Omega RH32 Basic Instructions

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United Kingdom: OMEGA Engineering Ltd.

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

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

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’s 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 malfunctions, 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 in which wear is not warranted, include but are 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
following information 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
relative 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 2009 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

FOR NON-WARRANTY REPAIRS,

consult OMEGA
for current repair 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.

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA…Of Course!

Shop online at omega.com

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M4818/1009

INST.No.INE-418-1P1CE

Request and n otices

Please read this instruction manual for using this “Temperature/humidity meter”
correctly and safely.

Request t o instrumentati on manufacturers, i nstallation contract ors, a nd
sales ag ent s

Make sure to deliver this instruction manual to the operator of this “Temperature/humidity
meter”.

Request to the op erat o r of th i s temp er atu re /hu mid ity me ter

This instruction manual is ne cessary for main tenan ce, too.
Keep this manual with due care until thi s “Temperature/humidity meter” is disca rded．

Notices

1. The descriptions of this manual are subject to change without notice.

2. If a question has arisen or if an omission was found in this manual, please
contact your nearest OMEGA’s agent.

3. We are not responsible for any results by operation of this “Temperature/humidity
meter”.

-Preface 1-

INST.No.INE-418-1P1CE

-Preface 2-

Important notices

 The instruction manual for the RH32 series p alm-sized temperatur e/ humi dit y met er is consi sted of Vol. 1 [Basic instructions] and

Vol. 2 [Function instructions].
This instruction manual is V o l. 1 [Basic instructions].

For “Measurement and data storage”, “Stored data reading” and “Parameter programming”, etc., refer to V ol. 2 [Function instructions].

 [Auto-power-off function]

For avoiding the comsumption of the batteries, the aut o-pow er-off funct ion
of this “temperature/humiditymeter” has been set at O N (active) as a factor y
default setting. If no key is pressed for 1 minute, the continuous measurement
will automatically stop and the mode will move to the clock mode.

For setting of the auto-power-off function to OFF:
Press DISP key to go to the continuous measurement mode ( Ref. [1.1Continuous
measurement] an d then press DISP key again for about 2 seconds t o go to
the programming mode. In the programming mode, press DISP key several
times to go to the auto-power-off selection mode with “Auto” lit in the sub
display. In the auto-power-off selection mode, “on” (active) will flash in the
main display 2. For releasing the auto-power-off function, select “oFF”

(release) by pressing ∧ key or ∨ key. Press ENT key to retain “oFF”
selected. The flashing of “oFF ”will stop.

 For the RS-232C communications with Model RH32-C2 (RS-232C

communications type), the use of the AC power adapter (RH32-AC110 - sold
separately) is recommended to a void the consumption of the batteries.

 Also, for the RS-485 communications with Model RH32-C4 (RS-485

communications type), make sure to use the AC power adapter
(RH32-AC110 - sold separately) a s the batteries will be consumed very rap­idly .

READ

LOG TIME UNIT ALARM

TERM

REP

INT REF

LOCK

°

F

℃

°FH

℃

H

%RH

Clock mode

READ

LOG TIME UNIT A LARM

TERM

REP

INT REF

LOCK

°

F

℃

°FH

℃

H

%RH

Auto-power-off selection mode

INST.No.INE-418-1P1CE

-Preface 3-

Wa rning and safety notices

Ensure the following instructions to use this meter correctly.

Warning (For avoiding unexpected dangerous accidents of death or serious injury)

◆ Don’t use this meter in places where explosive gas exists.

◆ If this meter is smoking, nasty smelling or abnormal noising, remove batteries f rom it or pull o ut an AC

power adapter (RH32-AC110) (if used) from a receptacle as quickly as possible, and then contact your
OMEGA ’s agent.

◆ Don’t throw out batteries in fire. Don’t charge, short circuit, heat or disassemble them.
It will cause a fire or an injury by blowing-out or heat.

◆ For the AC power adapter , use the power voltage of 100 to 240V.
Don’t touch the AC power adapter or the receptacle by wet hands. It will cause an electric shock, a fire

or a failure.

Wipe out dusts from the AC power adapter to prevent fires.

◆ Don’t touch the inside of the case by wet hands.

◆ Don’t repair or modify it.

◆ Check the specifications of batteries. Use AA (UM-3) batteries.

◆ Don’t use it under failed conditions.

