Extech Instruments HT200 User manual

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USERMANUAL

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HeatStressWBGTMeter

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ModelHT200

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AdditionalUserManualTranslationsavailableatwww.extech.com

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EXTECHINSTRUMENTS

2HT200‐en‐GB_V1.411/16

Introduction

ThankyouforselectingtheExtechInstrumentsModelHT200HeatStressWBGTMeter.The

HT200accuratelydeterminestheHeatStressbyfactoringacombinationofparameters:

Humidity,Temperature,andDirectSolarRadiation.Thesefactorsaffecthowhighbody

temperaturesrise,aswellastheabilitytocooldown.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,Product

Registration,andCustomerSupport.

Features

Fastrespondingcapacitancesensor

Accuratemeasurementsfor:Wetbulbglobetemperature(WBGT),Blackglobetemperature

(TG),Humidity(%RH),Airtemperature(TA),Wetbulb(WET),andDewpoint(DEW)

Maximum,minimum,anddataholdRecording

Lowbatteryindication

LCDdisplaywithLEDbacklighting

Manualdatarecording(upto50readingsets)

Viewdatarecords

SelectabletemperatureunitsCorF

Brassblackball50mm(2”)diameter

WBGThighandlowaudibleandvisualalarmfunctions

AutoPowerOFFwithdisablefunction

Safety

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WARNING:Avoidelectromagneticinterference(EMI)toavoiderraticmeterreadings.

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WARNING:Themeasurementswillbeinaccurateiftheblackballistouchedduringatest.

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WARNING:Iftheblackballisdamageordeformedinshape,inaccuratemeasurement

valueswillresult.

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CAUTION:Pleaseplacethemeterinawarmtemperatureandlowhumidityenvironment

for24hoursafterthemeterhasbeenusedinanoverlyhumidenvironment.

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CAUTION:Pleasehavethemetercalibratedyearlyforthebestresults.

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WARNING:Donotstorethisdeviceindirectsunlightorinoverlyhotand/ordampareas.

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3HT200‐en‐GB_V1.411/16

MeterDescription

1. UpArrow/MAX‐MINbutton

2. MODE/SETbutton

3. PowerON‐OFFbutton

4. UNIT/DATAHOLDbutton

5. LCDDisplay

6. Temperature&Humiditysensor

7. BlackGlobesensor

8. Backlight/MEMbutton

9. SEL/Alarmbutton

10. Downarrow/RECbutton

11. ACAdaptorpowerjack

Note:Batterycompartmentonback



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4HT200‐en‐GB_V1.411/16

LCDDisplayDescription

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1. Alarmsymbol

2. DATAHOLDsymbol

3. WBGTMode

4. Maxreadingsymbol

5. Airtemperaturemode

6. Blackglobetemperaturemode

7. MIN(minimum)readingsymbol

8. Wetbulbtemperaturemode

9. USBsymbol(unusedinHT200)

10. Dewpointtemperaturemode

11. Primarydisplayarea

12. Temperatureunits

13. Relativehumiditymode

14. Secondarydisplayarea

15. Storedreading‘R’alert&MemoryRecall‘M’icon

16. Timesymbol(unusedinHT200)

17. Datesymbol(unusedinHT200)

18. DataRecordmodesymbol

19. SetModesymbol

20. Indoorsymbol(WBGT)

21. Outdoorsymbol(WBGT)

22. Lowbatterysymbol

23. Autopoweroffsymbol

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5HT200‐en‐GB_V1.411/16

Operation

Poweringthemeter

PressthePower buttontopowerthemeterONorOFF.Toshowallofthedisplaysymbols

atonce:withthemeterOFF,pressandholdthePower button.Thefirmwareversionwill

displayforonesecond(afterthebuttonisreleased).

AutoPowerOff

TheHT200automaticallypowersoffafterapproximately15minutesofinactivity.

Enable‐DisableAutoPowerOff

WithpowerON,pressandholdthePower buttonforatleast2secondstodisableor

enableautopower‐off.Theclock symbolappearsontheLCDscreenwhentheAutoPower

OFFfeatureisenabled.ThesymboldisappearswhentheAutoPowerOFFfeatureisdisabled.

Note:Theautopower‐offwillbedisablediftheSETfunctionorthealarmisenabled.

AlarmON‐OFF

PressandholdtheSEL/Alarm buttonforatleast2secondstoturnthealarmfunctionON

(armed)orOFF(disarmed).WhenarmedtheALARMdisplayiconwillappear.Whendisarmed,

theALARMdisplayicondisappears.

