® E-8000 readout/control unit. See section 3.4.1 for
connecting
to an E-8000.
Connecting the instrument with an RS232 cable or an RS232 cable with a USB to
RS232 converter to a PC will allow you to use (free) Bronkhorst® software for
Windows, such as FlowDDE and FlowPlot.
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A PiPS (Plug-inPower Supply, art.nr.: 7.03.422)is availableto power asingle instrument and can beusedinsteadofthe
DB9 Loose-end cableasshownin the exampleabove. Detailedinformationcanbefound inthemanual PiPS (9.17.055)
whichcanbedownloadedat thedownloadsectionfrom thewebsite: http://www.bronkhorst.com/en/downloads
2.7.3 Digital RS485 / bus operation
Withdigital operationover RS485 or Ethernet a bus-system with multipleinstrumentscanbeset up. For RS485 FLOW-BUS
or Modbusoperationover the9-pin sub-D connector or via an additional field busdriver (ifinstalled), see section 3.4.5.
For operationvia other additional field bussystems(e.g. DeviceNetTM, EtherCAT®), refer to section 3.5 or thespecific field
busmanual.

Bronkhorst®
11mini CORI-FLOW ML1209.17.097
2.8 Micro switch operation and LED indication
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 section 2.9, 'Zeroing'.
For a overview or possible LED indication see section 3.6, 'LED indications'.
Themicro switch ontopoftheML120seriescanbeoperatedwithathin, metal or hard plastic pin. For exampletheend of
apaperclip.
2.9 Zeroing
Zeroing of a (mini) CORI-FLOW instrument is required each time process conditions have been changed.
Whatiszero-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. See also Section 3.8.4 to learn how to zero.
Model*
DN(mm)
Zero-stability
Nominalflow
ML120
0.25
< 0.01 g/h
100 g/h
* Zero-stabilitydepends on the(mini) CORI-FLOW model
NOTE: Inpracticezero-stabilityturnsout tobebetter thanthevaluesin the table, but for calculationwewill takeworst
casevalues.
Processconditions
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. Zeroing with the Micro-switch
2. Zeroing through digital communication
Important: Alwaysmakesurethat there isabsolutelynoflowwhentheinstrument isperformingthe(auto-)zero procedure
andthere are no vibrationsor pulsatinginlet pressures.
If the instrument has problems finding a proper and stable zero, it will repeat the auto-zero procedure a few times (max. 4
times). Each time when no proper zero can be achieved, the instrument will give a short notice, signaling its LED’s after the
procedure. The red and green LED will blink turn-by-turn for a few seconds to indicate that the auto-zero wasn’t able to find
a zero (because of too much noise in the signal). This is mostly the case when the instrument is placed in a vibrating

Bronkhorst®
9.17.097mini CORI-FLOW ML12012
environment. When ready zeroing after trying several (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 a next zero-procedure will be performed. The mini CORI-FLOW will accept a proper zero 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.
2.9.1 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 (for zeroing through a command via BUS/RS232 see section 3.8.4):
1. Set processconditions
Warm-up, pressure up 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.
3. Press and hold, until GREEN l LED is on, than release button
Press 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 approx. 40
seconds.
5. Ready
When the indication is showing 0% signal and the green •indication LED is burning continuously again, then the
zeroing action was successful.
2.9.2 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 PC or PLC
·Through RS232, using a Bright compact local readout/control module
·Through other fieldbus system (PROFIBUS DP/DeviceNetTM/ModBus)
The following parameters must be used for zeroing an instrument:
Initreset [unsigned char, RW,0...255, DDEpar. = 7, Proces/par. = 0/10]
Cntrlmode [unsigned char, RW,0...255, DDEpar. = 12, Proces/par. = 1/4]
CalMode [unsigned char, RW,0...255, DDEpar. = 58, Proces/par. = 115/1]
1. Set processconditions
Warm-up, pressure up 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 values to the parameters in this sequence.
oInitreset 64
oCntrlmode 9
oCalmode 255
oCalmode 0
oCalmode 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 approx. 40 sec.
Make sure there is no flow through the instrument when performing the zeroing procedure.

