BRONKHORST EL-FLOW Prestige series User manual

Doc. no.: 9.17.084G Date: 16-03-2018
ATTENTION
Pleaseread this Instruction Manual carefully beforeinstalling and operating theinstrument.
Not following the guidelines could resultin personalinjury and/or damageto the equipment.
EL-FLOW® Prestige series
Thermal Mass Flow Meters/Controllers
Instruction Manual

Bronkhorst®
Instruction Manual EL-FLOW® Prestige 9.17.084G2
Disclaimer
The information in this manual has been reviewed and is believed to be wholly reliable. No responsibility, however, is
assumed for inaccuracies. The material in this manual is for information purposes only.
Copyright
© 2018 Bronkhorst High-Tech B.V.
All rights reserved. This documentation is protected by copyright.
Subject to technical and optical changes as well as printing errors. The information contained in this document is subject to
change at any time without prior notification. Bronkhorst High-Tech B.V. reserves the right to modify or improve its
products and modify the contents without being obliged to inform any particular persons or organizations. The device
specifications and the contents of the package may deviate from what is stated in this document.
Symbols
Important information. Disregarding this information could cause injuries to people or damage to the instrument or
installation.
Helpful information. This information will facilitate the use of the instrument and/or contribute to its optimal
performance.
Additional info available on the internet or from your local sales representative.
Receipt of equipment
Check the outside package box for damage incurred during shipment. If the box is damaged, then the local carrier must be
notified at once regarding his liability, if so required. At the same time a report should be submitted to your local sales
representative.
Carefully remove the equipment from the box. Verify that the equipment was not damaged during shipment. Should the
equipment be damaged, then the local carrier must be notified at once regarding his liability, if so required. At the same
time a report should be submitted to your local sales representative.
Check the packing list to ensure that you received all of the items within the scope of delivery.
Do not discard spare or replacement parts with the packaging material and inspect the contents for damage.
Refer to Removal and return instructions about return shipment procedures.
Equipment storage
The equipment should be stored in its original package in a cupboard warehouse or similar. Care should be taken not to
subject the equipment to excessive temperatures or humidity.

Bronkhorst®
Instruction Manual EL-FLOW® Prestige9.17.084G 3
Warranty
Bronkhorst® products are warranted against defects in material and workmanship for a period of three years from the date
of shipment, provided they are used in accordance with the ordering specifications and not subject to abuse or physical
damage. Products that do not operate properly during this period may be repaired or replaced at no charge. Repairs are
normally warranted for one year or the balance of the original warranty, whichever is the longer.
See also section 9 (Guarantee) of the Conditions of sales:
www.bronkhorst.com/about/conditions-of-sales/
The warranty includes all initial and latent defects, random failures, and indeterminable internal causes.
It excludes failures and damage caused by the customer, such as contamination, improper electrical hook-up, physical shock
etc.
Re-conditioning of products primarily returned for warranty service that is partly or wholly judged non-warranty may be
charged for.
Bronkhorst High-Tech B.V. or affiliated company prepays outgoing freight charges when any part of the service is
performed under warranty, unless otherwise agreed upon beforehand, however, if the product has been returned collect to
our factory or service center, these costs are added to the repair invoice. Import and/or export charges, foreign shipping
methods/carriers are paid by the customer.
General safety precautions
This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety
precautions required to avoid possible injury. Read the operating information carefully before using the product.
Before operating, make sure the line cord is connected to a properly grounded power receptacle. Inspect the connecting
cables for cracks or breaks before each use.
The equipment and accessories must be used in accordance with their specifications and operating instructions, otherwise
the safety of the equipment may be impaired.
If required, replace fuses with the same type and rating for continued protection against fire hazard.
Opening of the equipment is not allowed. There are no repairable parts inside. In case of a defect please return the
equipment to Bronkhorst High-Tech B.V.
One or more warning signs may be present on different parts of the product. These signs have the following meaning:
Consult the instruction manual for handling instructions
Surface may get hot during operation
Shock hazard; electrical parts inside
To maintain protection from electric shock and fire, replacement components must be obtained from Bronkhorst. Standard
fuses, with applicable national safety approvals, may be used if the rating and type are the same. Other components that are
not safety related may be obtained from other suppliers, as long as they are equivalent to the original component. Selected
parts should be obtained only through Bronkhorst, to maintain accuracy and functionality of the product. If you are unsure
about the relevance of a replacement component, contact Bronkhorst for information.

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Instruction Manual EL-FLOW® Prestige 9.17.084G4

Bronkhorst®
Instruction Manual EL-FLOW® Prestige9.17.084G 5
Table of contents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Introduction 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.1 Scope of this manual
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.2 Intended use
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.3 Product description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81.4 Other documents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.5 Model key
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Starting up 2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102.1 Functional properties
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102.2 Operating conditions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102.3 Piping requirements
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112.4 Mounting
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112.5 Leak check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112.6 Electrical connection
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122.7 Analog / digital communication
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Analog / local communication 2.7.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Digital RS232 communication 2.7.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Digital RS485 / fieldbus communication 2.7.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122.8 Micro switch operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.9 Powering up and powering down
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.10 Purging before use
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.11 Zeroing before use
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.12 Calibration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.13 Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Basic operation 3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143.1 Mass flow measurement and control
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Changing fluid set, range or operating conditions 3.1.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Valve Safe State 3.1.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163.2 Communication interfaces
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Using multiple interfaces 3.2.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173.3 Analog operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Cabling 3.3.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173.4 Basic RS232 operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Cabling 3.4.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19FlowDDE 3.4.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Software (DDE applications) 3.4.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Baud rate setup 3.4.4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213.5 Basic RS485 operation (FLOW-BUS/Modbus)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Cabling 3.5.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Software 3.5.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Baud rate, node address and parity setup 3.5.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243.6 Other fieldbus configurations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Baud rate, node address and parity setup 3.6.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253.7 LED indications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263.8 Micro switch functions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Normal operating functions 3.8.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Power-up functions 3.8.2

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Instruction Manual EL-FLOW® Prestige 9.17.084G6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Control mode - readout/change 3.8.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Network settings - readout/change 3.8.4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303.9 Basic parameters and properties
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30General 3.9.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Measurement and control (basic) 3.9.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Device identification 3.9.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Alarms and counter 3.9.4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323.10 Adjusting zero point
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Manual procedure 3.10.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Digital procedure 3.10.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Advanced operation 4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344.1 Sealing material compatibility
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354.2 Advanced parameters and properties
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Measurement and control (advanced) 4.2.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Special parameters 4.2.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Fluid set 4.2.3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Alarms 4.2.4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43Counter 4.2.5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44Network configuration 4.2.6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Master/slave configuration (FLOW-BUS) 4.2.7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 464.3 Special features
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46Customized I/O options (pin 5) 4.3.1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48Changing default control mode 4.3.2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Troubleshooting and service 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495.1 Errors and warnings
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495.2 Restoring factory settings
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 505.3 Common issues
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 515.4 Service
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Removal and return instructions 6

