Extech Instruments RH25 Manuel utilisateur

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USERGUIDE

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HeatIndexPsychrometer

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ModelRH25

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2RH25‐EU‐ENv1.05/13

Introduction

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ThankyouforselectingtheExtechInstrumentsModelRH25HeatIndexPsychrometer.TheRH25

measuresTemperatureandRelativeHumidity(usingprecisioncapacitanceRHsensor).TheRH25

alsocalculatesanddisplaysHeatIndex,DewPoint,WetBulb,andWetBulbGlobetemperatures.

TheHighTemperatureAlarmfeaturealertstheuserwhenHeatIndexorWetBulbGlobelevels

exceeduser‐presetlimits.

DataHoldandMIN/MAX/AVGmemoryutilitiesmakeiteasiertorecallimportantdata.

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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Description

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Meter

1. Sensorarea

2. Displayarea(LCD)

3. POWERbutton

4. HOLDbutton

5. MODEbutton

6. Batterycompartmentonrearofinstrument

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Display

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TEMP Temperature

AIRTAirTemperature

RHRelativeHumidity

HIHeatIndex

DPDewPointtemperature

WBWetBulbtemperature

WB/HIWetBulbGlobetemperature

MAXMaximumreadingmemory

MINMinimumreadingmemory

AVGAveragereadingmemory

HOLDDataHold(freezesdisplay)

BATLowBatterysymbol

%PercentunitsforRHreadings

oDegreessymbolfortemperatureunits

EUsedtodisplaytemperatureunitsCorF

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3RH25‐EU‐ENv1.05/13

Operation

Keypad

POWER:SwitchthemeterONorOFF;alsousedtoentertheMAX/MIN/AVGmemorymode.

HOLD:PresstoenterDataHold(readingfreezesondisplay).PressagaintoexitDataHold.

MODE:Presstostepthroughthemeasurementmodes:TEMP(Temperature),RH(Relative

Humidity),HI(HeatIndex),DP(DewPoint),(WB(WetBulb),andHI/WB(WetBulbGlobe).

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Poweringthemeter

PressPOWERtoswitchmeterON.Themetershowsalldisplayiconsmomentarilyasitswitches

ONandthentheTEMPiconandthetemperaturereadingwilldisplay.Themeterwillalsoemita

chirpsoundasitswitchesON.

ToswitchthemeterOFF,pressandholdthePOWERbuttonforatleast2seconds.

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MAX/MIN/AVGMemory

WiththemeterpoweredON,pressPOWERbuttonmomentarily.TheMAXiconwillappearand

themeterwilldisplayonlythehighestreading.

PressPOWERagain;theMINiconwillappearandthemeterwillonlydisplaythelowestreading.

PressPOWERagain;theAVGiconwillappearandmeterwillonlydisplaytheaveragereading.

PressPOWERagaintoexit(theMAX/MIN/AVGiconswillswitchOFF).

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DataHold

WiththemeterpoweredON,presstheHOLDbuttonmomentarily.TheHOLDiconwillappear

andthecurrentreadingwillfreezeonthedisplay.PressHOLDagaintoexit(theHOLDiconwill

switchOFF).

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AutomaticPowerOFF(Sleep)Mode

ThemeterswitchesOFFautomaticallyafter15minutesofinactivity.Todefeatthisfeature

temporarily:WiththemeterswitchedOFF,presstheHOLDandPOWERbuttonssimultaneously

untilthemeterdisplaysthescreenshownbelow.Now,theusermustswitchthemeterOFF

manuallybypressingandholdingthePOWERbuttonforatleast2seconds.Notethatthenext

timethemeter’spoweriscycled,theAutoPowerOFFutilitywillagainbeactive.

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4RH25‐EU‐ENv1.05/13

SelectingoC/oFunitsofmeasure

WiththemeterOFF,pressandholdthePOWERandMODEbuttonssimultaneouslyuntiltheunit

ofmeasureappearsonthelowerrightcorneroftheLCD.UsetheMODEbuttontoselectthe

desiredunitofmeasure(oCoroF).PressPOWERtwicetosteppastthealarmsettingsuntilthe

normalmeasurementmodeisdisplayed.