Note:ThealarmfunctionisdisabledwhentheHOLD,SET,orVIEWDATARECORDSDfunctionis

enabled.

DisplayBacklight

PresstheBacklight/Mem buttontoturnontheLCDbacklight.TheLCDbacklightwill

automaticallyturnoffafter15seconds.

SelectingTemperatureC/Funitsofmeasure

PresstheUnit/DH buttontoselectthedesiredtemperatureunitofmeasure.

ModeSelection

PresstheMode/Set buttontochangethemode.TheavailablemodesareWBGT,TA,%RH,

TG,WET,DEW,andbacktoWBGT(seedefinitionsbelow):

oWetbulbglobetemperature(WBGT)

oAirtemperature(TA)

oHumidity(%RH)

oBlackglobetemperature(TG):monitorstheeffectsofdirectsolarradiation

oWetbulbtemperature(WET)

oDewpointtemperature(DEW)

IntheWBGTmode,presstheSel/AlarmbuttontotoggleIN(indoor:withoutdirectsun

exposure)andOUT(outdoor:withdirectsunexposure)modes.

Note:ThemodefunctionisunavailableintheHOLDfunctionandSETfunctionmodes.

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DataHold

PressandholdtheUnit/DHbuttonfor2secondstoenabletheDataHoldfunction.The

HOLDdisplayiconwillappearthedisplayedreadingwillbefrozenuntilthebuttonispressedand

heldagain.

Note:TheHOLDfunctionisunavailablewhentheSETfunctionisenabled.

ManualDataRecording

PresstheREC buttontomanuallyrecord(store)thecurrentreading.TheRECandRsymbol

willbrieflyappearontheLCDwhilethereadingisstored.

Note:TheRecordReadingfunctionisunavailableintheHOLD,SET,andVIEWDATARECORDS

modes.

ViewDataRecords

PressandholdtheBacklight/Membuttontoturnaccess(orexit)theViewDataRecords

mode.WhentheViewDataRecordsmodeisaccessed,therecordnumberisshownonthe

bottomofthedisplay,theassociatedreadingisshownatthecenterortheLCD,andthe‘M’

memoryand‘REC’iconswillbevisible.

Usethearrowbuttonstoscrollthroughthestoredreadings.

PresstheMode/Setbuttontochangethemeasurementtype(i.e.WBGT,TA,%RH)forthe

currentlyselectedrecord.

PresstheUnit/DH buttontoswitchthetemperatureunit.

PressandholdtheBacklight/Membuttontoexittheviewingdatarecordsmode.

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Note:TheViewDataRecordsmodeisunavailablewhentheHOLDorSETfunctionisenabled.

Maximum‐Minimum(MAX‐MIN)ReadingRecording

PressandholdtheMax/Min buttontoentertheMAX‐MINrecordingmode.TheLCDwill

showtheMAXiconalongwiththemaximumtemperaturemeasurement.

UsetheMax/MinbuttontotogglebetweenMaximum(MAX)andMinimum(MIN)

readings.PressandholdtheMax/Minbuttonformorethan2secondstoexitthe

maximum/minimummode.

Note:TheMAX‐MINmodeisunavailablewhentheHOLD,SET,orVIEWDATARECORDSfunction

isenabled.

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7HT200‐en‐GB_V1.411/16

SettingMode

Pressandholdthe buttontoaccesstheSettingmodewhereaseriesofparameterscanbe

customized.Theavailableparametersareexplainedindividuallybelow.Toscrollthroughthe

parametersusethebutton.Pressthe buttontostarteditingaparticularparameteras

explainedbelow.

WBGTHIGHALARMTHRESHOLD(HI)



1. SteptotheWBGTHighAlarmThresholdscreenusingthebutton.

2. AttheHighAlarmThresholdscreen,pressthebuttontobeginediting;thedisplay

willbeginflashing.

3. Pressthe buttontoselectthedesiredtemperatureunits.

4. UsetheupanddownarrowbuttonstosettheWBGTHighAlarmThresholdvalue.

5. Usethebuttontoselectthedigittoedit.

6. Pressthebuttonagaintosavethesetting.

7. ThemeterwillnowaurallyandvisuallyalarmwhentheHighAlarmThresholdhasbeen

exceeded.Toarm/disarmthealarmfunction,refertothe‘ALARMON‐OFF’section.

WBGTLOWALARMTHRESHOLD(LO)



1. SteptotheWBGTLowAlarmThresholdscreenusingthebutton.

2. AttheLowAlarmThresholdscreen,pressthebuttontobeginediting;thedisplay

willbeginflashing.

