Omega RH32 Basic Instructions

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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.

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OMEGA…Of Course!

Shop online at omega.com

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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

INST.No.INE-418-1P1CE

-4-

3.1 Overviews and functions : Front view

Article Function
(1) T emperature/humidity

sensor

T emperature and humidity sensors built-in

(2) DISP (LOCK) ke y

T o go to the continuous meas urement mode or the

programming mode from clock mode, or to set
the key lock function

(3) ENT (LOG) key

To retain the parameter programmed, or to
start/stop data logging

(4) ∧ (SHIFT) key

To increase a numerical figure and shift a key
function.

(5) ∨ key

To decrease a numerical figure in the program­ming mo de

READLOG TIME UNIT ALARM

TERM

REP

INT REF

LOCK

°

F

℃

°FH

℃

H

%RH

SHIFT

LOCK

DISP

LOG

ENT

(1)

(2)

(3)

(4)

(5)

3. Overviews and functions

(The figures shown are for Model RH32B-C. For Model RH32P-C and

Model RH32S-C, refer to [11.2 External dimensions of RH32P-C] and
[11.3 External dimensions of RH32S-C].)

INST.No.INE-418-1P1CE

-5-

3.2 Overviews and functions : Side view

(The figures shown are for Model RH32B-C. For Models RH32P-C and RH32S-C, refer to [11.2 External
dimensions of RH32P-C] and [1 1.3 External dime nsions of RH32S-C ].)

Article Function
(6)Hole for strap The hole for attaching a strap

(7)Cover for AC

power
adapter jack

The cover for the jack to connect the AC pow­er adapter (RH32-AC110)
For opening the cover, pull up it from the low­er side.

(8)Cover for

communica­tions jack

The cover for the jack to connect the RS-232C
communications cable (RH32-S2-CABLE) or
the RS-485communications cable
(RH32-S4-CABLE). For opening the cover,
pull up it from the lower side.

(9)Hole for wall

installation

The hole for hooking this meter to a wall using
a M4 screw or a nail

(10)Battery

cover

The cover for the AA battery compartment.
For opening it, push it upward by picking up
the nail of a lower part.

(11)Holes for

desktop
attachment

The holes for mounting the attachment for the
desktop installation.

(6)

(7)

(8)

(9)

(10)

(11)

3. Overviews and functions

INST.No.INE-418-1P1CE

-6-

3.3 Display

3. Overviews and functions

READLOG TIME UNIT ALARM

TERM

REP

INT RE F

LOCK

°

F

℃

°FH

℃

H

%RH

(2) Month/day

(3) Sub display

(4) Main display 1

(5) Main disp lay 2

(1) Main marker

(1) Main marker

(6) T emperature measurement unit

(7) Humidity measurement

unit/totalized

temperature measurement
unit

(8) Low battery mark

INST.No.INE-418-1P1CE

-7-

LOG

Data storage

Lights during manual or automatic storage

READ

Reading

Lights when stored data are read.

TIME

Month/day/hour/minute

Lights when year, month, day and time are programmed.
Lights in endless storage by using the data logging software package
(sold separately).

UNIT

Temperature measurement unit
/humidity measurement unit

Lights when the temperature measurement unit (ºC/ºF) or the relative humid­ity/the dew-point temperature measurement unit (%RH/ºC/ºF) is set.

ALARM

Alarm

Lights when an alarm is activated or alarm setpoints are programmed.

TERM

Start/stop

Lights when storage start and stop time of the automatic storage are
programmed.

REP

Repetition

Lights when storage repetition is programmed.

INT

Interval time

Lights when storing interval is programmed.

(1)Main

marker

REF

Totalizing reference

Lights when totalizing reference temperature is programmed.

(2) Month/day Month/day

Displays month and day.

(3) Sub display

Hour/minute and
parameter item

Displays hour and minute when “TIME” or “TERM” lights in the main marker,
or displays a parameter item in other cases.

(4) Main display 1 Temperature measured value

Displays measured temperature or totalized temperature.

