Omega Products FST1000 Installation Manual

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FST1000 SERIES

Air Flow Switch With Two SPST

Relay Contact Closures

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User’s Guide

Servicing North America:

U.S.A.: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047

ISO 9001 Certified Stamford, CT 06907-0047 USA

Toll Free: 1-800-826-6342 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

Canada: 976 Bergar

Laval (Quebec), H7L 5A1 Canada
Toll-Free: 1-800-826-6342 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

For immediate technical or application assistance:

U.S.A. and Canada: Sales Service: 1-800-826-6342/1-800-TC-OMEGA

®

Customer Service: 1-800-622-2378/1-800-622-BEST

®

Engineering Service: 1-800-872-9436/1-800-USA-WHEN

®

Mexico/ En Español: 001 [phone] FAX: [phone]
Latin America: [e-mail] e-mail: [e-mail]

Servicing Europe:

Benelux: Managed by the United Kingdom Office

Toll-Free: 0800 099 3344 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

Czech Republic: Frystatska 184

733 01 Karviná, Czech Republic
Toll-Free: 0800-1-66342 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

France: Managed by the United Kingdom Office

Toll-Free: 0800 466 342 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

Germany/Austria: Daimlerstrasse 26

D-75392 Deckenpfronn, Germany
Toll-Free: 0800 6397678 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

United Kingdom: OMEGA Engineering Ltd.

ISO 9001 Certified One Omega Drive, River Bend Technology Centre, Northbank

Irlam, Manchester M44 5BD United Kingdom
Toll-Free: 0800-488-488 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

OMEGAnet®Online Service Internet e-mail

omega.com [e-mail]

It is the policy of OMEGA Engineering, Inc. to comply with all worldwide safety and EMC/EMI
regulations that apply. OMEGA is constantly pursuing certification of its products to the European New
Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.

The information contained in this document is believed to be correct, but OMEGA accepts no liability for any
errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, human applications.

i

FST1000 SERIES

Air Flow Switch With Two SPST Relay Contact Closures

Table of Contents

Section Page

Section 1 - Introduction ....................................................................................... 1-1

Section 2 - Installation ......................................................................................... 2-1

Section 3 - Operations ......................................................................................... 3-1

Maintenance ..................................................................................................... 3-1

Calibration ........................................................................................................ 3-1

Section 4 - Specifications ................................................................................... 4-1

ii

FST1000 SERIES
Air Flow Switch With Two SPST Relay Contact Closures

List of Figures

Figure Description Page

Table 1 Piping Requirement ............................................................................ 2-2

2-1 FST1000 Back Plate View ................................................................... 2-3

2-2 Typical Wiring Diagram .................................................................... 2-3

2-3 FST1000 Fixed Mount Probe, General Dimensions ....................... 2-4

2-4 FST1000 Remote Probe ...................................................................... 2-4

Section 1 - Introduction

The FST1000 series measures air velocities up to 10,000 FPM (50.8 m/sec) and
provides two SPST relay contact closures corresponding to high and low alarm
set points. The alarm set points are adjustable from 0 to 100% of the air flow
range. This unit can be used in HVAC applications, R&D labs, exhaust/
ventilation hoods and other manufacturing processes.

The sensor is designed based on RTD elements. The air velocity is measured by
the heat loss from the RTD sensor as it cools down by the air flow. The sensor is
housed in a 1/4" OD x 12" long 304 Stainless Steel tube with inch marks for ease
of insertion depths. The sensor probe comes in two configurations:

• Fixed mount probe

• 12" long remote probe connected via 15 feet of shielded cable

The following table shows all the models of this product.

Model No. Range FPM (m/sec) Description

FST1001A 0 to 5000 (0 to 25.4) Air velocity switch,

2 relay outputs, fixed probe

FST1001R 0 to 5000 (0 to 25.4) Air velocity switch, 2 relay

outputs, remote probe

FST1002A 0 to 10,000 (0 to 50.8) Air velocity switch, 2 relay

outputs, fixed probe

FST1002R 0 to 10,000 (0 to 50.8) Air velocity switch, 2 relay

outputs, remote probe

The FST1000 air velocity switch is not explosion proof, nor is
it intrinsically safe. Do not use for flammable or hazardous
gases, or in Hazardous areas.

The FST1000 series air velocity switch is intended for use with clean air or
Nitrogen ONLY. Do not use with other gases, as it will produce an error in
measurement. In addition, air carrying dust or oil (such as found in blower/
compressor systems that utilize oil) can lead to coating of the sensor and thus
inaccurate readings.

Refer to the Maintenance section for information on cleaning the sensor. The
FST1000 is a bi-directional device, meaning the air flow in the forward or reverse
direction provides the same readings. The FST1000 can be mounted vertically or
horizontally without shift in calibration.

1-1

Introduction

1

NOTE: