Model 633 Aethalometer® Black Carbon Monitor User Manual | Teledyne Advanced Pollution Instrumentation |
The Model 633 Aethalometer has been developed with input from the research and monitoring communities, and is designed for reliable operation under all conditions ranging from state‐of‐the‐art research to compliance monitoring.
The leading innovations incorporated into the Model 633 include:
The DualSpot™ measurement method, which solves the effects common to all filter‐ based real‐time monitors, in which the instrumental response factor shows a dependence on the loading of material on the filter.
Features for automatic ‘dynamic zero’ testing under a flow of internally‐generated clean air; ‘span’ testing of the response of the optical sources and detectors; calibration of the response of the internal mass flow meters, if an external standard flow calibrator is connected; and validation of the photometric response by use of a kit of ‘Neutral Density’ optical filters whose properties may be traced to reference standards.
User and communications interfaces, permitting remote monitoring of operation; data retrieval; performance of internal tests; and reporting of ‘state‐of‐health’ parameters.
Modular construction designed for ease of routine maintenance service.
In addition to the above features, the Model 633 Aethalometer offers real‐time aerosol absorption analysis at up to seven optical wavelengths, with rapid time resolution to 1 second even in multiple‐wavelength mode. This permits the measurement of optically‐absorbing aerosols – ‘Black’ Carbon and ‘Brown’ Carbon components of particulate matter – in applications including routine monitoring of ambient air quality for regulatory purposes; measurements of the concentration of BC in urban, suburban, regional, rural and remote locations; source testing; and laboratory‐based research.
1.1.1 ‘DualSpot™’ Technology
The Model 633 Aethalometer uses the patented DualSpot™ method to compensate for the ‘spot loading effect’; and also to provide a real‐time output of the ‘loading compensation’ parameter, which may provide additional information about the physical and chemical properties of the aerosol.
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