3. Pressthe buttontoselectthedesiredtemperatureunits.

4. UsetheupanddownarrowbuttonstosettheWBGTLowAlarmThresholdvalue.

5. Usethebuttontoselectthedigittoedit.

6. Pressthebuttonagaintosavethesetting.

ThemeterwillnowaurallyandvisuallyalarmwhentheLowAlarmThresholdisreached.To

arm/disarmthealarmfunction,refertothe‘ALARMON‐OFF’section.

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8HT200‐en‐GB_V1.411/16

CLEARSTOREDREADINGS



1. Steptothe‘ClearStoredReading’screen(exampleshownabove)usingthe button.

Thenumberatthebottomofthedisplayindicatesthenumberofreadingsstored(50

maximum).

2. Pressthe buttonandthedisplaywillbeginflashing.

3. UsetheupordownarrowbuttontoselectYESorNO.SelectYEStoeraseallstored

readings.PressNOtoretainthereadingsinmemory.

4. Pressthebuttontoperformtheselectedaction(YESorNO).



AIRTEMPERATUREOFFSET



1. SteptotheAirTemperatureOffsetscreenusingthebutton(examplescreenshown

above).

2. Pressthebuttontobeginediting;thedisplaywillbeginflashing.

3. Usetheupanddownarrowbuttonstosettheoffsetvalue(from‐9.9to+9.9)

4. Pressthe buttontoselectthedesiredtemperatureunits.

5. Pressthe buttonagaintosavethesetting.



RELATIVEHUMIDITY%OFFSET



1. SteptotheRH%Offsetscreenusingthebutton(examplescreenshownabove).

2. Pressthebuttontobeginediting;thedisplaywillbeginflashing.

3. Usetheupanddownarrowbuttonstosettheoffsetvalue(from‐9.9to+9.9).

4. Pressthebuttonagaintosavethesetting.



www. .com information@itm.com1.800.561.8187

EXTECHINSTRUMENTS

9HT200‐en‐GB_V1.411/16

BLACKGLOBETEMPERATUREOFFSET



1. SteptotheBlackGlobeTemperatureOffsetscreenusingthe  button(example

screenshownabove).

2. Pressthe buttontobeginediting;thedisplaywillbeginflashing.

3. Usetheupanddownarrowbuttonstosettheoffsetvalue(from‐9.9to+9.9).

4. Pressthe buttontoselectthedesiredtemperatureunits.

5. Pressthebuttonagaintosavethesetting.

BatteryReplacement



Whenthebatteryicon() appearsontheLCD,the9Vbatterymustbereplaced.Turnoffthe

powerandunplugallcables.Removethebatteryfromtherearbatterycompartmentand

replaceitwithanew9Vbattery.Pleaseobservecorrectbatterypolarityanddonotswitchthe

unitONuntilthebatterydoorisclosedandsecured.

Whenthemeterisnotinuse,pleaseremovethebattery.

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.

ACAdaptorPower

TheACpoweradaptorjackislocatedonthebottomofthemeter.Seespecificationsbelow:



ExternalACtoDCadapter:Voltage9VDC(8~14VDCMax)/500mW.

Socket:Pinpositive,Groundcasingnegative.

Externaldiameter5.5mminternaldiameter2.1mm



www. .com information@itm.com1.800.561.8187

EXTECHINSTRUMENTS

10HT200‐en‐GB_V1.411/16

Specifications

Wetbulbglobetemperature(WBGT)

UnitRangeResolutionAccuracy(calculated)

@15~40oC

Indoor

&

OutdoorWithout

sunlight

°C0~59.00.1WBGT=

(0.7×WET)+(0.3×TG)

°F32.0~138.00.1WBGT=

(0.7×WET)+(0.3×TG)

Outdoor

Withsunlight

°C0~56.00.1WBGT=(0.7×WET)+

(0.2×TG)+(0.1×TA)

°F32.0~132.00.1WBGT=(0.7×WET)+

(0.2×TG)+(0.1×TA)

AirTemperature(TA)

UnitRangeResolutionAccuracy@15~40oC

°C0~50.00.1±0.8

°F32.0~122.00.1±1.5



Blackglobetemperature(TG)

UnitRangeResolutionAccuracy@15~40oC

°C0~80.00.1±0.6

°F32.0~176.00.1±1.1

RelativeHumidity(%RH)

MeasurementRange1%~99%

Accuracy±3.0%RH(20~80%)

±5.0%RH(<20%or>80%)

Resolution0.1%

www. .com information@itm.com1.800.561.8187

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