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HighAlarmforHeatIndexandWetBulbGlobetemperature

1. WiththemeterOFF,pressandholdthePOWERandMODEbuttonssimultaneouslyuntilthe

temperatureunit‘C’or‘F’appearsonthelowerrightcorneroftheLCD(ifdesired,usethe

MODEbuttontoselectthedesiredunitofmeasure).

2. PressthePOWERbuttontosteptotheHeatIndex(HI)AlarmON/OFFdisplay.

3. UsetheMODEbuttontoselectON(A‐on)orOFF(A‐oF);seedisplayexamplesbelow:

4. PressPOWERtosteptotheHeatIndextemperatureAlarmlimitvalue.Seeexamplebelow:

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5. PresstheMODEbuttonmomentarilytochangethevalueinsmallsteps.Pressandholdthe

MODEbuttontoscrollquickly.

6. WhenthedesiredHeatTemperaturealarmlimitisdisplayed,pressthePOWERbuttonto

continuetotheWetBulbGlobetemperatureAlarmprogrammingscreens.

7. Repeatsteps3‐6toprogramtheWetBulbGlobetemperatureON/OFFandAlarmlimits.

UsethePOWERbuttonwhendonetostepbacktothenormaloperatingmode.

8. Thedefaultsettingsare27.8oC(82.0oF)forHeatIndextemperaturealarmlimitsand28.0oC

(82.4oF)forWetBulbGlobetemperaturealarmlimits

9. Wheneitheralarmlimitisexceeded,themetercontinuouslybeeps.Todeterminewhich

alarmissounding,checktheHI(HeatIndex)andWB/HI(WetBulbGlobe)temperature

displaystoseewhichunitofmeasureisblinking,thatwillindicatethetrippedalarm.

10. TosilenceanalarmtheusermusteitherswitchthealarmOFForchangeitsalarmlimitvalue.

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ErrorMessageDisplays

E‐2:HumiditySensorfailure.Replaceunit.

E‐3:TemperatureSensorfailure.Replaceunit.

E‐4:Temperatureover‐range;E‐5:Temperatureunder‐range

E‐6:Hardwarefailure.Replaceunit

5RH25‐EU‐ENv1.05/13

Appendices

AppendixA–HeatIndexbasedonTemperature(oF)vs.RelativeHumidity(%)

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Note:ItalicvaluesareHeatIndexbasedontheTemperature(leftcolumn)andRelativeHumidity(toprow).

oF90%80%70%60%50%40%

80oF858482818079

85oF1019692908684

90oF121113105999490

95oF13312211310598

100oF142129118109

105oF148133121

110oF135

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AppendixB–HeatIndexbasedonTemperature(oF)vs.DewPoint(DP)

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Note:ItalicvaluesareHeatIndexbasedontheTemperature(leftcolumn)andDewPoint(toprow).

oF55DP60DP65DP70DP75DP80DP85DP

80oF556065838487

85oF808081899399107

90oF848695100107117

95oF91101106114125

100oF113121131

105oF127138

110oF134145

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AppendixC–HeatIndexandHealthEffects

HeatIndexof80to90oF:Fatiguepossiblewithprolongedexposureandphysicalactivity

HeatIndexof90to105oF:Sunstroke,heatcramps,andheatexhaustionpossible

HeatIndexof105to130oF:Sunstroke,heatcramps,heatexhaustionlikely;heatstrokepossible

HeatIndexof130oForgreater:Heatstrokehighlylikelywithcontinuedexposure

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TheHeatIndexisdeterminedusingthedrybulbtemperatureandtherelativehumidity.Itis

basedonchartsavailablethroughtheU.S.NationalWeatherService.TheHeatIndexrepresents

howanaveragepersonfeelsrelativetoclimateconditions.Foragiventemperature,thehigher

thehumidity,thehighertheheatindexwillbe.

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6RH25‐EU‐ENv1.05/13

BatteryReplacement

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Whenthelowbatteryicon(BAT)appearsontheLCD,theCR‐2032lithiumbuttonbatterymust

bereplaced.Thebatterycompartmentislocatedontherearofthemeter.

