BRONKHORST mini CORI-FLOW ML120 User manual

Brand: BRONKHORST

Model: mini CORI-FLOW ML120

Category: Measuring, testing & control

Type: User manual

Doc. no.: 9.17.097D Date: 21-12-2015

Instruction Manual

Please read this Instruction Manual carefully before installing and operating the instrument. Not

following the guidelines could result in personal injury and/or damage to the equipment.

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.

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. Discarding this information could cause injuries to people or damage to the instrument or

installation.

Helpful information. This information will facilitate the use of this instrument.

www

Additional info available on the internet 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.

Check the packing list to ensure that you received all of the items.

Do not discard spare or replacement parts with the packing 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 packing in a cupboard warehouse or similar. Care should be taken not to

subject the equipment to excessive temperatures or humidity.

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.

www

See also 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 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.

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Bronkhorst®

9.17.097mini CORI-FLOW ML1204

Table of contents

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Scope of this manual 1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61.1 Introduction

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61.2 Intended use

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61.3 Product description

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.4 References to other applicable documents

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.5 Model key

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Sta rti ng u p 2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.1 Check functional properties

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.2 Check operating conditions

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Rated pressure test inspection 2.2.1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Seals 2.2.2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Environmental ratings 2.2.3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.3 Piping requirements

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.4 Instrument mounting

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.5 Leak Check

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.6 Electrical connection

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102.7 Analog / digital operation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Analog / local operation 2.7.1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Digital RS232 operation 2.7.2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Digital RS485 / bus operation 2.7.3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112.8 Micro switch operation and LED indication

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112.9 Zeroing

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Zeroing using micro switch 2.9.1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Zeroing through digital communication 2.9.2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.10 Purging

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.11 Supply pressure

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.12 Calibration

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.13 Maintenance

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142.14 Temperature considerations

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Bas ic o per ati o ns 3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153.1 Mass flow measurement and control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Changing control, range and operating conditions 3.1.1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Valve Safe State 3.1.2

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Using multiple interfaces 3.2.1

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Hook-up 3.3.1

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Hook-up 3.4.1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18E-8000 3.4.1.1

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18FlowDDE 3.4.2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Software 3.4.3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Baud rate setup 3.4.4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Basic RS485 (FLOW-BUS/Modbus) operation 3.4.5

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5mini CORI-FLOW ML1209.17.097

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Hook-up 3.4.6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Software 3.4.7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Baud rate, node address and parity setup 3.4.8

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Hook-up 3.5.1

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243.6 LED indications

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253.7 Micro switch functions

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263.8 Basic parameters and properties

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Introduction 3.8.1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Basic identification parameters 3.8.2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Basic alarm and counter settings 3.8.3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Zeroing (using digital operation) 3.8.4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Instrument parameter list 3.8.5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Basic measurement and control parameters 3.8.6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Ad van ced o pe rati o n 4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324.1 Advanced parameters and properties

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Advanced measurement and control parameters 4.1.1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Special instrument parameters 4.1.2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Advanced fluidset, range and operating conditions parameters 4.1.3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38Advanced alarm parameters 4.1.4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Advanced counter parameters 4.1.5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 414.2 Field bus operation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41FLOW-BUS master/slave controller operation 4.2.1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42Changing baud rate, node address and parity 4.2.2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 444.3 Special instrument features

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44Customized IO options (pin 5) 4.3.1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46Changing default control mode 4.3.2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46Troubleshooting and service 5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 465.1 Diagnostics

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 475.2 Troubleshooting

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495.3 Service

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50Removal and return instructions 6

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 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 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 mini CORI-FLOW features density and

temperature of the fluid as secondary outputs.

Multi-range instrument

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

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 DeviceNetTM 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 DeviceNetTM

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®

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

www

These documents can be found at: 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.

The tested pressure is stated on the instrument with a RED COLOURED sticker.

Check this test pressure before installing the instrument in the application. If the

sti cker i s not available or the test pressure is incorrect, the instrument should not

be mounted in the process line and be returned to the factory.

NOTE! Tested pressure is higher than the maximum operating pressure.

Mass Flow Meter

Mass Flow Controller

2.2.2 Seals

mini CORI-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 be held responsible for any damages caused by the user, applying the instruments for fluids that were

not specified during purchase, or caused by exceeding the indicated maximum operating pressure/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 compliance with EMC r equirements

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

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.

Warning!

During the manufacturing process, the instruments have been tested with water. Despite the fact that the instruments have

been purged thoroughly afterwards, we cannot guarantee that the delivered instruments are absolutely free from 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®

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.

www

Please see Quick Installation Guide, document nr.

9.17.093 for more detailed information about 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: Always check your system for leaks, before applying fluid/gas 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 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.

www

Applicable hook-up diagrams for ML120 series can be found at: http://www.bronkhorst.com/en/downloads

ML120 series instruments are powered with +15…+24 Vdc. Several hook-up examples and standard cables are found in

chapter 3.

The instruments contain electronic components that are susceptible to damage by electrostatic discharge. Proper

handling procedures must be taken during installation, removing and connecting the electronics.

The instruments described in this manual carry the CE-mark and are compliant with the 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 will be marked to prevent wrong connection. When using other cables, cable wire diameters should be sufficient to

carry the supply current and voltage losses must be kept as low as possible. When in doubt: contact your distributor.