(5) Main display 2 Humidity measured value

Displays measured relative humidity, measured dew-point temperature, or

totalized temperature.

ºC

Lights when measured temperature is displayed in ºC.

(6) Temperature

measurement unit

ºF

Lights when measured temperature is displayed in ºF.

%RH

Relative humidity

Lights when relative humidity is displayed.

º CH

ºC/ºCH

ºC lights when dew-point temperature and ºC temperature are displayed.
ºCH lights when totalized temperature and ºC temperature are displayed.

(7) Humidity

measurement
unit/totalized
temperature
measurement
unit

º FH

ºF/ ºFH

ºF lights when dew-point temperature and ºF temperature are displayed.
ºFH lights when totalized temperature and ºF temperature are displayed.

(8) Low battery

mark

Low battery mark

Lights when battery voltage becomes lower.

3. Overviews and functions

INST.No.INE-418-1P1CE

-8-

4.1 Using as a handheld type

When this meter is used as a handheld type, be careful not to cover the temperature/humidity sensor by hands or not to touch it

by fingers. For the built-in type sensor, make sure to hold the lower half o f t his m ete r.

If the temperature/humidity sensor is covered by hands or touched by fingers, accurate tempera­ture/humidity measurement is not possible.

LOG ALARM

LOCK

℃

%RH

SHIFT

LOCK

DISP

LOG

ENT

T empera ture/hum idity sensor

Hold lower than this position.

4. Installation

Caution

INST.No.INE-418-1P1CE

-9-

4.2 Using as a wall installation type

When this meter is used as a wall installation type, hook the wall installation hole on the backside of thi s meter to a M4 sc rew or
a nail mounted to the wall.

4. Installation

Wall installation hole

INST.No.INE-418-1P1CE

-10-

4.3 Using as a desktop installation type

When this meter is used as a desktop installation type, insert the desktop attachment to the holes for the desktop installation.

4. Installation

Desktop attachment

Hole for desktop attachment

INST.No.INE-418-1P1CE

-1 1-

5.1 Loading of battery (AA=UM-3)

This meter is operated by two AA (UM-3) alkaline batteries.

Open the battery cover and load the batteries with correct polarities.

Note : Sold separately

5. Measurement preparation

For opening the battery cover,
push it lightly upward by lifting
up the nail.

In operation of this meter with the AC power adapter (RH32-AC110* Note) only, the loading of the
batteries is not required.

+ polarity

+ polarity

Load the batteries with correct polarities.

Reference

Caution

INST.No.INE-418-1P1CE

-12-

After the loading of the new batteries, month and day are displayed in
the month/day display part, and hour and minute are displayed in the
sub display .

 Battery life

 When the battery voltage becomes lower, the low battery mark will light. Replace the batteries with new ones.
 If you use this meter with the low battery mark be ing lit, “Er4” w ill be displayed in the main dis play 2.

Replace the batteries with new ones.

 When any d isplays are not sh own, the batteries voltage becomes lower. Replace the batteries with new ones.

 Battery repla cement

Replace 2 batteries together .

 Battery polari ties

Load the batteries with correct polarities.

 When the AC power adapter is used:

 The low battery mark will no t light.
 If “Er4” displays in the main display 2, take t he following procedures.

1)Remove the AC power adapter from this meter.

2)After then, take off the batteries or replace them into new ones.

3)Connect the AC power batteries again.

Note

)

The clock will stop (reset) by the above procedure, adjust the clock. (Refer to [5.2 Clock a

d

j

ustment].

)

5. Measurement preparation

 Stop of cl ock in battery replacement

When the clock stops in the battery

replacement, the clock will start from
0 hour 00 minute, January 1

st

, 2001 after the

loading of the new batteries.

READ

LOG TIME UNIT ALARM

TERM

REP

INT REF

LOCK

°

F

℃

°FH

℃

H

%RH

Month/day
display part

Sub display

Low battery mark

Caution

Reference

INST.No.INE-418-1P1CE

-13-

5.2 Clock adjustm ent

5.2.1 Clock adjustment mode

In the continuous measurement mode, press DISP key for 2 seconds to go
to the stored data reading mode with “RE AD” lit in the main marker. Press

DISP

key again several times to go to the clock adjustment mode. In the

clock adjustment mode, “TIME” will light in the main marker and “month”
will flash.

5.2.2 Retaining of month

Select the “month” by pressing ∧ key or ∨ key .
By pressing ENT key, the month selected will be retained
and “day” will flash.

5.2.3 Retain ing of day

Select the “day” by pressing ∧ key or ∨ key.
By pressing ENT key, the day selected will be retained and
“hour” will flash.

5. Measurement preparation

READ

LOG TIME UNIT ALARM

TERM

REP

INT REF

LOCK

°

F

℃

°FH

℃

H

%RH

READ

LOG TIME UNIT ALARM

TERM

REP

INT REF

LOCK

°

F

℃

°FH

℃

H

%RH

READ

LOG TIME UNIT ALARM

TERM

REP

INT REF

LOCK

°

F

℃

°FH

℃

H

%RH

INST.No.INE-418-1P1CE

-14-

5.2.4 Retaining of hour

Select the “hour” by pressing ∧ key or ∨ key .
By pressing ENT key, the hour selected will be retained
and “minute” will flash.

5.2.5 Retaining of minute

Select the “minute” by pressing ∧ key or ∨ key.
By pressing ENT key, the minute selected will be
retained and “year” will flash.

5.2.6 Retaining of y ear

Select the “year” by pressing ∧ key or ∨ key . (The year up to 2099 can be se lected.)
Press ENT key to retain the year se lected.

5.2.7 Storing of clock

The flashing of the year selected will stop and the clock programmed will be stored.

5. Measurement preparation

READ

LOG TIME UNIT ALARM

TERM

REP

INT REF

LOCK

°

F

℃

°FH

℃

H

%RH

READ

LOG TIME UNIT ALARM

TERM

REP

INT REF

LOCK

°

F

℃

°FH

℃

H

%RH

 Judgment of clock

The judgment of the clock programmed is executed after pressing

ENT key in [5.2.7 Storing of clock]. If

the date not existed (Ex. February 31) has been programmed, the screen will return to [5.2.2 Retaining of
month] screen with “month” flashing. Reprogram the correct date.

This judgment function supports leap years.

Reference

INST.No.INE-418-1P1CE

-15-

[Programming range of clock]

Programming range Default

Month * 1 to 12 1

Day * 01 to 31 01

Hour 0 to 23 0

Minute 00 to 59 00

Year 2001 to 2099 2001

* Leap years are supported.

5. Measurement preparation

 Accurate clock programmin

g

For the accurate clock programming including second, take the following procedures.

1. Load the batteries at 0 second by referring to the radio time signal or an accurate watch.

2. Adjust the clock with the procedures from Para. 5.2.1 to Para. 5.2.7.
The counting of second starts at the moment the battery is loaded.

 The clock will be initialized when the batteries are replaced. Reprogram the clock.
 If the clock is reprogrammed, all time-related-param eters will be initialized. Reprogram the param eters.

For the programming by ∧ key, when the value reaches to the maximum value of the programming range,
it will not return to the default value even if ∧ key is pressed continuously .
Use ∨ key to decrease the value.

The time is based on 24-hour clock system. Program
14-hour for PM2 and 22-hour for PM10.
If

DISP key is pressed before the retaining of year, the

programmed data before it will not be stored.

Caution

Reference

Caution

Reference

INST.No.INE-418-1P1CE

-16-

5.3 Measurement unit selection

5.3.1 Measurement un it selection m ode

In the clock adjustment mode with “TIME” lit in the main marker, press

DISP

key several times to go to the measurement unit selection mode

(“UNIT” will light in the main marker.). In the measurement unit selection
mode, “

ºC” will flash.

5.3.2 T emper ature measurement unit

By pressing ∧ key or ∨ key, “ºC” or “ºF” will flash.
Press ENT key to retain the temperature measurement unit
selected. The te mpe ra tur e measurement unit selected will
stop flashing and the humidity measurement unit will flash.

