Extech Instruments RH30 Manuel utilisateur

USERGUIDE



HumidityAlert

PortableHygro‐Thermometer

withDewPoint



ModelRH30

Introduction

ThankyouforselectingtheExtechModelRH30.TheRH30monitorsrelativehumidity,air

temperature,dewpointtemperature,andMAX‐MINreadings.TheRH30alsoincludesan

audible/visualhighhumidityalarm.Thisdeviceisshippedfullytestedandcalibratedand,with

properuse,willprovideyearsofreliableservice.PleasevisittheExtechInstrumentswebsite

(www.extech.com)tocheckforthelatestversionofthisUserGuide.ExtechInstrumentsisanISO‐

9001certifiedcompany.

Safety

GeneralSafety

oPleasereadallsafetyandinstructionalinformationbeforeusingthisproduct.

oThisproductisintendedforhomeuseonly.

oUnauthorizedrepairs,modifications,orotherchangestotheproductarenotsupported.

oThisproductisnotintendedforuseinmedicalpractices.



Caution!RiskofInjury!



oKeepthisproductanditsbatteriesoutofthereachofchildrenandpets.

oBatteriesmustnotbeplacedinfire,shortcircuited,takenapart,ordischarged.Riskof

explosion!

oBatteriescanbefatalifswallowed.Contactmedicalemergencypersonnelifbatteriesare

swallowed.

oBatteriescontainharmfulacids.Weakbatteriesshouldbechangedassoonaspossibleto

preventdamagecausedbyleakingbatteries.



ProductSafety!



oDonotplacethisproductnearextremetemperatures,vibration,orshock

oNeverholdaprobedirectlyinoroverfire

oDonotimmersethemetersinanyliquid

2RH30‐EN‐EUv1.411/13

AL. ON

AL. OFF

65%

55%

60%

Description

MeterDescription

1. RelativeHumidityreading

2. AirTemperaturereading

3. DewPointreading(Td)

4. HumidityAlarmindicator

5. Batterycompartment

6. Resetbutton

7. MIN‐MAXbutton

8. Meterstand

9. AlarmON/OFFswitch(rear)

10. TemperatureUnitsswitch(rear)

11. RHAlarmsettingswitch(rear)

12. Wallmountaccesshole(rear)



TemperatureandHumiditychart(Forgeneralreferenceonly)



Operation

DisplayProtectiveFoil

TheLCDdisplaymayincludeaprotectivefoilcovering.Carefullyremovethisfilmbeforeuse.

Poweringthemeter

Openthebatterycompartmentbyslidingthefrontbatterycompartmentcoverdownward.Ifthe

meterisnewandbatteriesareinstalled,thebatteryinsulationstripmustberemovedbefore

usesothatthebatteriescanmakepropercircuitcontactandpowerthemeter.Ifnobatteries

areinstalled,pleaseinserttwo1.5VAAbatteriesorientedforproperpolarity.

Theinstrumentshouldnowbepoweredupandrelativehumidity,temperature,anddewpoint

temperatureshouldbedisplayedlefttorightontheLCD.



EUconsumersarelegallyboundbytheBatteryOrdinancetoreturnusedbatteriesto

communitycollectionpointsorwhereverbatteries/accumulatorsaresold.Disposalin

householdtrashorrefuseisprohibited.

Disposal:Followthevalidlegalstipulationsinrespectofthedisposalofthedeviceat

theendofitslifecycle.

3RH30‐EN‐EUv1.411/13

Mounting

TheRH30canbewallmountedusingtherearwallmountaccessholeoritcanbeplacedona

desktoporothersurfaceusingthesuppliedstandbase.

SelectingoC/oFunitsofmeasure

Usetherear(center)oC/oFswitchtoselectthedesiredtemperatureunitofmeasure.

MAX‐MINandHOLDFunction

TheRH30storesthehighest(MAX)andlowest(MIN)readingssincethemeterwaslastreset.To

viewthemaximum(MAX)reading,presstheMIN‐MAXbutton(rightside,lower).Allreadings

displayedwillnowrepresentthehighestreadingsencounteredsincelastreset.TheMAX

indicatorwillalsoappearontheleftandmiddledisplaysforconfirmation.PresstheMIN‐MAX

buttonagaintoviewthelowestreadings(MIN)sincethelastreset.Allreadingsdisplayedwill

nowrepresentthelowestreadingsencounteredalongwiththeMINindicators.Toreset(clear)

theMAX‐MINmemories,pressRESET(rightside,upperbutton)whileMAXorMINisdisplayed.