Bronkhorst®
Instruction Manual EL-FLOW® Prestige9.17.084G 7
1Introduction
1.1 Scope of this manual
This manual covers the EL-FLOW® Prestige series mass flow meters/controllers for gases. This manual includes product
information, installation instructions, operation, maintenance and troubleshooting tips.
1.2 Intended use
EL-FLOW® Prestige instruments are designed to accurately measure and/or control gas flow rates of a specified gas at
conditions noted on the instrument label. The gas in the pressurized system in which the instrument is mounted has to be
clean and dry. The instruments are suited for general purpose indoor (dry) applications, like laboratories and in well
protected (OEM) housings. The instruments can be used for either (fast) switching gas flow or for controlling a constant
flow rate (mass flow controllers only).
The end user is considered to be familiar with the necessary safety precautions, and to comply with the appropriate
protective measures as described in the Material Safety Data Sheets of the media to be used in the system (if applicable).
The wetted materials incorporated in the EL-FLOW® Prestige are compatible with media and conditions (e.g. pressure,
temperature) as specified at ordering time. If you are planning to use the product (including any third party components
supplied by Bronkhorst, such as pumps or valves) with other media and/or other conditions, always be sure to check the
wetted materials (including seals) for compatibility. See the technical specifications of the product and consult third party
documentation (if applicable) to check the incorporated materials.
Responsibility for the use of the equipment with regard to suitability, intended use, cleaning and corrosion resistance of the
used materials against the applied media lies solely with the end user. Bronkhorst High-Tech B.V. cannot be held liable for
any damage resulting from improper use, use for other than the intended purpose or use of other media and/or conditions
than specified on the purchase order.
1.3 Product description
EL-FLOW® Prestige is the next generation of Bronkhorst® Mass Flow Meters/ Controllers using the latest, highly accurate,
thermal by-pass sensor technology and featuring excellent control characteristics. Thanks to the advanced sensor
technology in combination with a state-of-the-art printed circuit board, the instruments feature improved long-term
stability as well as an unsurpassed temperature stability. Furthermore, due to a power efficient microprocessor, the power
consumption of the instrument is reduced. The mass flow meters and controllers can be supplied in full scale ranges from
0,7 mln/min up to 20 ln/min Air-equivalent at max. 64 or 100 bar (1000 or 1500 psi) pressure rating.
EL-FLOW® Prestige offers high flexibility due to the multi-gas/multi-range functionality. This function, now extended to 25
gases and mixtures thereof, is easily accessible via the FlowTune™ software or PLC; there is no need to disconnect the
instrument from your system. For additional gas types the user can calculate accurate fluid properties for conversion by
means of our free, online software tool FLUIDAT® on the Net. Users of EL-FLOW® Prestige instruments can rescale their
instruments on site, saving time and money for dismounting and recalibration.

Bronkhorst®
Instruction Manual EL-FLOW® Prestige 9.17.084G8
Numerous input/output options can be installed through the programmable sub-D 9-pin connector (from factory). In
addition to the various analog signal options and the standard RS232 communication, there are such options as RS485
communication, digital frequency/pulse output, alarm output/reset, valve purge/close and analog valve output.
Furthermore Bronkhorst offers various integrated fieldbus options: DeviceNet™, PROFIBUS DP, Modbus RTU/ASCII, EtherCAT®,
PROFINET and FLOW-BUS.
1.4 Other documents
Basic instructions
Dimensional drawings
Document 9.17.083
Quick installation guide EL-FLOW Prestige
Document 7.15.176
Dimensional drawing FG-110C
Document 7.15.177
Dimensional drawing FG-111B
Document 7.15.178
Dimensional drawing FG-200CV / FG-210CV
Document 7.15.179
Dimensional drawing FG-201CV / FG-211CV
Document 7.15.180
Dimensional drawing FG-201CS
Advanced instructions
Hook-up diagrams
Document 9.17.027
Instruction manual RS232 interface
Document 9.16.119
Hook-up diagram LAB MBC3 RS232 and Analog
Document 9.17.024
Instruction manual FLOW-BUS interface
Document 9.16.120
Hook-up diagram LAB MBC3 FLOW-BUS
Document 9.17.025
Instruction manual PROFIBUS DP interface
Document 9.16.121
Hook-up diagram LAB MBC3 PROFIBUS DP
Document 9.17.026
Instruction manual DeviceNetTM interface
Document 9.16.122
Hook-up diagram LAB MBC3 DeviceNetTM
Document 9.17.035
Instruction manual Modbus interface
Document 9.16.123
Hook-up diagram LAB MBC3 Modbus
Document 9.17.063
Instruction manual EtherCAT® interface
Document 9.16.124
Hook-up diagram LAB MBC3 EtherCAT®
Document 9.17.095
Instruction manual PROFINET interface
Document 9.16.147
Hook-up diagram LAB MBC3 PROFINET
Document 9.16.118
Hook-up diagram LAB MBC3 Custom bus & IO
configurations
These documents can be downloaded from http://www.bronkhorst.com/en/downloads

Bronkhorst®
Instruction Manual EL-FLOW® Prestige9.17.084G 9
1.5 Model key
The model key on the product label contains information about the technical properties of the instrument as ordered. The
specific properties can be retrieved with the diagram below.
See secti on Customized I/O options (pin 5) for more information about the pin-5 configuration options.