5.3.3 Humidity measure ment unit

By pressing ∧ key or ∨ key, “ºC” or “%RH” will flash
when “ºC” is selected in [5.3.2 Selection of temperature
measurement unit], or

“ºF” or “%RH” will flash when “ºF”

is selected.
Press ENT key to retain the humidity measurement unit

selected. The humidity measurement unit selected will stop
flashing

5. Measurement preparation

READ

LOG TIME UNIT ALARM

TERM

REP

INT REF

LOCK

°

F

℃

°FH

℃

H

%RH

READ

LOG TIME UNIT ALARM

TERM

REP

INT REF

LOCK

°

F

℃

°FH

℃

H

%RH

INST.No.INE-418-1P1CE

-17-

Press

DISP key for about 2 seconds to go to the continuous measurement mode (Ref. [6. 1 Continuous measurement] for

starting the measurement.

Selection Default
T emperature unit ºC, ºF

ºC

Humidity unit

%RH (Relative humidity)
ºC, ºF (Dew-point temperature)

%RH

5. Measurement preparation

When the measurement unit is changed, the parameters of high alarm, low al arm and totalizing reference
temperature will be initialized.
When

“°C” is selected for the temperature measurement unit, the humidity measurement unit is selected

from

“%RH” or “ºC”. When “ºF” is selected, it is selected from “%RH” or “ºF”. In condition that “ºC” is for

the temperature measurement unit and the humidity measurement unit, when

“ºF” is selected for the

temperature measurement unit, the humidity measurem ent unit becom es

“ºF” forcibly .

Reference

INST.No.INE-418-1P1CE

-18-

6.1 Continuous measurement mode

By pressing

DISP key, the temperature/humidity measurement will start after bars are displayed for about 1 second.

The measured temperature will be displayed in the main display 1 and the measured humidity will be displayed in the main
display 2 together with the display of month, day , hour, and minute at the measurement.
The temperature measurement unit and the humidity measurement unit being displayed are the units already selected.
For the selection of the measurement unit, refer to [5.3 Measurement unit selection].
If

“ALARM” lights in the main marker, th e measurement value has exceeded a high alarm setpoint or a low alarm setpoint.

Check the setpoints and reprogram them if necessary. Refer to [4.2 High alarm setpoint] and [4.3 Low alarm setpoint] in
the separate instruction manual Vol. 2 <Function instructions>.

6. Continuous measurement

If “Er4” for “low battery” or “meter abnormal” is displayed in the main display 2, replace the batteries
first. (Ref. [5.1 Loading of batteries] in the separated instruction manual Vol. 1 <Basic instructions>)

If

“Er4” is still displayed by the above re placem ent of batt eries, c ontact your CHINO’s agent.

READ

LOG TIME UNIT A LARM

TERM

REP

INT REF

LOCK

°

F

℃

°FH

℃

H

%RH

READ

LOG TIME UNIT ALARM

TERM

REP

INT REF

LOCK

°

F

℃

°FH

℃

H

%RH

Bar

Main marke

r

Humidity

measurement

T emperature
measurement unit

Main display 1:
T emperature

Main display 2:
Humidity

Month Day Hour Minute

Caution

INST.No.INE-418-1P1CE

-19-

6.2 Measured temperature/humidity d isplay range

ººC

-40 to 80ºC Temperature

ºF

-40 to 176ºF

%RH

0 to 100%R H

ºC

-60 to 80ºC

Humidity

ºF

-76 to 176ºF

When the clock is displayed after the measurement for about 1 minute, the auto-power- off function is “on” (active).
For continuing the continuous measurement, sele ct the auto-power-off function to

“oFF” (releas e). (R ef . [A uto -po we r-off fu nc ti on ] i n

Important notices)

When the auto-pow er-off function is set at “oFF” ( rele ase) an d the continuous me asur em ent is e x ecuted ,
the batteries wil l be consumed very rapidly .
For t he continuous me asurement const antly executed, use the AC power adapter (RH32-AC110) sold
separately.

