Omega Products HX49 Installation Manual

Humidity Transducer

HX49

M2606/0303

SPECIFICATIONS

Accur acy*: ± 2%

Range: 0 to 100%

Hysteresis: ± 1%

Supply Voltage: 12 to 40

transducers only (24 VDC recommended)

Supply Current: 10
transducers; 20

Enclosure: 18 Ga. C. R. steel NEMA-4 (IP-65) or ABS plastic

Finish: Baked on enamel PMS2GR88B or off-white

Conformance: EMC Standards EN50082-1(1992)

EN55014(1993)/EN60730-1(1992)

Compensated Temperature Range: -30°
55°

)

C

Environmental: 10 to 90% RH

Te rm in a ti o n: Unpluggable screw terminal block

Wire Size: 12 Ga. maximum

Load Impedance: 3K ohms maximum at 40

transducers); 1K ohms minimum (

Weight: Duct mount: 1.0 lb. (.45 kg); Wall mount: 0.5 lbs.
(.25 kg)

Includes nonlinearity and non-repeatability.

*

(10 to 90%

RH

RH

M

maximum for MA output transducers

A

)

RH

; 12 to 35

VDC

M

maximum for

A

VAC VDC

to 130°F (-35°C to

F

non-condensing

VDC

output tran sducers)

VDC

output

output

VDC

(MA output

4. If using a controller/meter with an internal

power supply, connect the controller/
meter input signal to the [+] terminal.
Connect the controller /meter common to the [ -]
terminal.

5. Reinsert the terminal block onto the circuit board and

apply power to the transducer.

6. Check for the appropriate output signal using a digital

voltmeter set to DC milliamps connected in series to
the [-] term inal.

7. Replace the cover and screws.

Wiring for VDC Output:

1. Remove the two cover screws. Pull off the cover and

set aside.

2. Carefully remove the blue terminal block. Note the

block’s terminal markings on the circuit board.

3. Connect the power supply voltage wire to the [+]

terminal and the power sup ply common to the [-]
terminal.

4. Connect the controller/meter input wire to the [0]

terminal and the controller/meter common wire to the
[-] terminal.

CALIBRATION

All transducers are factory calibrated to meet or exceed
published specifications. If field adjustment is necessary,
follow these instructions:

1. Do not verify comparative RH with a sling

psychrometer. Doing so can introduce errors into the
calibration process. New humidity transducers are
already calibrated.

2. Recalibrate the humidity in a controlled environment

only. Relative humidity must be held stable while
making any adjustment.

3. Verify the output from the transdu cer directly with

calibrated instrumentation. Verify the RH with
calibrated instrumentation, not a controlle r output.
With the correct power applied and only a meter
connected to the output of the transducer, ensure that
the output is proportional to th e true RH.

4a.Single-point Calibration

Select either option 1 or option 2:
Option 1: Select a controlled humidity environment
between 10 to 40% RH. Ensure humidity is stable and
adjust the zero trimmer [Z].
Option 2: Select a controlled humidity environment
between 40 to 70% RH. Ensure humidity is stable and
adjust the span trimmer [S].

4b.Two-point Calibration

Select a controlled humidity environment between 10
and 40% RH. Ensure humidity is stable and adjust the
zero trimmer [Z]. Then select a controlled humidity
environment between 70 and 75% RH. Ensure humidity
is stable and adjust the span trimmer [S].

DIMENSIONS

INSTALLATION PRECAUTIONS

Disconnect the power supply before installing the transducer.
Failure to do so can result in electrical shock and equipment
damage.

Make all connections in accordance with the job wiring
diagram and national and local electrical codes. Use only
copper conductors.

Use electrostatic discharge precautions such as wrist straps
when installing and wiring the transducer.

Do not exceed ratings for the transducer.

If using grounded AC, ensure that the hot wire is on the [+]
terminal. Also, if using a controller without built-in isolation,
use an isolation transformer to supply the transducer.

This transducer contains a half-wave rectifier power supply
and must not be powered from transformers powering other
devices with non-isolated full-wave rectifier power supplies.

When multiple transducers are powered from the same
transformer, damage will result unless all 24-gage power
leads are connected to the same power lead on all
transducers. Maintain the correct phasing when powering
more than one transducer from a single transformer.