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13mini CORI-FLOW ML1209.17.097
5. Ready
When indication is showing 0% signal and the green indication LED is burning continuously again, then zeroing has
been performed well. Also parameter control mode goes back to its original value. As last send 0 to parameter ‘initreset’.
2.10 Purging
Do not applypressureuntil electrical connections aremade. Whenapplyingpressureto thesystem, avoidpressureshocksin
thesystem andincreasepressuregradually. Also decreasepressuregradually when required.
If explosivegases are to beused, purgetheprocesswith inert dry gaslike Nitrogen, Argon etc. for at least 30 minutesat a
highenough flow.
Insystemsfor usewith corrosiveor reactivefluids, purgingfor at least 30 minuteswith adry, inert gas (likeNitrogenor
Argon)isabsolutely necessarybeforeuse. After usewithcorrosive or reactive fluids, completepurgingisalsorequiredbefore
exposingthesystem toair.
Prevent chemical reactionsinsidethetubes or instrument asthiswill tendtoclogupor corrodethesystem.
Let themini CORI-FLOWML120warm-upfor at least 30 minutesfor best accuracy.
2.11 Supply pressure
It is recommended to turn on power before applying pressure on the instrument and to switch off power after removing
pressure. Turn on fluid supply gently. Avoid pressure shocks and bring the instrument gradually up to the level of the actual
operating conditions. Also switch off fluid supply gently.
Makesure in case ofacontroller that theusedvalve canwithstandthesystem pressureandthemaximum delta pressure
allowed.
2.12 Calibration
Each miniCORI-FLOW ML120 instrument is factory calibrated. Bronkhorst® certifies that all instruments meet the rated
accuracy. Calibration is performed using measurement standards traceable to the Dutch Metrology Institute (VSL).
Calibration certificates are included in the shipment. Periodical inspection, recalibration or verification of the accuracy may
be subject to individual requirements of the end-user.
Unlessspecifiedotherwise, miniCORI-FLOWML120instruments areH2O calibrated.
2.13 Maintenance
No routine maintenance is required to be performed on the meters or controllers. In case of severe contamination it may be
required to clean the valve orifice separately.
If theequipment isnot properly serviced, seriouspersonal injury and/or damageto theequipment could betheresult. It is
thereforeimportant that servicingisperformedbytrained andqualifiedpersonnel.

Bronkhorst®
9.17.097mini CORI-FLOW ML12014
2.14 Temperature considerations
The mini CORI-FLOW has to be installed in such a way that levels of different temperature within the mini CORI-FLOW are
avoided. Avoid multiple 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 the first time at low temperature tighten the connector screws again in order to
prevent any leakage!
If theequipment isnot properly serviced, seriouspersonal injury and/or damageto theequipment could betheresult. It is
thereforeimportant that servicingisperformedbytrained andqualifiedpersonnel.
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.
Anyway, one must take care that the instrument in the housing will not exceed the 70°C; otherwise the electronics will be
damaged. To check this, the internal temperature sensor can be used. Via FLOW-DDE/E-8000 or Bright it can be read out.
Please make sure the temperature value readout here (=actual temperature in housing) will not exceed 70°C. 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

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15mini CORI-FLOW ML1209.17.097
3Basic operations
3.1 Mass flow measurement and control
After correct installation of the mini CORI-FLOW ML120 series Mass Flow Meter (MFM) or Mass Flow Controller (MFC) and all
safety precautions have been taken into account (see chapter 2) the instrument can immediately be used for measuring/
controlling the required flow rate in the system by means of the selected communication interface(s).
Here are some general guidelines for mass flow measurement/control:
mini CORI-FLOWML120MFMs/MFCsareadjustedto thespecified inlet/outlet pressure, temperatureandprocessliquid/
gasconditionsassuppliedbythecustomer, however theinstrument will functionproperly ina widerangeofvarying
conditions. It is stronglyadvised touse theFlowPlot TMsoftwareavailablewiththeinstrument to set thecorrect process
conditionsifthe actual process conditionsdiffer from the conditionsfor whichtheinstrument is set (seesection 3.1.1).
AlthoughminiCORI-FLOW ML120seriesMFMs/MFCshave excellent temperaturestability, thebest accuracyisachieved
whentemperaturegradientsacrosstheinstrumentsareavoided; somakesurethat theliquidor gastemperatureequalsthe
ambient temperatureand mount theinstrumentsonarigid (heat conducting) surface.
mini CORI-FLOWML120seriesMFCshandle pressureshocksinthe system well, but arenot insensitive to pressure
fluctuations. For optimum control stability, provideastable(pressurecontrolled) inlet pressure
MASSFLOW CONTROL
When an MFC (either with normally closed (n.c.) or normally opened (n.o.)
valve) is hooked-up, the control valve closes when no setpoint is given.
When the MFC receives a setpoint from the active setpoint source, the
internal PID controller will immediately open the control valve until the
required flow rate is achieved and it will maintain that flow rate until
another setpoint is given.
3.1.1 Changing control, range and operating conditions
INSTRUMENT SETTINGS
This window allows the user to read and change several settings of digital meters and controllers. Changing these
parameters will need special knowledge about the instruments and the behavior of the instruments. This document may
not be enough to optimize an instrument. Bronkhorst® offers special trainings for field users for this. Please ask your local
representative about this. From the moment the window appears, it will take a few seconds to read all the actual parameter
values and update the screen. After that, changing a setting will immediately send the change to the instrument and the
effect of the change can be viewed in the plot window.
Channel & control mode
0 – Bus/RS232 : Digital setpoint via fieldbus or RS232
1 – Analog input : Setpoint via analog input
3 – Valve fullyclosed : Valve fully closed and stays closed under all circumstances
8 – Valve fullyopen : Valve fully opened (purge) and stays opened under all
circumstances
11 – Keyboard & FLOW-BUS: Setpoint via E-8000 keyboard, bus or RS232
Capacity andunit
·Unit type: Selects the flow measurement
·Mass flow
·Volume flow
·Full scale value: Selection of the Full scale
Sensor zero
Auto zero: adjustment of zero when no flow
Note: Instrument must be warmed up No flow may flow during auto zero

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9.17.097mini CORI-FLOW ML12016
3.1.2 Valve Safe State
When an MFC is not powered, the control valve automatically returns to its 'Safe State', which is closed for a 'normally closed
(n.c.)' valve and fully opened for a 'normally opened (n.o.)' valve. During operation, certain communication errors may cause
the MFC to go to the 'Valve Safe State' mode to protect the system, e.g. when fieldbus communication fails (PROFIBUS DP,
DeviceNet™, EtherCAT® and PROFINET only). Also when fluidset configuration of the instrument is incorrect, the instrument
may go to the 'Valve Safe State' mode. See section 3.6 for more information and the LED indications for the 'Valve Safe State'
mode or section 4.1.3 for the fluidset configuration parameters.
3.2 Communication interfaces
Numerous input/output options can be installed on ML120 series instruments via both the 9-pin sub-D connector on the
side of the instrument and the optional field bus connector on top of the instrument.
Analog/RS232
·Via the 9-pin sub-D side connector the instrument can be operated by means of:
·Analog interface (section 3.3): 0…5 Vdc; 0…10 Vdc; 0…20 mA or 4…20 mA
·Digital RS232 interface (section 3.4 and document9.17.027): FLOW-BUS (Propar) protocol
The following optional field bus interfaces can be installed:
·FLOW-BUS interface (section 3.4 and document 9.17.024)
·Modbus (RTU or ASCII) interface (section 3.4 and document 9.17.035)
·PROFIBUS DP interface (section 3.5 and document 9.17.025)
·DeviceNet™ interface (section 3.5 and document 9.17.026)
·EtherCAT® interface (section 3.5 and document 9.17.063)
·PROFINET interface (section 3.5 and document 9.17.095)
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Abovedocumentscanbefoundat: http://www.bronkhorst.com/en/downloads
The interpretation of the LED indications and use of the micro switch button on top of the instrument is discussed in
section 3.6 and section 3.7 respectively.
3.2.1 Using multiple interfaces
The analog interface is always present on ML120 series instruments. An interface to any available field bus is optional.
Operation via analog interface, RS232 and an optional field bus (top connector) can be performed at the same time. When
using multiple interfaces, reading of parameters can be done simultaneously. When changing a parameter value, the last
value sent by any of the interfaces will be valid.
Control mode
A controller setpoint is accepted from either the analog or digital interface, but not both. Analog or digital operation is
selected at ordering.

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17mini CORI-FLOW ML1209.17.097
3.3 Analog operation
The following analog signals are available for each instrument through the 9-pin sub-D side connector:
·Measured value (analog output) at pin 2
·Setpoint (analog input/setpoint) at pin 3
Thefactory selectedanaloginterface(0…5 Vdc;0…10 Vdc; 0…20 mA or 4…20 mA) canbefound in themodelkeyof the
instrument(section 1.5) and in thepin description attheinstrumentbackside 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).
3.3.1 Hook-up
Refer to the hook-up diagram for analog operation (document 9.16.119) or use a 9-pin sub-D loose-end cable 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
Cable
7.03.004 (3m)
7.03.536 (5m)
7.03.537 (10m)
3.4 Basic RS232 operation
Digital RS232 (or bus) operation adds a lot of extra features to the instruments compared to analog operation, such as:
·Multi range functionality (section 3.1.1)
·Direct reading at readout/control module or host computer (section 3.4.1)
·Self-testing and diagnostics (section 5.1)
·Identification (section 3.8.2)
·Adjustable minimum and maximum alarm limits (section 3.8.3)
·(Batch) counter (section 3.8.3)
Each instrument process is controlled (internally) by specific parameters. The instrument parameter values are accessible
through the available digital interfaces to influence the instrument behavior. In this section it is explained how to operate
an instrument using RS232 communication.
Make sure in FlowDDE the correct port and baud rate are selected. Baudrate should be: 38400 Baud.
3.4.1 Hook-up
A special T-part cable (7.03.366) is required for connecting the 9-
pin sub-D side connector of an miniCORI-FLOW ML120 series
instrument to a COM port of a pc 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 sub-D 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 PLC or
microcontroller devices.
If an instrument is powered through the bus connector on top
of the instrument (if present), the 9-pin sub-D 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™.

Bronkhorst®
9.17.097mini CORI-FLOW ML12018
Keep in mind that the 9-pin sub-D configuration of a Bronkhorst® instrument differs from the 9-pin sub-D
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.
3.4.1.1 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 sub-D (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
functions described in this document can be used. See E-8000
manual (document 9.17.076) for more information.
3.4.1.2 BRIGHT
When an miniCORI-FLOW ML120 instrument is used in
combination with a BRIGHT B1 or B2 readout/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).
3.4.2 FlowDDE
RS232 communication can be used for operating the instrument using the Bronkhorst® FlowDDE server application.
Dynamic Data Exchange (DDE) provides the user a basic level of interprocess communication between Windows
applications. FlowDDE is a DDE server application. Together with a client application, either self-made or with a SCADA-
program from third parties, it is possible to create an easy way of data exchange between the flow meter/controller and a
Windows application. For example, a cell in Microsoft Excel could be linked to the measured value of the mini CORI-FLOW
ML120 and when the measured value changes, it will be updated automatically in the Excel spreadsheet.
The FlowDDE server offers the user a different and user-friendly interface to the instrument. FlowDDE makes use of specific
parameter numbers for communicating with the instrument. A DDE-parameter number is a unique number in a special
FlowDDE instruments/parameter database and not the same as the parameter number from the process on an instrument.
Node-address and process number will be translated by FlowDDE to a channel number.
DDE-client applications communicate to the FlowDDE server by using DDE messages. Before messages can be exchanged, a
DDE link has to be made. A DDE link consists of three parts: the server, the topic and an item. For separation the characters '|'
and '!' may be used, so a DDE link in e.g. Microsoft Excel becomes: Server|Topic!Item.
For standard instrument parameters and the FlowDDE server, these are:
·Server: FlowDDE or FlowDDE2
·Topic: ‘C(X)’ for channel number X
·Item: ‘P(Y)’ for parameter number Y
An example of a DDE link in a Microsoft Excel cell is =FlowDDE|’C(1)’!’P(8)’
to read parameter 8 of channel 1.
How to setup a DDE link with FlowDDE is described in the help-file of
the FlowDDE application and in the instruction manual document
9.17.067. Programming examples are available for making applications
in: Visual Basic, LabVIEW and Microsoft Excel.
When not using FlowDDE for communication with the instrument, each
parameter value is addressed by:
·Node address of the instrument
·Process number on the instrument
·Parameter number on the instrument
Refer to section 3.8 for more for more information regarding instrument parameters.