6. Measurement and da ta st orage

When the measured temperature is lower than the minimum limit, “uFL” will be displayed in the main
display 1 and, when it is higher than the maximum limi t,

“oFL” wi ll be disp lay ed.

When the measured humidity is 0%, 0% will be displayed, but when the measured humidity is higher than
100%

(

dew condensation), the value will be held at 100%.

Reference

Caution

INST.No.INE-418-1P1CE

-20-

The followin g procedure is for the replaceme nt of the temper ature/h umidity sensor being used for lon g period with a new one or
the rep lace me nt of th e bui lt- in ty pe tem pera ture /h um idity sen sor w ith the separ a ted ty pe se nsor o r the pr obe typ e sensor.

1) Pull o ut the tempe rat ure /h umid ity senso r from thi s meter.

7. Replacement of te mperature/humidity sensor (Ref. [3.1 O ver vie ws and func tio ns

])

Make s ure to p ull out th e temper ature/humidi ty sensor straight b y holding its front and rear f aces by tw o
fingers. Pins may be bended if it is not pulled out straight.
For discon nectin g the sepa rated ty pe senso r or the probe ty pe sensor fr om this meter, pull out it by hold ing the
connection part. Make sure not to pull out the cable. (Ref. [1 1. External dimensions])

<Built- in type RH32B>

<Separated type RH32S>

<Probe type RH32P>

Connection par t
Hold here.

Cable (*)

Pu ll out s tra ight.

Pu ll out s tra ight.

(*) Do

n

’t pull out the cable.

Caution

INST.No.INE-418-1P1CE

-21-

2) Ali gn th e prot rusi ons a t bo th si des o f t he conn e ct ion p art o f th e tempera­ture/humidity sensor (RH32S

-RP and RH 32 P- RP) or at both sides of the

built-in sensor (RH32B-RP) with the concave portions o f this meter, and
inser t the c onne ct ion pa rt or the bui lt- in sen so r stra igh t.

3) Align the pins of the connection part or the built-in sensor with the
connector of this me ter , an d push t he conn ect ion part or t he bu ilt-i n sens or
into this meter straight.

4) Press DISP key for about 2 seconds to go to the continuous measurement
mode. At this time, the temperature and humidity values displayed are
differen t from the exac t meas ured va lues.

If you squ eez e th e conne ction part or the built-in sensor into
this meter, the positions of the conn ector of this meter and
the pins of th e conn ection par t o r the built -in s enso r are not
fitted and the pins may be broken.

Concave portions
of meter

Protrusions o

f

built-in typ

e

sensor

<From top>

7. Replacement of te mperature/humidity sensor (Ref. [3.1 O ver vie ws and func tio ns

])

Caution

INST.No.INE-418-1P1CE

-22-

5) In the continuous measurement mode, press ∨ key while press ing ∧ (SHIFT) key.

After bars are disp layed for about 1 second, th e correct tem perature and humidity measured value s will be display ed.

7. Replacement of te mperature/humidity sensor (Ref. [3.1 O ver vie ws and func tio ns

])

READLOG TIME UNIT ALARM

TERM

REP

INT RE F

LOCK

°

F

℃

°FH

℃

H

%RH

READLOG TIME UNIT ALARM

TERM

REP

INT RE F

LOCK

°

F

℃

°FH

℃

H

%RH

Inter ch an ge ab ili ty of tem pe ra tur e/ hum id i ty sen sor s
The temperature/humidity sensors, the built-in type (

RH32B-RP), the separated type (RH32S - R P) and the

probe type (

RH32P - R P), are interchangeable.

The interchangeability will be obtained by pressing

∨ key whil e pressi ng ∧ (SHIFT) key in the proce-

dure No. 5)

Reference

INST.No.INE-418-1P1CE

-23-

A void to use this meter in the following places.