Bronkhorst®
Instruction Manual EL-FLOW® Prestige 9.17.084G10
2Starting up
2.1 Functional properties
Before installing the EL-FLOW® Prestige, check the label on the rear side of the
instrument to see if the functional properties match your requirements:
·Flow rate
·Media to be used in the instrument
·Input and output signal (see also section Electrical connection)
·Upstream and downstream pressure(s)
·Operating temperature
·Valve type (NC = Normally Closed, NO = Normally Opened)
2.2 Operating conditions
Test pressure
Bronkhorst® instruments are pressure tested to at least 1.5 times the specified working process
conditions and outboard leak tested to at least 2 * 10-9 mbar l/s Helium. The tested pressure is specified
on the instrument with a red sticker. If this sticker is missing or if the specified pressure is insufficient,
the instrument must not be used and should be returned to the factory.
Before installation, make sure that the tested pressure is in accordance with the safety factor of your application. The tested
pressure must always be higher than the maximum operating pressure.
Disassembling the instrument and/or replacing parts of it will invalidate the pressure test specification.
Sealing material compatibility
The EL-FLOW® Prestige is fitted with specific sealing material(s), compatible with the media specified at ordering time. Be
sure that the sealing materials are compatible with the media and conditions used in the system. Bronkhorst High-Tech
B.V. cannot be held responsible for any damage resulting from the use of other media and/or conditions than specified on
the purchase order.
See secti on Sealing material compatibility for a compatibility list for the most commonly used media.
Ambient conditions
EL-FLOW® Prestige instruments are suitable for use in conditions between -10 and 70 °C and relative humidity of 10 to 90 %
RH, unless specified otherwise. Please note that EL-FLOW® Prestige instruments have an ingress protection of IP-40,
implying that the electronics housing and electrical connection do not offer any protection against moist environments.
Make sure that process gases do not condensate in the instrument due to (changing) environmental conditions, condensed
process fluids may seriously harm the instrument's functionality! E.g. do not use moist air as process gas at low
temperatures.
2.3 Piping requirements
For reliable performance, make sure the fluid stream is uncontaminated.If necessary,
use filters to assure a moisture, oil and particle free gas stream ()recommended pore
size: 5 µm). If back flow can occur, the use of a downstream filter and check valve is
also recommended. Select a suitable filter size, to avoid a too high pressure drop.
Do not install small diameter piping on high flow rates and avoid abrupt angles or other disturbances within a distance of
10 pipe diameters from the inlet or outlet of the device.
Do not install pressure regulators within a distance of 25 pipe diameters.

Bronkhorst®
Instruction Manual EL-FLOW® Prestige9.17.084G 11
2.4 Mounting
·Install the EL-FLOW® Prestige in the process line, in accordance with the direction of
the FLOW arrow on the base of the instrument.
·Tighten connections according to the instructions of the supplier of the fittings. The
use of Swagelok RS-type stainless steel adapters is recommended.
The bottom side of the instrument is fitted with mounting holes for stable fixation. Refer to the dimensional drawing of the
instrument for the exact positions.
For optimal performance, please observe the following:
·The preferred mounting orientation of the EL-FLOW® Prestige is upright, especially if the operating pressure is higher
than 10 bar.
·Avoid installation in close proximity of mechanical vibration and/or heat sources.
2.5 Leak check
Check the system for leaks before applying pressure, especially if toxic, explosive or other dangerous fluids are used.
2.6 Electrical connection
Electrical connections must be made with standard cables or according to the
applicable hook-up diagrams (see section Other documents). The factory installed 9-
pin sub-D settings are indicated on the instrument label. Make sure that the power
supply is suitable for the power ratings as indicated on the instrument label, and that
double or reinforced insulation is used for the power supply cabling.
EL-FLOW® Prestige instruments are powered with +15…+24 Vdc. See section for
cabling examples.
Never power the instrument simultaneously from two different power sources (e.g. fieldbus connection and Plug-in
Power Supply). Doing so will damage the printed circuit board irreparably.
The device contains electronic components that are susceptible to damage by electrostatic discharge. Proper handling
procedures must be taken during installation, removing and connecting the electronics.
The device described in this manual carries the CE-mark and is compliant with the concerning EMC requirements.
However, compliance with the EMC requirements is not possible without the use of proper cables and connector/gland
assemblies. Bronkhorst recommends the use of their standard cables. These cables have the right connectors and if loose
ends are used, these are marked to help prevent wrong connection. When using other cables, cable wire diameters should
be sufficient to carry the supply current, and voltage loss must be kept as low as possible. When in doubt, contact your
distributor.
When connecting the product to other devices, be sure that the integrity of the shielding is not affected. Do not use
unshielded wire terminals.

