Omega Products HX71-V2-NB Installation Manual

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HX71 SERIES

RH Probe/Transmitter

User’s Guide

HX71-NB
MODEL

HX71 MODEL

Servicing North America:

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

ISO 9001 Certified

Stamford, CT 06907-0047
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.
WAR NING: These products are not designed for use in, and should not be used for, human applications.

TABLE OF

CONTENTS

HX71 SERIES

RH Probe/Transmitter

i

Section Page

1. General Description .................................................................... 1

2. Unpacking .................................................................................... 1

3. Theory of Operation ................................................................... 2

4. Installation and Mounting ..................................................... 3-4

5. Electrical Connections ................................................................ 5

6. Wiring Examples ........................................................................ 6

7. Relative Humidity Output Calculations ................................ 6

8. RH Measured Vs Output Reading Table ................................. 7

9. Calibration and Maintenance..................................................... 8

10. Specifications ............................................................................... 9

FIGURES

HX71 SERIES
RH Probe/Transmitter

ii

Figure Page

Figure 1 Basic Transmitter Set-up

With Current Loop Output .............................................. 2

Figure 2 HX71 Dimensions .............................................................. 3

Figure 3 HX71 Mounting ................................................................ 3

Figure 4 HX71-NB Dimensions and Mounting ........................... 4

Figure 5 Current Transmitter Wiring Example

(4-20 mA) ............................................................................ 6

Figure 6 Voltage Transmitter Wiring Example

(0-1 Vdc and 0-5 Vdc) ....................................................... 6

1

General Description

1

1. General Description

The OMEGA®HX71 Series Relative Humidity Transmitter’s provide a
linearized and temperature compensated output signal of 4 to 20 mA, 0 to
1 Vdc or 0 to 5 Vdc depending upon the model selected. The output signal
has been calibrated and scaled 0 to 100% for Relative Humidity. A thin film
polymer capacitor senses relative humidity and is protected by a stainless
steel cap that is easily removed for cleaning. The Nema-4 stainless steel
enclosure and cable entry connection provides weathertight protection.

2. Unpacking

Remove the packing list and verify that you have received all your
equipment. If you have any questions about the shipment, please call
our Customer Service Department at:

1-800-622-2378 or 203-359-1660. On the web you can find us at:
omega.com e-mail: [e-mail]

When you receive the shipment, inspect the container and equipment
for any signs of damage. Note any evidence of rough handling in
transit. Immediately report any damage to the shipping agent.

The carrier will not honor any damage claims unless all shipping material
is saved for inspection. After examining and removing contents, save
packing material and carton in the event reshipment is necessary.

The following items are supplied in the box with your HX71 transmitter.

• This Manual, # M-4543 (1 ea.)

• Dewpoint Card (1 ea.)

Recommended Power Supply

For HX71-MA and HX71-MA-NB, Omega Model PST-10
For HX71-V1, HX71-V2, HX71-V1-NB and HX71-V2-NB: Omega Model
FPW-15

Complimentary Instruments

iSeries

®

Panel Meters and Controllers

Recommended Accessories

Duct/Wall Mounting Kit, OMEGA®Part No.: HX70-MKIT (For HX71­MA, HX71-V1, HX71-V2)
Transmitter Cable, OMEGA

®

Part No.: TX4-100 (100 ft)

RH Calibration Kit, OMEGA

®

Part No.: HX92-CAL

NOTE