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19mini CORI-FLOW ML1209.17.097
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For more information regarding FlowDDE, see document 9.17.067 'Instruction manual FlowDDE' which can be
found on: downloads.bronkhorst.com
3.4.3 Software
Examples of free Bronkhorst® DDE client applications: FlowDDE, FlowPlot and FlowView. Other software programs
supporting DDE are for example MS-Office, LabVIEW, InTouch and Wizcon.
Bronkhorst® software applications 'FlowView' (left) and 'FlowPlot' (right)
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FlowDDE and other Bronkhorst® applications are available on the support CD or can be downloaded from
the Bronkhorst® internet site: downloads.bronkhorst.com
3.4.4 Baud rate setup
miniCORI-FLOW ML120 series instruments support the following baud rates for RS232 communication. The factory selected
baud rate is indicated on the instrument back-side label. Refer to section 4.2.2 for changing the baud rate settings for the
instrument. The default baud rate for RS232 communication is 38400 Baud.
Mode:
Digital
Interface/medium:
RS232
Protocol:
FLOW-BUS
Baud rate:
9600
16200
38400
57600
115200
230400
460800
Nodeaddress:
3
Parity:
None
RS232 communication options
Changing RS232 settings of the 9-pin sub-D side connector interface refer to section 4.2.2 for changing the
baud rate settings for the instrument.
Make sure that the instrument’s baud rate corresponds with the baud rate of the application the instrument
is communicating with, otherwise no communication can be established.
For RS232 communication, the maximum cable length is 10 m for baud rates up to 38400 Baud. For higher
baud rates, use cable lengths of maximum 3 m.

Bronkhorst®
9.17.097mini CORI-FLOW ML12020
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For more information regarding communication through an RS232 interface, see document9.17.027: RS232
interface with FLOW-BUS for digital instruments. http://www.bronkhorst.com/files/downloads/
manuals_english/ 917027manual_rs232_interface.pdf
3.4.5 Basic RS485 (FLOW-BUS/Modbus) operation
This section is limited to RS485 FLOW-BUS or Modbus communication. For communication through other field bus
interfaces see section 3.5.
FLOW-BUS or Modbus communication is available only if either the FLOW-BUS or Modbus RJ-45 connector on top of the
instrument is present, or if the 9-pin sub-D side connector is set for FLOW-BUS or Modbus communication.
3.4.5.1 FLOW-BUS
FLOW-BUS is a Bronkhorst® designed field bus, based on RS485 technology, for digital communication between devices,
offering the possibility of host-control by a pc.
Characteristics:
•Baud rates of 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)
•PC communication via (local host) FLOW-BUS – RS232 interface
•Connection of max. 120 instruments on a single bus
•Maximum bus length: 600 m
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See document9.17.024for moreinformationabout FLOW-BUS communication.
Moredetailedinformationabout Modbus canbefound at www.modbus.org or anywebsite ofthe(local)Modbus
organizationofyour country (whenavailable).
3.4.5.2 Modbus
Modbus is a 3-wire, RS485-based field bus communication system for parameter value exchange. In this system each
instrument/device is equipped with a micro-controller for its own dedicated task but also for exchanging parameter value
information with other devices connected to the same Modbus system. In a Modbus system Bronkhorst® instruments
always serve as Modbus slaves. There is no mutual communication between Modbus slaves, only between master and slave.
The master device is for example a pc.
Characteristics:
•Several selectable baud rates 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
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See document9.17.035for moreinformationabout Modbuscommunication.
3.4.6 Hook-up
The illustrations below show examples of a number of mini CORI-FLOW ML120 Series instruments in an RS485 bus-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.
FLOW-BUSsetup(example)
In the example on the next page an E-8000 power supply/readout control unit with FLOW-BUS 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 pc 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 miniCORI-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.