！

！

！

！

！

！

！

！

INST.No.INE-418-1P1CE

Contents

Palm-sized tempera tur e/humidit y meter <Vol.1 [Basic in structio ns]>
Request and notices
Importance notices
Warning and safety notices

1. Introduction·························································1

1.1 Outl in e ··································································1

1.2 Co nfiguration······ ·············· ··············· ·············· ········1

2. Model and accessories ·······································3

2.1 Model·····································································3

2.2 Access ories·····························································3

3. Overviews and functions····································4

3.1 Overviews and functions : Front view ···················4

3.2 Overviews and functions : Side v iew·····················4

3.3 Display··································································6

4. Installation···························································8

4.1 Using as a handhel d type·······································8

4.2 Using as a wall instal l a tion type·····························9

4.3 Usi ng as a deskt op i nstal l ati on ty pe·····················10

5.2.4 Retaining of hour ···························· ·············· 14

5.2.5 Retaining of minute··· ································ ···· 14

5.2.6 Retaining of year··········································· 14

5.2.7 Retaining of clo ck················ ························· 14

5.3 Measurement preparation···································16

5.3.1 Measure men t un it selection mode················· 16

5.3.2 Temperature measurement unit····················· 16

6. Continuous measurement······························ 18

6.1 Continuous measurement mode·························18

6.2 Measured temperature/humidity display range···19

7. Repl ac emen t of tem pe rat ur e /hu mid it y se ns or20

8. Working environment···································· 23

9. Troubleshooting··············································· 24

10. Specifications················································· 26

5. Measurement for preparation························11

5.1 Loadin g of bat te ry (AA=UM-3)··························11

5.2 Clock adj us tment of cl ock···································13

5.2.1 Cl ock adj ust men t mode·····································13

5.2.2 R etai ni ng of month············································13

5.2.3 R etai ni ng of day················································13

11. External dimensions····································· 27

11.1 Ex ternal dimensions of RH32B-C··················27

11.2 External dimensions of RH32P-C ··················28

11.3 External dimensions of RH32S-C ··················28

-Content-

INST.No.INE-418-1P1CE

-1-

LOG ALARM

LOCK

℃

%RH

SHIFT

LOCK

DISP

LOG

ENT

1. 1 Outline

The RH32 series is a high performance and highly reliable palm-sized temperature/humidity meter for the measurement of
temperature and humidity of 0 to 100%R H using a c apacitance t ype humidity se nsor.
The meter has two major functions, “measurement of te m perature a nd humidity” and “data logging of maximum 8000 data of
both temperature and hu midity” (Refer to the separated instruction manual Vol. 2 <Function instructions>). In addition, by
using a data logging software packa ge (sol d separately), easy data processing by a PC is available .

1.2 Configuration

1. Introduction

* For the RS-485 communications with Model RH32-C4 (RS-485 communications type), make sure to

use the AC power adapter (R H32-AC1 10 - sold separately) as the batteries will be cons umed very rapidly.

Caution

Built - in type sensor
RH32B-RP

AC power adapter
RH32-AC1 10*

T emperature/humidity meter

RH32B-C2
RH32P-C2
RH32S-C2
RH32B-C4 *
RH32P-C4 *
RH32S-C4 *

Separated type sensor
RH32S-RP

RS-232C
communications cable
RH32-S2-CABLE Note)

RS-485
communications cable
RH32-S4-CABLE* Note)

Probe type
sensor
RH32P-RP

Data logging
software packag e
RH32-SW1 Note)
RH32-SW2 Note)

Note : Sold se pa rately

INST.No.INE-418-1P1CE

-2-

conformance

Palm-sized temperature/humidity meter

RH32B-C2，RH32P-C2，RH32S-C2，
RH32B-C4，RH32P-C4，RH32S-C4

Directive

89/336/EEC，92/31/EEC amendmen t，

93/68/EEC amendment

Standard

EN61326+A1: Emission class B，

Immunity Table1
(Minimum immunity test requirements)

Conformance condition

RH32B-C4：The connection cable is to be used indoor

and within 30m.

RH32S-C4，RH32P-C4：The connection cable is to be

within 3m.

Stability under the test environment of EMC directive
Temperature ±0.5ºC
Relative humidity ±3%RH

AC power adapter

RH32-AC11 0

EMI standard

Meets the conduction limit of : FCC Class B EN61000-3-2

EN55022 B EN61000-3-3
VCCI II

EMS EN50082-1

IEC801-2 Level3
IEC801-3
IEC801-4

INST.No.INE-418-1P1CE

-3-

2.1 Model

RH32 -C

Temperature/humidity sensor
B: Built-in type
P: Probe type (Cable length: 1.5m)
S: Separated type (Cable length: 1.5m)

Communications interface
2: RS-232C
4: RS-485

2.2 Accessories

Accessories Qty. Remarks
Desktop attachment 1
AA (UM-3) al kaline battery 2
Vol.1 Basic instructions 1 This manual
Vol.2 Function instructions 1 Separate manual

2. Model and accessories