Bronkhorst®
Instruction Manual EL-FLOW® Prestige 9.17.084G12
2.7 Analog / digital communication
2.7.1 Analog / local communication
If the instrument has a FLOW-BUS, Modbus or DeviceNet™ interface and is
configured for digital communication, the 9-pin sub-D connector is protected by
a dust cover. To gain access to the analog/local interface, the dust cover can be
removed by pushing its lower end.
Connect the EL-FLOW® Prestige to the power supply/readout unit using a cable with
9-pin sub-D connector.
2.7.2 Digital RS232 communication
Digital operation over RS232 can be established when using the following setup or
using a Bronkhorst® E-8000 readout/control unit. See section Basic RS232 operation 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 enables the use of the (free) Bronkhorst®
FlowWare software for Windows, such as FlowDDE and FlowPlot. Make sure that the
instrument label indicates RS232 settings for the 9-pin sub-D connector and apply the
proper baud rate settings. If the instrument is not set for RS232 communication, please
refer to Basic RS232 operation for switching to RS232 communication settings via the
'Configuration Mode'.
A PiPS (Plug-in Power Supply, art.nr.: 7.03.422) is available to power a single instrument and can be used instead of the
DB9 Loose-end cable as shown in the example above. Detailed information can be found in the manual PiPS (9.17.055)
which can be downloaded from http://www.bronkhorst.com/en/downloads
2.7.3 Digital RS485 / fieldbus communication
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 fieldbus driver (if
installed), see section Basic RS485 operation (FLOW-BUS/Modbus).
·For operation via other additional fieldbus systems (e.g. DeviceNet™, EtherCAT®), refer to section Other fieldbus
configurations or the specific fieldbus manual.
2.8 Micro switch operation
Using the two colored LEDs and the micro switch on the EL-FLOW® Prestige, 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, restoring factory settings and bus initialization
actions, if applicable.
·See section Adjusting zero point for background information about and
instructions for zeroing.
·See section Micro switch functions for a comprehensive description of the micro
switch functionality.
The micro switch on top of the EL-FLOW® Prestige can be operated with a thin, metal or hard plastic pin, e.g.the end of a
paperclip.

Bronkhorst®
Instruction Manual EL-FLOW® Prestige9.17.084G 13
2.9 Powering up and powering down
·It is recommended to turn on power before applying pressure and to switch off power after removing pressure.
·For best performance, allow the EL-FLOW® Prestige to warm up and stabilize for at least 30 minutes before starting
measurement and/or control. This may be done with or without media flow.
Be sure to apply the specified operating pressure(s) . Avoid pressure shocks and bring the fluidic system gradually up to the
level of operating conditions; open and close the fluid supply gently.
2.10 Purging before use
In systems for use with corrosive, reactive or explosive media, purging for at least 30 minutes with a dry, inert gas (like
Nitrogen or Argon) is absolutely necessary before use. After use with these media, complete purging is also required before
exposing the system to air.
2.11 Zeroing before use
The very first time the instrument is used, the zero point needs to be adjusted. See Adjusting zero point for background
information and instructions.
Procedure for zeroing with micro switch:
1. Warm-up the instrument, pressurize the system and fill the instrument according to the process conditions.
2. Make sure no flow is going through the instrument, by closing valves near the instrument.
3. The setpoint must be zero.
4. Press and hold the micro switch. 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 to 12 seconds after pressing) release the switch.
5. The zeroing procedure will start and the • green LED will blink fast. The procedure will take approximately 5 seconds.
6. When the indication is showing 0% signal and the • green indication LED is burning continuously again, then the
zeroing action was successful.
2.12 Calibration
The EL-FLOW® Prestige is factory calibrated. Bronkhorst certifies that the instrument meets the rated accuracy. Calibration is
performed using measurement standards traceable to the Dutch Metrology Institute (VSL). Calibration certificates are
included in the scope of delivery.
Periodical inspection, recalibration or verification of the accuracy may be subject to individual requirements of the end user.
2.13 Maintenance
No regular maintenance is required if the EL-FLOW® Prestige is operated properly, with clean media, compatible with the
wetted materials, avoiding pressure and thermal shocks and vibrations. Units may be purged with a clean, dry and inert gas.
In case of severe contamination, cleaning the inside of the device may be required. After cleaning, recalibration of the
instrument is recommended.
Inexpertly servicing instruments can lead to serious personal injury and/or damage to the instrument or the system it is
used in. Therefore, servicing must be performed by trained and qualified personnel. Contact Bronkhorst for information
about cleaning and calibration. Bronkhorst has a trained staff available.

Bronkhorst®
Instruction Manual EL-FLOW® Prestige 9.17.084G14
3Basic operation
3.1 Mass flow measurement and control
After correct installation of the EL-FLOW® Prestige Mass Flow Meter (MFM) or Mass Flow Controller (MFC) and when all
safety precautions have been taken into account 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:
EL-FLOW® Prestige MFMs/MFCs are most accurate at the specified inlet/outlet pressure, temperature and process gas
conditions, however the instrument will function properly in a wide range of varying conditions. It is strongly advised to use
the FlowTune™ 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 further).
Although EL-FLOW® Prestige MFMs/MFCs have excellent temperature stability, the best accuracy is achieved when
temperature gradients across the instruments are avoided; so make sure that the gas temperature equals the ambient
temperature and mount the instruments on a rigid (heat conducting) surface.
EL-FLOW® Prestige 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 with sufficient buffer volume between the
pressure regulator and the MFC and avoid installing multiple MFCs or other control valves in close proximity to another
with small volume piping in between.
When an MFC (either with normally closed (NC) or normally
opened (NO) valve) is hooked-up, the control valve stays
closed 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 fluid set, range or operating conditions
EL-FLOW® Prestige instruments provide Multi Fluid/Multi Range functionality (MFMR). With this functionality, the instrument
can be reconfigured with the properties of a selection of 25 pre-installed gases or any mixture thereof.
MFMR enabled instruments are calibrated ex factory for a number of standard measuring ranges, which can be configured
for use with other fluids. Changing fluid set and range can be done via RS232 with FlowTune™.
FlowTune™ provides the following key functionality:
·Storing up to eight different fluid sets in the instrument
·Storing fluid properties for any other gas
·Changing inlet- and/or outlet pressure according to actual process
conditions
·Re-ranging the full scale (FS) flow rate within the instrument's
supported flow range
·Changing control speed per fluid set for faster or slower (smoother)
flow control

