Extech Instruments RH35 User manual



 USERGUIDE

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Hygro‐ThermometerAlert

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ModelRH35

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EXTECHINSTRUMENTS

2RH35‐en‐EU_v1.17/14

Introduction

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Thankyouforselecting the ExtechInstrumentsModel RH35. Thisdeviceisshippedfullytested

and calibrated and, with proper use, will provide years of reliable service. Please visit our

website(www.extech.com)tocheckforthelatestversionofthisUserGuide,ProductUpdates,

andCustomerSupport.

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Safety

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InternationalSafetySymbols

Thissymbol,adjacenttoanothersymbolorterminal,indicatestheusermustrefertothemanualfor

furtherinformation.



Doubleinsulation

SafetyNotes

o Removethebatteryifthedeviceistobestoredforlonge rthan60days.

o Neverdisposeofbatteriesinafire.Batteriesmayexplodeorleak.

o Nevermixbatterytypes.Alwaysinstallnewbatteriesofthesametype.

Cautions

o If the equipment is used in a manner not specified by the manufacturer, the protection

providedbytheequipmentmaybeimpaired.

o Batteriescancontainharmfulacids.Lowbatteriesshouldbechangedassoonaspossibleto

preventdamagecausedbyleaking.

o Neveruseacombinationofold

andnewbatteriestogether,orbatteriesofdifferenttypes.

o Wearchemical‐resistantprotectiveglovesandglasseswhenhandlingleakingbatteries.

o Donotplaceyourproductnearextremetemperatures,vibrations,orshocks.

o Protectdevicefrommoisture.

EXTECHINSTRUMENTS

3RH35‐en‐EU_v1.17/14

MeterDescription

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MeterFront

1. 24‐hourmoldradaranimation

2. Indoortemperature(°C/°F)andMIN‐

MAX/Dewpointtemperature

3. FacialIconsforcomfortlevelstatus

4. MIN‐MAXButton

5. DewPointButton

6. RelativeHumidity%display

7. WarningLEDwhenriskofmold

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MeterBack

1. Wallmount

2. Batterycompartment

3. Batterycompartmentlatch

4. AlarmSoundON/OFFswitch(SpeakerSymbol)

5. RadarAnimationON/OFFswitch(Arrow

Symbol)

6. Supportstand(removestandtoaccessAlarm

soundandRadaranimationswitches)

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EXTECHINSTRUMENTS

4RH35‐en‐EU_v1.17/14

Operation

GettingStarted

 Removetheprotectivefoilfromthedisplay.

 Openthebatterycompartmentandremovethebatteryinsulationstrip.Thedevicewill

soundthealarmandallLCDsegmentswillbedisplayedfortwosecondsasthedevice

switchesON.

 Theindoortemperature,relativehumidity,andcorrespondingfacialsymbolwill

appear

onthedisplay.Thisindicatesthatthemeterisnowreadyforuse.

Note:DonotattachthesupportstanduntiltheswitchesfortheRadarAnimationandAlarm

Soundaresetasdesired.Thesetwoswitchesareconcealedbythesupportstandwhenitis

attached.Referto

theDescriptionsectionofthisguideforthelocationoftheswitchesand

refertothededicatedsectionsbelowformoredetail.

24HourMoldRadarDisplay

The device measures the relative humidity % every 30 seconds and calculates the average

valueevery10minutes.Theinnovativemoldradardisplaygraphicallydepictstheaverageon

a24‐hourtime‐line.

Thetime “0 h”  representsthe valuefor the current hour. “‐1” represents the last hour, “‐3”

forthepast2‐3hours,“‐6”forthepast4‐6hours,“‐12”forthepast7‐12hours,and“‐24”for

thepast13‐24hours.

Therelativehumidityvaluesareshownongridlinesfrom15to85%.

Areadinghigherthan65%

RHindicatesapotentialformold.

RadarAnimationON/OFFSwitch

Removethesupportstandtoaccessthe RadarAnimationON/OFF switch on the back of the

unit(theswitch is on the  rightidentifiedbythearrowicons).Slidetheswitch UP to activate

theRadarAnimation.SlidetheswitchDOWNtodeactivatetheRadarAnimation.

AlarmSoundON/OFFSwitch

RemovethesupportstandtoaccesstheAlarmSoundON/OFFswitchonthebackoftheunit

(the switch is on the left identified by the audio icons). Slide the switch UP to activate the

AlarmSoundbeeper.SlidetheswitchDOWNtode‐activatetheAlarmSoundbeeper.

