Extech Instruments AN320 Manual

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AN320-en-GB_V1.2 11/14

ErrorMessages

Errorcodesandsolutions

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AirTemperature

E02:Temperaturereadingislowerthanthelowrangelimit.Placethemeterinroom

temperaturefor30minutes.IfE02continues,sendtheunittoExtechforrepair.

E03:Temperatureexceedsthehighrangelimit.Placethemeterinroomtemperaturefor30

minutes.IfE03continuestoappear,

sendtheunittoExtechforrepair.

E31:TheA‐to‐Dconverterrequiresreplacing.SendthemetertoExtechInstrumentsforrepair.

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RelativeHumidity(RH)

E04:Temperatureerrorcorruptedthehumidityreading.Checkthetemperatureerrorsolution

section.

E11:RHcalibrationerror.SendtoExtechInstrumentsforrepair.

E33:RHmeasurementcircuiterror.SendtoExtechInstrumentsforrepair.

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DewPoint(DP)andWetBulb(WBT)Temperature

E04:TemperatureorRHerror.ChecktemperatureorRHerrorsolutions.

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Airvelocity

E03:Velocityexceedsthehighrangelimit.Testthemeterusinganairvelocitythatisknown

tobewithinthespecifiedrangelimits.SendtheunittoExtechforrepairiftheE03error

messagepersists.

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Airvolume

E03:Readingexceedsthemeter’sdisplaylimit.CheckthattheAREAsettingiscorrectinthe

SetupMode.

E04:Airvelocityerror.ReturnmetertoExtechforrepair.

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CO2

E01/E33:VoltagetooloworCO

moduleerror.Checkifthelowbatteryiconisdisplayedon

theLCD,ifyes,replacewithnewbatteries.Tryarecalibration,orsendtheunittoExtechfor

repairiftheproblempersists.

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OtherErrors

E32:MemoryICerror.Rebootthemeterandcheckitagain;sendittoExtechInstrumentsfor

repairiftheerrormessagepersists.

Nodisplay

1. Checkthatthebatteriesaremakinggoodcontactandarealignedforcorrectpolarity.

2. Replacebatteries.

DisplayswitchesOFFautomatically

Thissymptomcouldbethenormal‘SleepMode’whichswitchesthemeterOFFafter20

minutesofin‐activity.Ifthisisnotthe‘SleepMode’,checkwhetherthelowbatteryindicator

appearsbeforetheLCDattemptstoswitchON;ifyes,replacethebatteries.

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