Extech Instruments RHT30 - Display (LCD) Description; LED Status Indicator Description

4RHT30_TH30‐en‐GB_V1.0(11/16)
Display(LCD)Description
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F
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C Temperatureunitofmeasureasprogrammedbytheuser
RH% DisplayedwhenshowingRelativeHumidityreading(RHT30)
T1  Representstheinternalsensor(air)temperature(TH30)
T2Representstheexternalprobetemperature.Ifnoprobeisconnected,
thedisplaywillshowdashesfortheT2temperaturereading(TH30)
H  HighAlarmtriggered
L LowAlarmtriggered
RECRECflashesoncepersecondwhenactivelydatalogging.Whenloggeris
programmedwitha‘StartDelay’,RECisdisplayedbutdoesnotflash
untilafterthedelaytimehaselapsedandtheloggingbegins
Batteryiconflashesoncepersecondwhenbatteryleveliscriticallylow
MXDisplayedwhenthemaximumrecordedreadingisselectedwiththe
MAX‐MINbutton
MN Displayedwhentherecordedminimum(MN)readingisselectedwith
theMAX‐MINbutton
LEDStatusIndicatorDescription
Thedualcolor(red/green)LEDstatusindicatorislocatedtotherightoftheLCD.
 Red(Alarm):Blinksredevery10secondsinanalarmcondition
 Green(Datalogging):Blinksgreenevery10secondswhileactivelydatalogging
 Green(PCconnection):GlowssteadygreenwhileestablishingconnectiontoPC
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