Extech Instruments RH35 User manual

Brand: Extech Instruments

Model: RH35

Category: Measuring, testing & control

Type: User manual

Extech Instruments RH35 is a portable, battery-powered device designed to accurately measure relative humidity and temperature. It features a 24-hour mold radar display, comfort level indicator, dew point temperature display, and minimum and maximum value memory.

The mold radar display provides a graphical representation of the average relative humidity over the past 24 hours, helping you identify potential mold growth areas. The comfort level indicator uses a smiling or frowning face to indicate if the indoor climate is ideal (40-60% relative humidity) or too wet or dry.

The dew point temperature display shows the temperature at which water vapor in the air condenses, which can be useful for understanding how close the air is to becoming saturated and forming condensation. The minimum and maximum value memory allows you to track the highest and lowest temperature and humidity readings over time.



 USERGUIDE



Hygro‐ThermometerAlert



ModelRH35



EXTECHINSTRUMENTS

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

Introduction



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.



Safety



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



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



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)



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

Brand: Extech Instruments

Model: RH35

Category: Measuring, testing & control

Type: User manual

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Extech Instruments RH35 User manual

Extech Instruments RH35 User manual

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