Specifications

382275/6-EU-EN v4.3 3/14
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OverloadProtection
OUP:OverVoltageProtection
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Thisunithasabuilt‐inover‐voltageprotectionfeature . Intheeventofanoutput
voltageexceeding theallowablerange(refertothespecifi cationssectionfor ra nge 
limits),protectionwillbetriggere d andtheoutputpowerwillbeswitchedoff.(OUP
warningappears).
Torese tthewarning,switchof fthe
power supplyandremoveallloading.Switchthe 
unittoresumenormaloperation.Ifthisproblempersists,pleasecontactExtech
TechnicalSupport.
OTP:OverTemperatureProtection
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Theunithousesathermo‐sensorthatmonitortodetermineifanover‐heating
conditionexists.TheOTPwarningwillappearonthedisplayandthe outputwillswitch
offinover‐heatingconditiondoes exist.When thiswarningappears,switc h offtheunit
andremoveallloading.
Inthesecases,
che cktheloa dandtheoutputsettingsandthen allowtheunittocool
foratlea st30minutes.
Ensuretha ttheventilationopeningsarenotblockedandthatthepowersupplyhas 
properclearance.Ensurethatthecoolingfanisoperational;neverusethepower
supplywithafaulty
coolingfan.
OLP:OverLoadProtection
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NormallytheoverloadprotectionisprovidedbytheCCconstantcurrentmode.
However,iftheCCmodefailsitmaycauseseriousdamagetothetestpieceortothe
load.OLPisusedtominimizetheextentofthedama ge totheload.Switch offthe
powersupplyassoon
asthiswa rningappears.Toresetthiswa r n ing ,switchofftheunit
andremoveallloadingandthenswitchtheunitonagain.Ifthisproblemper si s ts , 
pleasecontactExtechTechnicalSupport.
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