Teledyne 633 Carbon Monoxide Alarm User Manual


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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
Figure4.‘Zeroair’check–theModel633Aethalometerswitchesfromsamplingambientairtofiltered
air–1secondtimeresolutionpointtopointvariationisverystable.
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).
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