Extech Instruments AN340 Manual

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AN340-EU-EN V1.3 4/13

DIAMETER(Area)Mode

 Whenthe‘D’isshownatthetopoftheLCD,themeterisreadytoacceptacircularduct’s

Diameterincentimetersorinches.

 Usethe buttonONLYtochangethevalue oftheflashingdigit(pressingthedownarrow

willcausethescreento

changefromDiametertoArea).UsetheENTERbuttontomovefrom

digittodigit.

 WhenfinishedenteringtheDiameter,andwiththeright‐mostdigitflashing,presstheENTER

buttontoreturntothemainoperatingmode.

 Themeterautomaticallycalculatesthe areaoftheductand,whenvolumemeasurements

aretaken,theLCDwillshowaccurateairvolume(flow)inCMM/CFMunits.

EnteringtheAREAValueManually

 Whenthe‘A’isshownatthetopoftheLCD,themeterisreadytoacceptanAreavalue

directlyinsquarecentimetersorsquareinches(cm

orinch

).Note:UsetheLW‐D‐Abutton

fromtheAirVolumemeasurementmodetoaccessthe‘A’screenifnecessary.

 Usethe buttonONLYtochangethevalue oftheflashingdigit(pressingthedownarrow

willcausethescreentochangefromAreatoLength).UsetheENTERbuttontomovefrom

digittodigit.

 WhenfinishedenteringtheDiameter,andwiththeright‐mostdigitflashing,presstheENTER

buttontoreturntothemainoperatingmode.

 Nowwhenvolumemeasurementsaretaken,theLCDwillshowairvolume(flow)in

CMM/CFMunits.