User Manual
RH520A-EU-EN v4.4 8/13
2
Introduction
Congratulations on your purchase of the Extech RH520A Temperature + Humidity Chart
Recorder.TheRH520AmeasuresanddisplaysTemperature,Humidity,andDewPoint.
The remote (detachable) probe senses the ambient conditions while the LCD display graphs
and provides numerical representation of the readings. Programmable audio‐visual alarms
alert the user when
ambient conditions reac h alarm presets. The optional alarm module
permitsautomaticrelayswitchingwhenalarmpresetsarereached.
TheRH520AInternalMemorycanstoreupto49,152measurementsforlatertransfertoaPC.
Carefuluseofthisinstrumentwillprovideyearsofreliableservice.
CAUTIONS
Thisdeviceisnotatoyandmustnotreachchildren’shands.Itcontainshazardousobjects
aswellassmallpartsthatthechildrencouldswallow.Incaseachildswallowsanyofthem,
pleasecontactaphysicianimmediately
Donotleavebatteriesandpackingmateriallyingaroundunattended;
theycanbe
dangerousforchildreniftheyusethemastoys
Incasethedeviceisgoingtobeunusedforanextendedperiodoftime,removethe
batteriestopreventthemfromtraining
Expiredordamagedbatteriescancausecauterizationoncontactwiththeskin.Use
protectivehandglovesinsuchcases
Seethatthebatteriesarenotshort‐circuited.Donotthrowbatteriesintothefire.