User manual

AN310-EU-EN V1.2 1/13
6
Operation
AirVelocityandAirVolumeMeasurements
1. SwitchthemeterONbypressingthePOWER buttonmomentarily.PressthePOWER
buttonagaintoswitchthemeterOFF.
2. Notethatthemeterwillautomaticallyenterthesleepmodeafter20minutesofinactivity.
Todisablethisfeature:withthemeterOFF,pressandholdthePOWERandtheU/mode
buttonsfor2seconds.TheLCDwilldisplay'n'asitswitchesON.Nowthesleepmodeis
disabledandtheusermustpressthePOWERbuttonmomentarilytoswitchthemeterOFF.
3. WhenthemeterisON,theupperdisplaycanindicate
airvelocityorrelativehumidity(usetheU/modebutton
totoggle).The
lowerdisplaydigitscanindicateairflow,
dewpointtemperature,wetbulbtemperature,orair
temperature(usetheL/modebuttontoscroll).
4. Placethesensorintheairstream.Theairmustenter
thevanefromtherearofthemeter.TheAir
TemperatureandRelativehumiditysensorsare
locatedatthecenterofthevaneontherear
ofthemeter.
5. ReadthemeasurementdataontheLCD.Airvelocityreadingsareindicatedinmetersper
second(m/s)orfeetperminute(fpm).Temperaturereadings(air,dewpoint,orwetbulb)
areindicatedin°C/°F.RelativeHumidityis
indicatedin%.Airflow(volume)isindicatedin
CFM(cubicfeetperminute)orCMM(cubicmetersperminute).UsetheL/modebutton(for
lowerdisplay)andtheU/modebutton(forupperdisplay)toscrollthroughthedisplayed
readingoptions.
6. TochangebetweenImperialandMetricunitsof
measurerefertotheSETUPModesection.
7. TomeasuretheAirVolumeofaduct,firstmeasuretheduct’sarea(seetheAppendixfor
areacalculations)andthenentertheareavalueinthemeter’sSETUPmodeinin
2
orcm
2
.
Aftertheareavaluehasbeenentered,usetheL/modebuttontoscrolltotheairvolume
display(CMM/CFM)onthelowerdigits.Placethemeterinairstreamtomeasurevolume.
8. Optionally,measureAirVolumewithanairflowconeadaptorbyfirstattachingoneofthe
adaptorsto
themeter(theoptionalconeadaptorkitincludesaroundandasquarecone;kit
partnumberAN300‐C).Themeterwillautomaticallyrecognizetheadaptorandthe‘INSERT
ConeShape’promptwillappearontheLCD(theadaptoriconwillalsoappear).Selectround 
orsquareusingthemeter’s
keypad.Notethat,regardlessoftheAREAsettinginthe SETUP
mode,themeterwilldefaulttothedimensionsoftheattachment(Square:356x346mm
[13.6x13.6”);Round:210mm[8.3”]diameter).NOTE:Ensurethattheairflowadaptoriswell
mountedandlockedbeforetakingmeasurements.
LCDbacklight
PresstheU/modebuttontoswitchONtheLCDbacklight.Thebacklightwillautomaticallyswitch
OFFafterapproximately10secondstoconservebatterypower.Notethatthebacklighting
switchesONautomaticallywhenthemeterisswitchedONbytheuser.