If the relative humidity measurement is higher than 65%, the alarm beeper sounds for one

minute and the red warning light (front panel, right) flashes. Press any button to stop the

alarm sound. The warning light continues flashing until the measured humidity falls below

65%.

ComfortLevel

The device displays one of two facial indicators representing the comfort levelof the indoor

climate. A smiling face indicates an ideal relative humidity range (40‐60%). A frowning face

indicatesanoverlywetordrycondition(<40%or>60%).

EXTECHINSTRUMENTS

5RH35‐en‐EU_v1.17/14

DewPointTemperatureDisplay

PresstheDewPointbuttontodisplaythe DewPointTemperaturefor5seconds.Thedisplay

willreverttotheAirTemperature/RelativeHumiditydisplaymodeafter5seconds,

automatically.

TemperatureUnitsSelection

PressandholdtheDewPointbuttonfor5secondstotogglethetemperatureunits(°Cand°F).

Note: In MIN/MAX mode pressing and holding the Dew Point button clears the MIN or MAX

memory (depending on which one is selected) and does not change the temperature units.

EnsurethatMIN/MAXmodeisnotactivatedwhenchangingthetemperatureunits.

MinimumandMaximumValues

 PresstheMIN/MAXbuttonandtheMAXiconwillappearalongwiththehighestindoor

temperatureandhumidityreadingscapturedsincethelastreset.

 TodisplaytheMINvalues,presstheMIN/MAXbuttonagain.TheMINiconwillappear

alongwiththelowestindoortemperatureandhumidityreadingscapturedsincethelast

reset.

 TheinstrumentwillautomaticallyexittheMIN/MAXmodeifnobuttonispressed.

 Toexittothenormaldisplaymodemanually,presstheMIN/MAXbuttonagain(theMIN

andMAXindicatorswillswitchOFF).

 TocleartheMINorMAXmemory,pressand

holdtheDewPointbuttonforthree

secondswhiletheMINorMAXiconisshowing. TheMINortheMAXindicatorwillflash

asitsmemoryiscleared.

TableTopandWallmountingConsiderations

The unit can be wall mounted using the wall mount access hole located on the rear of the

device.Usethesupportstandfortabletopuse.Notethatthehumiditylevelcanvarygreatly

accordingtolocation;mountthe unitasclosetotheareaofconcernaspossible.

EXTECHINSTRUMENTS

6RH35‐en‐EU_v1.17/14

Maintenance

Cleaning

Cleantheinstrumentwithasoftdampcloth.Donotusesolventsorabrasives.

Batteryreplacement

Removethebatteriesiftheproductisnottobeusedforlongperiods.Changethebatteries

whenthebatterysymbolappearsemptyonthedisplay.Opentherearbatterycompartmentand

inserttwonewbatteries1.5VAAAobservingcorrectpolarity.Closethebatterycompartment

beforeuse.



BatterySafetyReminders

o Pleasedisposeofbatteriesresponsibly;observelocal,state,andnationalregulations.

o Neverdisposeofbatteriesinafire;batteriesmayexplodeorleak.

o Nevermixbatterytypes;installnewbatteriesofthesametype.

o 

Neverdisposeofusedbatteriesorrechargeablebatteriesin

householdwaste.

As consumers, users are legally required to take used batteries to appropriate

collection sites, the retail store where the batteries were purchased, or wherever

batteriesaresold.

Disposal: Do not dispose of this instrument in household waste. The user is obligated to take

end‐of‐life devices to a

 designated collection point for the disposal of electrical and electronic

equipment.

Specifications

TemperatureRange‐10°Cto60°C(14°Fto140°F)

TemperatureAccuracy ±1°C(±1.8°F)from0to50°C(32to122°F),otherwise±1.5°C(2.7°F)

RelativeHumidityRange 10to99%

RHAccuracy ±4%from30%to80RH%,otherwise±5%

Batteries Batteries2x1.5VAAA

Dimensions 98x23[50]x98mm

(3.86x0.91[2.04]x3.86in.)

Weight  87g(3.1oz.)



Allrightsreservedincludingtherightofreproductioninwholeorinpartinanyform

www.extech.com



Extech Instruments RH35 User manual

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