Model DA40 User Manual
Contents
1. 800 283 1141or 715 723 1141 Fax 715 723 7890 sales pacer instruments com DA40UserManual PacerInstruments Inc Rev1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 INTRODUCTION Pacer smodelDA40digitalanemometerisaversatileinstrumentformeasuringairvelocityfromHVACducts orprocessairflow Theheavy allmetal exceptelectronics probecanbeusedforairstreamsthathaveawiderangeofhumidity temperatureandcontaminantswithoutcompromisingaccuracy Featuresincludechoiceofprobediameters customcablelengths toleranceoftemperaturesupto210 F 98 9 C attheprobe anddurability SECTION1 SPECIFICATIONS Range AP275probe 40 7800FPM 0 2 40 0MPS AP100probe 60 6800FPM 0 3 35 0MPS Accuracy 1 0 ofreading 1digit Resolution 1FPMor0 01MPS OperatingTemperature Instrument 32to125 F 0to50 C Probes 4 to210 F 20 to98 9 C PowerSupply 2AAalkalinebatteries E91Evereadyorequivalent BatteryLife Approximately300hours Batterycheck Automaticlowbatterydisplay Dimensions Instrument 7 1 x3 0 x0 8 AP275probe 2 diameter AP100probe 1 diameter Weight 8ounceswithbatteries Display 0 5 LCD 4digits Options ModelCG 4charger PN3303 with4NiMHbatteries Additionalprobe AP100 1 orAP275 2 Cablelongerthan5 Model3834 specifylength Extraextensionrod PN5001rigid PN5002flexible 1450FirstAve Page4of9 ChippewaFalls WI54729 800 283 1141or 715 723 1141 Fax 715 723 7890 sales pacer instruments2. 1450FirstAve Page1of9 ChippewaFalls WI54729 800 283 1141or 715 723 1141 Fax 715 723 7890 sales pacer instruments com DA40UserManual PacerInstruments Inc Rev1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 ModelDA40 UserManual 1450FirstAve Page2of9 ChippewaFalls WI54729 800 283 1141or 715 723 1141 Fax 715 723 7890 sales pacer instruments com DA40UserManual PacerInstruments Inc Rev1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 Warranty Thisproductisfullywarrantedagainstdefectivematerialsand orworkmanshipforaperiodofoneyear afterpurchase provideditwasnotimproperlyused Foryourprotection pleaseusethisproductassoonas possible Ifreturned itmustbesecurelywrapped sentprepaidandinsuredto PacerIndustries Inc 1450FirstAvenue ChippewaFalls WI54729 PH 715 723 1141 FX 715 723 7890 Pleaseincludeanotewithname address telephonenumberanddescriptionoftheproblem Althoughwe provideassistanceonPacerproductsbothpersonallyandthroughourliterature itisstillthetotal responsibilityofthecustomertodeterminethesuitabilityoftheproductforuseintheirapplication ThismanualisprovidedbyPacerIndustrieswithoutanykindofwarranty Precautionshavebeentakenin accuratelypreparingthismanual however weneitherassumeresponsibilityforanyomissionsorerrorsthat mayappearnorassumeliabilityforanydamagesthatresultfromtheuseoftheproductsinaccordancewith theinformationcontainedinthemanual 1450FirstAve Page3of9 ChippewaFalls WI54729
3. APPENDIXAfordescriptionofalgorithmthatdeterminesMAXandMIN ClearinternalmemorybyturningunitOFF Clearthe MAX MIN modebypressinganyother key except HOLD HOLD RESETPressing HOLD RESET keywillfreezethereadingonthedisplay HOLD isdisplayed andthereadingisheld Pressing HOLD RESET keyasecondtimefreesthedisplay SECTION3 OPERATION NOTE Unitshouldbe OFF beforechangingbatteriesorattachingprobe 1 Removebatterycompartmentlidandinsertbatteries replacelid seeAPPENDIXD 2 Attachtheprobecablebyaligningthekeyway s insertingconnector s andturningcollar s to tighten seeAPPENDIXBforconnectorwiringdiagram 3 Pressthe ON OFF keytoturnunitON Thedisplaywillshowallitselements see APPENDIXC followedbytheremainingbatterycapacity bA85 meansthebatteryisat85 capacity followedby 2 75 or 1 00 indicatingtheAP275orAP100probe respectively is attached NOTE Whenthebatterysymbolappearsduringnormaloperation replacethebatteries 4 Press FPM MPS key ifnecessary todisplaydesiredunits Placeprobeintheairstreamwith directionarrow ifpresent inthedirectionoftheairflow TocalculateCFMseeAPPENDIXE 5 Tocorrectlymeasuretheairvelocityfromalargeduct setunitto 16SEC modeandmove probeabouttheareaoftheopening After16seconds theunitwilldisplaythevelocityforthe preceding16seconds updatingafterthatevery2secondsbyaddingthelatest2second measurementanddroppingtheoldest2secondmeasurement 6 Togetmaximumreadingssinceturn on press MAX MIN key toge
