Model 633 Aethalometer® Black Carbon Monitor User Manual | Teledyne Advanced Pollution Instrumentation |
Figure 2. Aethalometer data sorted and averaged according to loading (attenuation, ATN) on spot –
roadside location in London, UK (top); urban site in Boston (Roxbury), USA (bottom).
The London data show a systematic reduction at increasing loadings; while the Boston data do not. This demonstrates that any method intended to compensate for the ‘spot loading effect’ must be auto‐adaptive and able to adjust dynamically to different situations. An instrument based on firmware with a fixed ‘loading non‐linearity’ parameter will not operate correctly at all locations. The ‘loading non‐linearity’ parameter must be measured.
8 | 07645A DCN6170 |
