Teledyne 633 Manual

A SERVICE OF

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Teledyne Advanced Pollution Instrumentation Model 633 Aethalometer

®

Black Carbon Monitor User Manual

07645A DCN6170 61

5.5Manualstabilitytest

Stabilitytestisconductedwithoutflowtodeterminetheperformanceofthelightsource–

detectorpair.IntheOperation/Generaltabselectthedesiredtimebaseandclick“Stability”

buttontostartthetest.Stabilitytestismarkedbystatus1024.DuringthetestBCvalueswill

becalculatedassumingthereis5LPMairflow.Manuallystopthetestwhenthedesiredtest

durationiscomplete.

Interpretation of the results:

-AverageBCvaluesshouldbeclosetozeroiftheAethalometeriswarmedup(was

measuringforafewhoursjustbeforeconductingthetest).

‐PointtopointvariationofBC(PPBC)iscalculatedasanaverageabsolutedifference

betweentheconsecutiveBCmeasurements.Itdependsonthetimebase,testedchannel

andspot.Forexampleat1stimebasePPBC61=approx.400ng/m

3

.

5.5Manualcleanairtest

Cleanairtestisconductedusingthebuilt‐infiltertodeterminetheperformanceof

Aethalometerunderthestandardflowcondition.IntheOperation/Generaltabselectthe

desiredtimebaseandflow,thenclick“Cleanair”buttontostartthetest.Cleanairtestis

markedbystatus2048.Manuallystopthetestwhenthedesiredtestdurationiscomplete.

Interpretation of the results:

‐AverageBCvaluesshouldbeclosetozeroiftheAethalometeriswarmedup(was

measuringforafewhoursjustbeforeconductingthetest).Itispossibletoobservea

shorttransientduetofiltercompression.

‐PointtopointvariationofBC(PPBC)iscalculatedasanaverageabsolutedifference

betweentheconsecutiveBCmeasurements.Itdependsontheselectedtimebase,flow

andtestedchannel.ForexamplePPBC61=approx.500ng/m

3

at5LPMand1s

timebase.