When connecting the system to other devices (e.g. PLC), be sure that the integrity of the shielding is not affected. Do not

use unshielded 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 operating the instrument through the analog interface it is possible to connect the instrument to any supported

fieldbus system (or RS232-interface with special cable) for reading/changing parameters (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.

www

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 at the download section from the website: http://www.bronkhorst.com/en/downloads

2.7.3 Digital RS485 / bus operation

With digital operation over RS485 or Ethernet a bus-system with multiple instruments can be set up. For RS485 FLOW-BUS

or Modbus operation over the 9-pin sub-D connector or via an additional field bus driver (if installed), see section 3.5. For

operation via other additional field bus systems (e.g. DeviceNetTM, EtherCAT®), refer to section 3.6 or the specific field bus

manual.

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'.

The micro switch on top of the ML120 series can be operated with a thin, metal or hard plastic pin. For example the end of

a paperclip.

2.9 Zeroing

Zeroing of a (mini) CORI-FLOW instrument is required each time process conditions have been changed.

W hat is zer o-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 3.5.9 to learn how to zero.

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

NOTE: 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. Zeroing with the Micro-switch

2. Zeroing through digital communication

Important: Always make sure that there is absolutely no flow when the instrument is performing the (auto-)zero procedure

and there are no vibrations or pulsating inlet 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 3.9.5):

1. Set pro cess conditions

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/DeviceNet/ModBus)

The following parameters must be used for zeroing an instrument:

Initreset [unsigned char , RW,0...255, DDEpar. = 7, Pr oces/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 pro cess conditions

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 par ameter s

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.

Bronkhorst®

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 apply pressure until electrical connections are made. When applying pressure to the system, avoid pressure shocks in

the system and increase pressure gradually. Also decrease pressure gradually when required.

If explosive gases are to be used, purge the process with inert dry gas like Nitrogen, Argon etc. for at least 30 minutes at a

high enough flow.

In systems for use with corrosive or reactive fluids, 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.

Let the mini CORI-FLOW ML120 warm-up for at least 30 minutes for 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.

Make sure in case of a controller that the used valve can withstand the system pressure and the maximum delta pressure

allowed.

2.12 Calibration

Each mini CORI-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.

Unl ess speci fi ed other wise, mini CORI-FLOW ML120 instrument s are H 2O 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 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.

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 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.

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

Bronkhorst®

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-FLOW ML120 MFMs/MFCs are adjusted to the specified inlet/outlet pressure, temperature and process liquid/

gas conditions as supplied by the customer, however the instrument will function properly in a wide range of varying

conditions. It is strongly advised to use the FlowPlot TM software available with the instrument to set the correct process

conditions if the actual process conditions differ from the conditions for which the instrument is set (see section 3.1.1).

Although mini CORI-FLOW ML120 series MFMs/MFCs have excellent temperature stability, the best accuracy is achieved

when temperature gradients across the instruments are avoided; so make sure that the liquid or gas temperature equals the

ambient temperature and mount the instruments on a rigid (heat conducting) surface.

mini CORI-FLOW ML120 series MFCs handle pressure shocks in the system well, but are not insensitive to pressure

fluctuations. For optimum control stability, provide a stable (pressure controlled) inlet pressure

MASS FLOW 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

INST RUMENT 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 fully closed : Valve fully closed and stays closed under all circumstances

8 – Valve fully open : Valve fully opened (purge) and stays opened under all

circumstances

11 – Keyboar d & FLOW -BUS : Setpoint via E-8000 keyboard, bus or RS232

Capacity and unit

·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

Bronkhorst®

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 3.7 for more information and the LED indications for the 'Valve Safe State'

mode or section 4.2.3 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 document 9.17.027): FLOW-BUS (Propar) protocol

The following optional field bus interfaces can be installed:

·FLOW-BUS interface (section 3.5 and document 9.17.024)

·Modbus (RTU or ASCII) interface (section 3.5 and document 9.17.035)

·PROFIBUS DP interface (section 3.6 and document 9.17.025)

·DeviceNet™ interface (section 3.6 and document 9.17.026)

·EtherCAT® interface (section 3.6 and document 9.17.063)

·PROFINET interface (section 3.6 and document 9.17.095)

www

Above documents can be found at: 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 3.7 and sectio n 3.8 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.

Bronkhorst®

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

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 (section 1.5) and in the pin description at the instrument backside 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 3.9.3)

·Adjustable minimum and maximum alarm limits (section 3.9.4)

·(Batch) counter (section 3.9.4)

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 mini CORI-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 mini CORI-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 3.9 for more for more information regarding instrument parameters.

Bronkhorst®

19mini CORI-FLOW ML1209.17.097

www

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 'FlowVie w' (left) and 'FlowPlot' (right)

www

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

mini CORI-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 4.3.2 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

Node address:

Parity:

None

RS232 communication options

Changing RS232 settings of the 9-pin sub-D side connector interface refer to section 4.3.2 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

www

For more information regarding communication through an RS232 interface, see document 9.17.027: 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 3.6.

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

www

See document 9.17.024 for more information about FLOW-BUS communication.

More detailed information about Modbus can be found at www.modbus.org or any website of the (local) Modbus

organization of your country (when available).

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

www

See document 9.17.035 for more information about Modbus communication.

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-BUS setup (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 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.

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BRONKHORST mini CORI-FLOW ML120 User manual

Brand: BRONKHORST

Model: mini CORI-FLOW ML120

Category: Measuring, testing & control

Type: User manual

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BRONKHORST mini CORI-FLOW ML120 User manual

BRONKHORST mini CORI-FLOW ML120 User manual

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