1. Useacointoturnthebatterycompartmentcovercounter‐clockwisetoopen.

2. Notetheposition,orientation,andpolarityoftheexistingbatteryinstallation.

3. ReplacetheCR‐2032Lithiumbatteryfollowingthesameposition,orientation,and

polarity.

4. Replacethebatterycompartmentcoverandsecureitusingacointoturnitclockwise

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.

OtherBatterySafetyReminders

oNeverdisposeofbatteriesinafire.Batteriesmayexplodeorleak.

oNevermixbatterytypes.Alwaysinstallnewbatteriesofthesametype.

Specifications

Display  Multi‐functionLCD

Measurementranges

AirTemperature‐20to50oC(‐4to122oF)

HeatIndex  ‐46to205oC(‐50.8to401oF)

DewPoint ‐78to50oC(‐108.4to122oF)

WetBulb ‐20to50oC(‐4to122oF)

WetBulbGlobe‐25to54.5oC(‐13to130oF)

RelativeHumidity0to99.9%RH

Resolution 0.1oC/oF/%RH

Accuracy

Temperature ±0.6oC(1oF)

RelativeHumidity±3%RH@25oCfrom10to90%RHotherwise±5%RH

Powersupply 1xCR2032LithiumBattery

Dimensions 140x35x18mm(5.5x1.4x0.7")

Weight  50g(1.8oz.)

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

www.extech.com

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Extech Instruments

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Extech Instruments

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Extech Instruments

Extech Instruments SDL720 Manuel utilisateur

Extech Instruments

Extech Instruments VB450 Manuel utilisateur

Extech Instruments

Extech Instruments 407736 Manuel utilisateur

Extech Instruments

Extech Instruments 380973 Manuel utilisateur

Extech Instruments

Extech Instruments MA3110 Manuel utilisateur

Extech Instruments

Extech Instruments 407790A Manuel utilisateur

Extech Instruments

Extech Instruments 461891 Manuel utilisateur

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Extech Instruments 381295 Manuel utilisateur

Extech Instruments

Extech Instruments PQ3450-30 Manuel utilisateur

Extech Instruments

Extech Instruments RH350 Manuel utilisateur

Extech Instruments

Extech Instruments HD450-NIST Manuel utilisateur

Extech Instruments

Extech Instruments 461825 Manuel utilisateur

Extech Instruments

Extech Instruments RF20 Manuel utilisateur

Extech Instruments

Extech Instruments MA640 Manuel utilisateur

Extech Instruments

Extech Instruments 42265 Manuel utilisateur

Extech Instruments

Extech Instruments FHT200 Manuel utilisateur

Extech Instruments

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Extech Instruments

Extech Instruments SL510 Manuel utilisateur

Manuels Instrument de mesure populaires d'autres marques

Suaoki

Suaoki D40 Manuel utilisateur

Elster

Elster BK-G1.6 Manuel utilisateur

Endress+Hauser

Endress+Hauser Deltabar FMD71 Manuel

Duratool

Duratool D03128 Manuel utilisateur

Vega

Vega VEGAPULS 65 Manuel utilisateur

Tonghui

Tonghui TH2618B Manuel utilisateur

Tenmars

Tenmars TM-801 Manuel utilisateur

MSR

MSR 145 Manuel utilisateur

TPS

TPS WP-82 Manuel utilisateur

ELMETRON

ELMETRON CP-511 Manuel utilisateur

PCB Piezotronics

PCB Piezotronics 003C30 Manuel utilisateur

Tenma

Tenma 72-10465 Manuel utilisateur

Endress+Hauser

Endress+Hauser Proline Promag 50 Caractéristiques techniques

Siemens

Siemens SITRANS F Coriolis FCT030 Manuel de la liste des pièces

KLINGER

KLINGER CMF V Series Manuel utilisateur

EXFO

EXFO FTB-2 Manuel d'exploitation et d'entretien

Keysight

Keysight M8290A Manuel utilisateur

ADTEK

ADTEK MW-5 Manuel utilisateur