WIRING

Use maximum 12

M

output transducer must be powered with a 12 - 40

The

A

power supply. The
for 0 - 5

VDC

either 12 - 40

Wiring for mA Output:

1. Remove the two cover screws. Pull off the cover and

set aside.

2. Carefully remove the blue terminal block. Note the

block’s terminal markings on the circuit board.

3. If using an external power supply, connect the supply

voltage wire to the [+] terminal. Connect the power
supply common to the common bus of the controller/
meter. Connect th e input signal of the controller/meter
to the [-] te rminal.

wire for wiring terminals.

AWG

output transducer is field selectable

VDC

or 0 - 10

VDC

output and can be powered with

VDC

or 12 - 35

VAC

VDC

.

5. Reinsert the terminal block onto the circuit board and

apply power to the transducer.

6. Check the appropriate VDC output using a di gital

voltmeter set to DC volts connected to the [0] and [-]
terminals.

7. Replace the cover and screws.

JUMPER CONFIGURATIONS
(VDC Output Only)

Jumper config uration varies by transducer model (wall or
duct mount) and VDC output (0 - 5 or 0 - 10

Jumper Configurat ions for Wall

Mount Transducers—W

Jumper Configurations for Duct

Mount Transducers—D

VDC

).

Servicing Europe:

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Service

Online

Internet e-mail

[e-mail]

www.omega.com

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TEL: [phone] FAX: [phone]
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For immediate technical or application

assistance:

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Benelux:

Czech Republic:

France:

Germany/Austria:

United Kingdom:

ISO 9002 Certified

SM

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[e-mail]

SM

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Toll Free in Benelux: 06 0993344
e-mail: [e-mail]

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e-mail: [e-mail]

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

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It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is constantly
pursuing certification of its products in 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 Engineering, Inc. 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, patient connected applications.

WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEGA
Warranty adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that
OMEGA’s customers receive maximum coverage on each product.

If the unit should malfunction, it must be returned to the factory for evaluation. OMEGA’s Customer Service Department will issue an Authorized Return (AR) number
immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no charge. OMEGA’s
WARRANTY does not apply to defects resulting from any action of the purchaser, including but not limited to mishandling, improper interfacing, operation outside
of design limits, improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows
evidence of having been damaged as a result of excessive corrosion; or current, heat, moisture or vibration; improper specification; misapplication; misuse or other
operating conditions outside of OMEGA’s control. Components which wear are not warranted, including but not limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA neither assumes responsibility for any omissions or
errors nor assumes liability for any damages that result from the use of its products in accordance with information provided by OMEGA, either
verbal or written. OMEGA warrants only that the parts manufactured by it will be as specified and free of defects. OMEGA MAKES NO OTHER
WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED
WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED.
LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of OMEGA with respect to this order,
whether based on contract, warranty, negligence, indemnification, strict liability or otherwise, shall not exceed the purchase price of the
component upon which liability is based. In no event shall OMEGA be liable for consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic Component” under 10 CFR 21 (NRC), used in or with any
nuclear installation or activity; or (2) in medical applications or used on humans. Should any Product(s) be used in or with any nuclear installation or activity, medical
application, used on humans, or misused in any way, OMEGA assumes no responsibility as set forth in our basic WARRANTY / DISCLAIMER language, and,
additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product(s) in such a
manner.

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER
MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING DELAYS). The
assigned AR number should then be marked on the outside of the return package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in transit.

FOR WARRANTY
available BEFORE contacting OMEGA:

1.

Purchase Order number under which the product was
PURCHASED,

2.

Model and serial number of the product under warranty, and

3.

Repair instructions and/or specific problems relati ve to the
product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords our customers the latest
in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2003 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, reproduced, translated, or
reduced to any electronic medium or machine-readable form, in whole or in part, without the prior written consent of OMEGA ENGINEERING,
INC.

RETURNS, please have the following information

FOR NON-WARRANTY
charges. Have the following information available BEFORE contacting
OMEGA:

1.

Purchase Order number to cover the COST of the repair,

2.

Model and serial number of the product, and

3.

Repair instructions and/or specific problems relative to the
product.

REPAIRS, consult OMEGA for current repair