LumaSense Technologies INNOVA 1314i - Manual (Page 161)

Chapter 12
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BE6030-13 1314i Photoacoustic Gas Monitor LumaSense Technologies A/S
Page 161 of 199
Fig.12.14 Curve showing a linear span-calibration curve
Choosing a filter bank
If a filter (e.g. “A”) has already been calibrated to measure a gas
(e.g. A1) and you wish to calibrate with gas A1 again, then select the
filter bank containing the gas conversion factor for gas A1. Online
users can do this when downloading the calibration factors. Stand-
alone users should do this before setting-up and performing the span
calibration task. The gas conversion factor calculated during the
span calibration will then just overwrite the gas conversion factor
calculated during the previous span calibration of the filter with this
gas.
If you wish to span calibrate a filter to measure more than one gas,
then select a new filter bank each time you span calibrate with a
different gas. In this way the conversion factor for each gas is
stored in separate filter banks (for stand-alone use see Fig.12.9 ).
The gas conversion factor stored in the selected filter bank during
a span calibration task will be overwritten by the new gas
conversion factor calculated during the span calibration of the
filter.
Gas to be Used During Span Calibration
The gas you need to use during span calibration must be the gas you
wish to measure with the filter.