RelativeHumidity(RH)Alert

TheRHAlarmtriggersanaudibletoneandtwovisualalerts(frowningfacesymbolilluminates

anduparrowappearsnexttothehumidityreadout)whentheRHexceedsthevaluesetbythe

user.Thelimitswitchontherear(right)ofthemetercanbesetto55%,60%,or65%RH.

WhentheRHreturnstothedesiredrangetheaudiblealarmwillstopsoundingandthefrowning

facesymbollightwillswitchoff.Thearrowwillremainhowevertoshowthatthehumiditywas

higherthanthesetvalueatleastonceinthepast.Toggletherearhumidity%limitswitchto

turnoffthearrow.

PracticalConsiderations

TheBasics

TheRH30thermo‐hygrometermonitorsambientroomconditionsandalertstheuserwhenthe

relativehumidityexceedstheuserprogrammedlimit(usetherearhumidity55/60/65%switch

tosetthelimit).

Excessivelyhumidroomaircanaffecthealth,promotingtheformationofmoistureandmold.At

theotherextreme,excessivelydryroomaircanalsoaffecthealthbydryingskin,mucous

membranes,andairways.Pets,houseplants,woodflooring,antiquefurniture,fineart,musical

instruments,etc.areallaffectedbyextremesinambientconditions.Effectiveheatingand

ventilationcanhelpachieveacomfortableandhealthylivingenvironmentandcanalsocut

costs.

TheBenefitsofVentilation

Forroomsthataretoohumid,ventilationatfirstmayseemabadideainwinterwhenoutdoor

airisalsocold,damp,andjustashumid.Coldairhowevercanabsorblittleornomoisture.

Whencoldairentersalivingareaitbecomeswarmerandcanthereforeabsorbmuchmore

watervapor;inonlyafewminutesthehumiditydecreases.

4RH30‐EN‐EUv1.411/13

DewPointTemperature

DewPointisawindowintotherelationshipbetweenTemperatureandHumidity.Forexample,if

airiscooledataconstant(absolute)humidity,therelativehumiditywillsteadilyincreasetoa

maximumof100%.Iftheairiscooledfurther,theexcesswatervaporwillseparateintheform

ofwaterdroplets.IftheRH30indicatesanairtemperatureof20oC(60oF)andarelativehumidity

of65%,thedew‐pointtemperaturewillbe13.2oC(56oF).Thismeansthatifwallsorceilingsina

livingareaarecoolerthan13.2oC(56oF),theairwillcondenseandformdropletsonthewalls

andceilingsurfaces.Moldanddamppatchescanresult.Inthissameexample,whentherelative

humidityoftheairis40%,thedewpointtemperatureisonly6oC(43oF).Surfaceswouldhaveto

besignificantlycolderfortheairtoreachitsdewpointtoformwaterdroplets.

TipsonAchievingOptimumAmbientConditions

oCheckthatthedewpointtemperatureofwallsisatleast15oC(59oF).

oDonotswitchoffhomeheatingcompletelywhenleavingthehouse.

oVentilateforshortperiodsonlyinallweatherconditions,evenduringrain.

oAirroomsbyopeningwindowsforashorttimeonly.Partiallyopenedwindowsforprolonged

periodsdonotyieldthedesiredresults,wasteenergy,andcanfurtherpromotethegrowthof

mold.

oIfroomairistoodry(asittendstobeinwinter),humidifierunitsarehighlyrecommended

sinceairingatlowoutdoortemperatureswilltendtodecreasehumidityfurther.



Specifications

Display Multi‐functionLCD

Sensor Swissprecisionhumiditysensorforquickandaccuratereadings

MeasurementrangeRelativeHumidity:1.0to99.0%RH

AirTemperatureandDewPointTemperature:‐10to50oC(14to122oF)

Resolution0.1oC(oF)and%

HumidityAccuracy±4%from35%to75%otherwise±5%

Temp.Accuracy±1.0oC(1.8oF)

Powersupply2x1.5VAAbatteries

Dimensions95x25x95mm(3.7x1.0x3.7")

Weight 90g(3.2oz.)instrumentonly,batteriesnotincludedinweightspec.



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

www.extech.com



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