LumaSense Technologies 3434i SF6 Leak Detector - Manual (Page 103)

Chapter 9
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BE6028-14 3434i SF6 Leak Detector LumaSense Technologies A/S
Page 103 of 191
Fig.9.1 Schematic diagram showing the structure of the Monitor’s
memory
Before calibrating a particular filter, one of the filter’s banks is made
active (by operating the Monitor in Set-Up mode and “entering” the
chosen filter-bank number for the filter being calibrated). The filter
bank No. which is made active before the filter is calibrated, is the
filter bank where the Monitor will store calibration factors calculated
during calibration. This means that the user is able to calibrate any
particular optical filter to measure up to five different gases.
If a particular filter is to measure more than one gas, it is therefore
necessary to span calibrate it with each of the gases it is to
measure. For example, if you refer to the “Gas Detection Limits”
wall chart you will see that the filter UA 0988 can be used to meas-
ure
1 Sulphur hexafluoride
The filter UA 0988 is installed in position “A” of the filter carousel to
measure the above gas. Before this filter is calibrated, the Monitor
has to be told where to store the calibration factors which are
calculated during the calibration procedure. This is done by selecting
a FILTER BANK NO. – in the active set-up for Filter A each time the