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Evaluation of Optical Instruments for Real-Time Continuous Monitoring of Smoke Particulates

Evaluation Results and Discussion (continued)

Real-Time Continuous Monitoring Results (continued)

MIE DataRam

1998 Laboratory Tests—Two DataRams were used for the 1998 laboratory tests. Concentrations measured by the gravimetric sampler during the tests ranged from 20 to 450 µg/m³. Figures 18, 19, and 20 show the results. DataRam No. 1 had a slope of 1.93 with an R² of 0.98, indicating that it overestimated the mass concentration results from the gravimetric sampler by 93 percent. DataRam No. 2 had a slope of 2.16 with an R² of 0.97 when its results were compared to the gravimetric results. Comparison results between the two instruments indicate DataRam No. 2 read 13 percent higher than DataRam No. 1. The slope of the line for the instrument comparison was 1.13 with an R² above 0.99, indicating excellent reliability but a need to calibrate each instrument.

Figure 18—Comparison of the 1998 laboratory results from
DataRam No. 1 and the gravimetric sampler. Gravimetric
results are from the Fire Sciences Laboratory gravimetric sampler.

Figure 19—Comparison of the 1998 laboratory results from
DataRam No. 1 and the Fire Sciences Laboratory
gravimetric sampler.

Figure 20—The 1998 laboratory results of the two DataRams
plotted against each other.

MIE DataRam continued

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