Honeywell ACM 150 Manual To Installation, Operation, And Maintenance page 129

ACM 150
Evaluating/resolving spectral balance
You evaluate the spectral balance using a Background spectrum. A Background
spectrum is provided in "Acquire Background"
78, having the same overall shape and peaks.
Figure 78. Correct background spectrum
Figure 79. Problem Background Spectrum
1. Compare your Background spectrum to the spectrum shown in
Note the intensity of region A (2000 cm
2. The intensity at region B should be at least 20% of the intensity at region A. If
it is 20% or higher, the spectrum is balanced. If less than 20%, the spectrum is
imbalanced and It has an inadequate S/N in region B. This is resolved by cleaning
(or replacing) the gas cell and/or by improving alignment.
3. Follow the instructions in
Figure 68.
) and region B (4000 cm
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Servicing the gas cell.
129
It should look like Figure
Figure 78.
)
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