4. com DA40UserManual PacerInstruments Inc Rev1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 Included 1piece vane typeprobehead choiceofAP100orAP275 3pieces PN5001rigidextensionrod 1piece PN5002flexibleextensionrod 1piece PN38345ft connectioncable 2pieces AA1 5Valkalinebatteries 1piece PN6004hard shellcarryingcase 1piece M2942operationmanual SECTION2 SWITCHFUNCTIONS ON OFF Pressing ON OFF keyswitchesunitON PressingthekeyasecondtimeturnsitOFF FPM MPS Pressing FPM MPS keytogglesunitfromFPM 1FPMresolution toMPS 0 01MPS resolution 2SEC Pressing 2SEC keysetsmeasurementperiodtotwoseconds Thedisplaywillshow 2SEC thenameasurementvalue Itwillupdateeverytwosecondswithaverageoftheprecedingtwo seconds 16SEC Pressing 16SEC keysetsmeasurementperiodtosixteenseconds Thedisplaywillshow 16 S for16sec thenameasurementvalue Itwillupdateeverytwosecondswithaverageofthe precedingsixteenseconds 1450FirstAve Page5of9 ChippewaFalls WI54729 800 283 1141or 715 723 1141 Fax 715 723 7890 sales pacer instruments com DA40UserManual PacerInstruments Inc Rev1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 MAX MIN Pressing MAX MIN keydisplaysthehighestreadingsinceturn on Pressingkeyasecondtime willdisplaylowestreadingsinceturn on In 2SEC modedisplayreads H2 L2 followedbyreading In 16SEC modedisplayreads H16 L16 followedbyreading See
5. m VolumeFlow CFM Velocity FPM XArea sqft InrectangularductworkthiscrosssectionalareaequalstheWidthtimestheHeight WxH A cross sectionalarea 1450FirstAve Page8of9 ChippewaFalls WI54729 800 283 1141or 715 723 1141 Fax 715 723 7890 sales pacer instruments com DA40UserManual PacerInstruments Inc Rev1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 Incircularductworkthiscrosssectionareaequalstheradiussquaredtimes 3 14 RxRx3 14 A cross sectionalarea Toconvertanareacalculatedinsquareinchestoanareacalculatedinsquarefeet whichis requiredfortheVolumeFlowequationabove divideby144 areainsqin 144 areainsq ft Example Theairductisrectangular thewidthis24in andtheheightis12in Theairvelocityreading throughtheductis450FPM CalculatetheVolumeFlow Step1 Cross sectionalarea 24in x12in 288sqin Step2 288sqin 144 2sqft Step3 Volumeflow AirVelocityxArea therefore Volumeflowrate 450FPMx2sqft 900 CFM Notes 1450FirstAve Page9of9 ChippewaFalls WI54729 800 283 1141or 715 723 1141 Fax 715 723 7890 sales pacer instruments com DA40UserManual PacerInstruments Inc Rev1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 Notes
6. tminimumreadings press MAX MIN keyasecondtime Forexplanationofthedisplayedviews see MAX MIN paragraphinSECTION2 alsoAPPENDIXA 7 ToHOLDthedisplayedreading pressthe HOLD RESET key Presskeyagaintoclearthe HOLDcondition 1450FirstAve Page6of9 ChippewaFalls WI54729 800 283 1141or 715 723 1141 Fax 715 723 7890 sales pacer instruments com DA40UserManual PacerInstruments Inc Rev1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 APPENDIXA MAX MINCALCULATIONS A 1stMAXreading Alsofirstminimumreading tobereplacedatB B This1stMINatBisthelowestyetandwillberegisteredasvelocityincreases C This2nd higherMAXatCwillregisterasthevelocitydecreases replacing1stMAX D This2ndMINatDishigherthantheMINalreadyregisteredandwillbeignored E This4thMINatEislowerthanthe1stMIN registeredatB andwillreplaceit F ThezerocrossingatFdoesnotformaMINandwillbeignored Thisprotectsagainstfalse MINreadingswhentheprobeiswithdrawnfromtheairstream APPENDIXB CONNECTORDIAGRAM 1450FirstAve Page7of9 ChippewaFalls WI54729 800 283 1141or 715 723 1141 Fax 715 723 7890 sales pacer instruments com DA40UserManual PacerInstruments Inc Rev1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 APPENDIXC LCDDISPLAYSYMBOLS APPENDIXD CHANGINGBATTERIES APPENDIXE AIRFLOWVOLUMECALCULATIONS Theory Tocalculatecubicfeetperminute CFM fromameasuredairvelocity FPM youneedthe calculatedcross sectionalareaoftheairflowstrea
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