LumaSense Technologies INNOVA 1314i - Manual (Page 150)

Chapter 12
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BE6030-13 1314i Photoacoustic Gas Monitor LumaSense Technologies A/S
Page 150 of 199
Before setting-up a calibration task, make sure that the filter banks
you make active for the filters which have already been calibrated
only contain calibration factors which need to be up-dated. In this
way you can prevent your original calibration factors being
overwritten by the new ones. To illustrate this, imagine that filters
“A”, “B”, “C” and “D” are installed in your Monitor and have been
calibrated. Suppose the calibration data block of your Monitor
contains the information shown in Fig.12.9 (notice no filter is
installed in position E). Suppose you now install an optical filter in
position “E”. This filter has to be fully calibrated. Before performing a
zero-point and humidity-interference task one of the following filter
banks must be made active:
· Filter bank no. 3, 4 or 5 for filter “A”;
· Filter bank no. 2, 3 or 5 for filter “B”;
· Filter bank no. 2, 3 or 4 for filter “C”;
· Filter bank no. 2, 3, 4 or 5 for filter “D”.
Suppose you make filter bank no. 3 active for all the above filters
and filter bank no. 1 active for filter “E”. Then, after a zero-point
calibration the calibration data block would contain the information
shown in Fig.12.10 . None of the original calibration data has been
overwritten by the newly-calculated calibration factors.
Fig.12.9 Illustration of the calibration data stored in the filter banks
of filters “A” to “D” before a zero-point calibration task