Extech Instruments AN340 Manual

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AN340-EU-EN V1.3 4/13

MODEbutton

Momentarypresstostepthroughtheavailablemodes:airvelocity,airvolume,airtemperature,relative

humidity,wetbulbtemperature,dewpointtemperature.



AVERAGE,MAXIMUM,MINIMUM,andENTERbutton

Presstoviewaverage/minimum/maximumreadings.Alsousedtoconfirm(enter)aselectionwhile

programming.



START,ESCbutton

Inthenormaloperatingmode,pressandholdfortwo(2)secondstostartorstoptheautomaticdatalogger.

Also,presstoexit(escape)AVG/MIN/MAX,RECALL,andSETUPmodes.



HOLD,UPARROWbutton

Inthenormalmode,presstofreeze/un‐freezethedisplayedreading.ItisalsousedtomoveUPinamenulist.



LW‐D‐A(LENGTH/WIDTH‐DIAMETER‐AREA)button

IntheAirVolumemode,pressthisbuttontobeginprogrammingtheAREAvaluefortheductundertest.This

buttonisalsousedtomoveDOWNamenulist.



MEM‐RECALLbutton

Inthenormalmodeofoperation,pressthisbuttontomanuallyrecordareadingintothemeter’s99location

memory.Pressandholdfortwo(2)secondstorecallandreviewthemanuallyrecordeddataonereadingata

time.



and 

WiththemeterOFF,pressandholdthesetwobuttonstodisablethesleepmode.Sleepmodeswitchesthe

meteroffautomaticallyafteratwenty(20)minuteperiodofinactivity.

and 

WiththemeterOFF,pressandholdthesetwobuttonsuntilPCappearsontheLCD.Themeterisnowreadyto

communicatewithaPC.ForinstructionsontheuseofthePCinterfacepleaserefertotheHELPutilityprovided

onthesuppliedCD‐ROM.