Bronkhorst®
Instruction Manual EL-FLOW® Prestige9.17.084G 15
MFMR functionality is available for the full temperature and pressure range of the instrument. FlowTune™ checks the
changes for the following limitations:
·Rangeability of the flow sensor for the selected fluid
·Rangeability of the control valve for the selected fluid
·Accuracy indication for the given flow range
·Compatibility of selected gases with the used sealing materials (see also section Sealing material compatibility)
·Limitations to the operating conditions
After all limitation checks are passed, the entered properties are stored in the instrument, including the required controller
settings. When switching to another fluid set, controller settings are automatically adjusted to the new process conditions,
so there is no need to change PID controller settings manually.
The FlowTune™ software and the accompanying documentation can be downloaded from the product pages on the
Bronkhorst website: www.bronkhorst.com/products
To connect with FlowTune™, use RS232 communication via the 9-pin D-sub connector. In case a connection cannot be
established, use the power-up functionality of the multifunctional switch to switch to configuration mode and enable
RS232 communication.
After configuring the required parameters, remember to return the instrument to the original communication mode.
It is advised to use FlowTune™ only in a non-operational environment. FlowTune™ will force the instrument to Valve Safe
State as soon as the connection is made. Be sure to close communication between FlowTune™ and the instrument
properly, to restore the normal operating mode.
Using custom fluids or fluid properties
With FlowTune™ fixed fluid properties for any gas or mixture can be stored in the instrument (density, heat capacity,
thermal conductivity and dynamic viscosity). Although custom fluid data can be used, Bronkhorst advises to use the
FLUIDAT® on the Net website for calculation of fluid properties at the actual process conditions. FLUIDAT® is a collection of
routines to calculate physical properties of gases and liquids. These routines are made available at the FLUIDAT® on the Net
website.
FLUIDAT® ontheNet canbeaccessed viahttp://www.fluidat.com. You can try out FLUIDAT® on the Net with a limited
number of pre-selected fluids. Free registration gives access to all fluids and the full functionality. Registration is also
possible on the FLUIDAT® website.
3.1.2 Valve Safe State
When a controlling instrument is not powered, the control valve automatically returns to its 'Safe State', which is closed for
a 'normally closed' valve (n/c) and fully open for a 'normally opened' valve (n/o). See the serial number label or the technical
specifications to see which valve type is used on your EL-FLOW® Prestige (if applicable).
To protect the system, certain events may cause the instrument to fall in to Valve Safe State, e.g.:
·(fieldbus) communication errors (see LED indications)
·invalid fluid set configuration (see Fluid set)

Bronkhorst®
Instruction Manual EL-FLOW® Prestige 9.17.084G16
3.2 Communication interfaces
Numerous input/output options can be installed on EL-FLOW® Prestige instruments via both the 9-pin sub-D connector on
the side of the instrument and the optional fieldbus connector on top of the instrument.
Analog and RS232
(or RS485)
FLOW-BUS or Modbus
PROFIBUS DP
DeviceNet™
EtherCAT® or PROFINET
Via the 9-pin sub-D side connector the instrument can be operated by means of:
·Analog interface: 0…5 Vdc; 0…10 Vdc; 0…20 mA or 4…20 mA
·Digital RS232 interface: FLOW-BUS (Propar) protocol (see also document 9.17.027)
·Digital RS485 interface: Modbus RTU, Modbus ASCII or FLOW-BUS protocols
The following optional fieldbus interfaces can be installed on top of the instrument:
Fieldbus interface
Document no.
See section
·FLOW-BUS
9.17.024
Basic RS485 operation (FLOW-BUS/Modbus)
·Modbus (RTU/ASCII)
9.17.035
Basic RS485 operation (FLOW-BUS/Modbus)
·PROFIBUS DP
9.17.025
Other fieldbus configurations
·DeviceNet™
9.17.026
Other fieldbus configurations
·EtherCAT®
9.17.063
Other fieldbus configurations
·PROFINET
9.17.095
Other fieldbus configurations
3.2.1 Using multiple interfaces
The analog interface is always present on EL-FLOW® Prestige instruments. An interface to any available field bus is optional.
Operation via analog interface, RS232/RS485 (side connector) and an optional fieldbus (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 time and is indicated on the instrument label. The inactive setpoint source is indicated between
brackets (see example below). The parameter Control Mode indicates from which source a controller setpoint is accepted:
analog or digital. See section Special parameters for more information regarding the Control Mode parameter.
Factory communication settings
The factory selected communication and side connector pinning settings are indicated on the instrument label. See
example below for a description of the communication information:

Bronkhorst®
Instruction Manual EL-FLOW® Prestige9.17.084G 17
1. Model key
2. Fieldbus (top connector) (example: none)
3. Customized I/O setting (pin 5)
4. Analog interface (pin 2, 3) (example: inactive setpoint source, measure always
available)
5. Digital interface (pin 1, 6) (example: RS232, active setpoint source)
6. Side connector digital interface settings (protocol, medium, baud rate, parity)
(example: FLOW-BUS (ProPar) communication over RS232 interface with baud rate
115200 Baud and no parity)
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): pin 2
·Setpoint (analog input/setpoint): 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 and in the pin description on the instrument label.
Pin 5 is used for customized I/O configurations. By default it is disabled and pulled down to 0 Vdc. The factory selected pin 5
configuration can be found in the model key and the pin description on the instrument label. See also section Customized
I/O options (pin 5).
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 Cabling
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.
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 gas / multi range functionality; up to eight selectable and customizable fluids (Fluid set)
·Direct reading with a readout/control module or host computer
·Device identification and diagnostics (Device identification)
·Adjustable minimum and maximum alarm limits (Alarms)
·(Batch) counter (Counter)

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Instruction Manual EL-FLOW® Prestige 9.17.084G18
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 that the instrument label indicates RS232 settings for the 9-pin sub-D connector and apply the proper Baud rate
settings. If the instrument is not set for RS232 communication, use the micro switch on top of the instrument to overrule
the custom settings and switch to RS232 communication settings: press and hold the micro switch at power-up and wait
(12…16 sec) until both • green and • red LEDs flash (0.2 sec on, 0.2 sec off). Release the switch to activate the
‘Configuration Mode’. In the ‘Configuration Mode’ the bus type and baud rate for the 9-pin sub-D side connector are set to
RS232 FLOW-BUS (ProPar) at 38400 Baud. The ‘Configuration Mode’ remains active after power down. Use the same
procedure to deactivate the ‘Configuration Mode’.
3.4.1 Cabling
A special T-part cable (7.03.366) is required for connecting the
9-pin sub-D side connector of an EL-FLOW® Prestige
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 micro controller 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 cable 7.03.367. The figure on the right
shows a hook-up example for DeviceNet™.
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.
E-8000
When an EL-FLOW® Prestige 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.

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Instruction Manual EL-FLOW® Prestige9.17.084G 19
BRIGHT
When an EL-FLOW® Prestige 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
Digital Bronkhorst® instruments can be operated via RS232 using the Bronkhorst® FlowDDE server application. Dynamic
Data Exchange (DDE) provides a basic level of inter process communication between Windows applications. Together with a
client application, either self-made or with a third party SCADA program, it is possible to create an easy way of data
exchange between the flow meter/controller and a Windows application. For instance, a cell in a Microsoft Excel
spreadsheet can be linked to the measured value of an instrument; FlowDDE updates the cell automatically when the
measured value changes.
FlowDDE uses 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. FlowDDE translates the node-address and process number to a channel number.
DDE-client applications communicate with 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.
When not using FlowDDE for communication with the
instrument, parameters are addressed by:
·Node address of the instrument
·Process number on the instrument
·Parameter number on the instrument
See section Basic parameters and properties for more
information about instrument parameters.
For more information about FlowDDE, including setting up a DDE link, consult the FlowDDE Manual (document no.
9.17.067) or the help file in the application.

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Instruction Manual EL-FLOW® Prestige 9.17.084G20
3.4.3 Software (DDE applications)
Examples of free Bronkhorst® DDE client applications: 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)
FlowDDE and other Bronkhorst® applications are available on the support CD or can be downloaded from the product
pages on the Bronkhorst website: www.bronkhorst.com/products
3.4.4 Baud rate setup
EL-FLOW® Prestige instruments support the following baud rates for RS232 communication. The factory selected baud rate
is indicated on the instrument label. See section Network configuration 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 (ProPar)
Baud rate:
9600
16200
38400
57600
115200
230400
460800
Node address:
3
Parity:
None
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.
For more information regarding communication through an RS232 interface, see document 9.17.027: RS232 interface
with FLOW-BUS for digital instruments.