 Places where the ambient temperature is out of –10 to 50ºC (this meter)
 Places where the ambient temperature is out of –40 to 80ºC (separated type and probe type sensors)
 Places where dew condenses
 Places where vibration or impact affects
 Places where much noise exist
 Places where dusts exist
 Places where mu ch ketones organic solvent, esters organic solvent , halogen, strong acid material, corrosive material or

dust /oi l m is t/sa l t mi st ex i st

 Places where explosive gas, corrosive gas or flammable gas e xist
 Places where steam, chemicals or seawater splash

8. Working environment

As the humidity element is consta ntly exposed in ambient atmospher e, its performance may be remarkabl y
deteriorated depending on measuring environment.
Its life depends on the kind of environment. Particularly avoid using it in the following places as these places
make the humidity element life shorten rapidly .
 Place where k etones organic solvent, esters organic solvent, halogen, strong acid material, corrosive mate-

rial, dust /oi l mis t/sa lt mi st, cor ro sive gas, s team or seaw ate r sp la shin g exi st.

Caution

INST.No.INE-418-1P1CE

-24-

Phenomenon Content Countermeasure

1) “Er1” is displayed in the
main display 1.

Te mperature meas urement can’t be
executed.

Check the co nnection of the temper ature/hum i dity sensor.
(Ref. [7. Repl acemen t of t emper ature /humidity sen sor])
Check if dew has been condensed in the temperature/humidity
sensor.
Measurement is possible after recovering from dew condensation.

100%R H has been measu r ed in the
humidity measur ement.

Check the co nnection of the temper ature/hum i dity sensor.
(Ref. [7. Repl acemen t of t emper ature /humidity sen sor])

2) The humidity value in the

main display 2 is 100%RH
(The de w-point temperat ure
display becomes the same
value as th e tempe ratur e
measured value.).

Interchangeability of the tempera­ture/humidity sensor has not been
obt ained.

Press ∨ key while pressing ∧ key .
(Ref. [7. Repl acemen t of t emper ature /humidity sen sor])

The humidi ty meas uremen t from 0 %RH is possible.
Check if an obj ect is not in absol ute dry c onditio n.

0%RH has been measured in the
humidity measur ement.

Check the co nnection of the temper ature/hum i dity sensor.
(Ref. [7. Repl acemen t of t emper ature /humidity sen sor])

3) The humidity value in the

main display 2 is 0%RH
(The dew-point temperature
display becomes -60ºC .).

Interchangeability of the tempera­ture/humidity se nsor has not bee n
obt ained.

Press ∨ key while pressing ∧ key.
(Ref. [7. Repl acemen t of t emper ature /humidity sen sor])

4) “Er1” is displayed in the
main display 2.

Humidity measurement can’t be
executed.

Check the co nnection of the temper ature/hum i dity sensor.
(Ref. [7. Repl acemen t of t emper ature /humidity sen sor])

5) “Er2” is displayed in the

main display 2.

In the dew-point temperature dis­pla y, the dew-p oint c omputat ion is
not possible due to abnormal
temperature data.

If “Er1” is displayed in the main display 1, check the connection of
the temperature/humidity sensor .
(Ref. [7. Repl acemen t of t emper ature /humidity sen sor])

9. Troubleshooting

INST.No.INE-418-1P1CE

-25-

Phenomenon Content Countermeasure

6) “Er4” is displayed in the
main display. 2

The batterie s are d ead.
If “Er4” is still disp la yed a fter th e
battery replacement, this meter has
been a bn o r m al .

Replace the ba tteries w i th new on es. (R ef. [5.1 Lo ading of b atterie s])
If “Er4” is still displayed after the battery replacement, contact your
OMEG A’s agent.

7) Nothing inc luding the clock

is displayed.

No power has been supplied.

Replace the ba tteries w ith n ew ones.
(Ref. [5.1 Loa ding of ba tteri es])

8) None displ ayed The batteries are dead

Replace the ba tteries w ith n ew ones.
(Ref. [5.1 Loading of batteries] )

9) “oFL” is displayed in the

main dis pl ay 1 .

T em per at ure m eas ured value
overf lowed

Check the tem pera ture m easu ring rang e.
Check the co nnectio n of th e temper atur e/humi dity se nsor .
(Ref. [7. Repl acemen t of t emper ature /humidity sen sor])

10) “uFL” is displayed in the

main display 1.

