Teledyne 633 Manual

A SERVICE OF

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Teledyne Advanced Pollution Instrumentation Model 633 Aethalometer

®

Black Carbon Monitor User Manual

07645A DCN6170 11

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14:30:00 14:35:00 14:40:00 14:45:00 14:50:00 14:55:00 15:00:00 15:05:00 15:10:00

1 second time-base

30 per. Mov. Avg. (1 second time-

base)

131 ng/m

3

119 ng/m

3

Point-to-point variation @ 1 second:

126 ng/m

3



Figure4.‘Zeroair’check–theModel633Aethalometerswitchesfromsamplingambientairtofiltered

air–1secondtimeresolutionpointtopointvariationisverystable.

TheresponseoftheopticaldetectorsoftheModel633Aethalometermaybeverifiedusinga

standardkitofNeutralDensityopticalfilters.Theseareglasselementswitharangeofknown

and stable optical absorptions, from light to dark, which aretraceable from manufacturing

records back to primary standards.  When these are inserted into the Model 633

Aethalometer, its photodetectors will give a certain output signal.Thestabilityand

reproducibility of the relationship between optical signal and ND Filter density from one

validationtesttoanother;andthecomparisonwiththeoriginalfactoryvalues;isameasureof

theconsistencyofperformanceoftheinstrument’soptics.

1.1.3 User and Communications Interfaces

The Model 633 Aethalometer incorporates the following user, data and communications

features:

• 21‐cm(8.25”)colorgraphicstouch‐screenfordatadisplayandlocaluserinterface;

• USBportsforinsertionofamemorystickforlocaldatadownload;

• USBportsforconnectionofakeyboard,ifnecessaryforinitialsetup ofparameters,

suchasstationidentification;

• RS‐232COM portsfor datatransmissionfrom auxiliaryinstrumentsortothedigital

datalogger;

(Ethernetportinstalledforfuturesoftwareimplementation).