Te mperature measured value under
flowed

Check the tem pera ture m easu ring rang e.
Check the co nnectio n of th e temper atur e/humi dity se nsor .
(Ref. [7. Repl acemen t of t emper ature /humidity sen sor])

9. T ro uble sho oting

INST.No.INE-418-1P1CE

-26-

Sensor High-polymer capacitance type
Mea s uring range 0 to 1 0 0%RH
Accuracy ra tings ±2%RH (0 to 9 0%RH，at 25ºC), ±3%RH (90 to 95%RH, at 25ºC)
Stability (under EM C test envir onment) ±3%RH
Temperature coefficient ±0.1%RH/ºC (5 to 80ºC)

Relative
humid ity

Response time Shorter than 15 seconds (90% respons e, 2 5ºC const ant , u n de r 0. 1m/ s v e nt i l a tion)
Sens or S emi - c on duc t or type tem pe r at ure s ensor
Mea s uring range -10 to 50ºC, -40 to 80ºC (Probe ty pe RH3 2 P, separa ted type RH32S)
Accuracy ratings ±0.5ºC (0 to 50ºC), ±1ºC (other than the left shown)

Temperature

Stability (under E MC tes t environ ment) ±0.5%RH

Sensor interchangeability

Plug-in type intercha ngea bility (Plug-in ty pe in terchange ability incl uding 1.5m cable f or probe ty pe an d separate d type sens or)

Power supply

2 A A ( UM-3) alk al ine batt er ies or 10 0VAC (AC po we r ada pte r – s old sepa r ate ly )

Current data

Year, mo nth, day, hour, minut e, te m p er at ure m e asured val ue (ºC or ºF),
Relative humidity or de w-point te mperature me asure d value (ºC or ºF)

Data reading

Programmed par ameters, stored data with y e ar, mont h, day, hour, and minut e (The ye a r data is av ailable in u s i ng the data
logging software package (sold separately) .
Max. temp./humidity, min. temp./humidity , aver age temp./humidity, totalized temperature

Parameter item

Clock: Year, m ont h, d ay, hour , minute , Temperat ure: ºC, ºF
Relative humidity, dew-point temperature (ºC or ºF)
Stora g e m ode : Manual [ by pr es s i ng o f ENT (L OG) key for more than 2 seconds] or automatic
Stora ge start ti m e: Year, mo nt h, day, h our, min ute , or by pressi ng of ENT ( L OG) k ey w hi le pr es sing ∧ (SHIFT) key
Stora g e s to p ti me : Year , mon th, day, hour, m i nut e or by pre ss ing of ENT (L O G) k ey while pr e ss ing ∧ (SHIFT) key
Storage repetition: Disable, every day , every week
Meas ure ment int er val : cont in u ous, 1 to 60 min utes
High/low alarms, t otalizing re ference temperat ure, totalizi ng direct ion, au to- power- off , key lock

Display

Display content

Clock – dis play e d co nsta nt ly
Meas ur e d va lu e s – di splayed by pressi ng DISP key for ab out 2 seconds i n power- off condition

Number of stored data Temperature/humidity – each maximum 8000 data, total 16000 data EEPROM）
Communicati ons f u nc ti o n RS-232C or R S- 4 85

10. Specifications

INST.No.INE-418-1P1CE

-27-

11.1 External dimensions of RH32B-C

11 . External d imensio ns

64

Tem

p

erature / humidity senso

r

Displa y

Function
key

Cover for AC powe

r

adapter jack

Hole for strap

Comm un icati on s jac

k

Hole for wall
installation

Battery cover

Holes f or de sk top a ttac hme nt

30

2

3

110

unit : mm

INST.No.INE-418-1P1CE

-28-

11.2 External dimensions of RH32P-C 11.3 External dimensions of RH32S-C

1 1. Ex ternal dimensi ons

Tem perature
/ humid i ty sens or

φ18

110 30

158

φ12

40

Cabl e le ngt h: 1.5 m

Cable length: 1.5m

unit : mm

Tem perature
/ humid i ty sen s or