Owner manual
Chapter 12
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BE6028-14 3434i SF6 Leak Detector LumaSense Technologies A/S
Page 166 of 191
running there is a positive flow of gas out of the flow meter.
This will ensure that the calibration gas is not diluted by
atmospheric air.
The following text appears on the screen:
RESULTS NOT YET AVAILABLE
PLEASE WAIT
Once the first measurement result is available the screen text
illustrated above is replaced by a screen displaying the
measurement results – for example the following:
W : µ : 5.34 µV σ : 212 nV 3 40.4 °C
PRESS ENTER WHEN RESULTS ARE STABLE
As soon as measurement results are available, they not only
appear on the display (see Fig.12.11) but are automatically
printed out on the printer, if the Monitor has been set up to print
a data log, see section 10.5. Remember to turn off the data log
when the calibration is complete.
Each time a sample of gas is drawn into the analysis cell the
signal is measured using both optical filter “A” and the water-
vapour filter (“W”) but, due to lack of space on the display, the
Monitor only displays the signal measured using the water-vapour
filter. The data-log print-out, however, shows the signal measured
using both the water-vapour filter and filter “A”.
A maximum of 6 measurements are stored in the Monitor during
any calibration. The number (n) indicates how many
measurements are stored. When 7 measurements have been
performed the number (n) will show the number 6 because the
very first measurement is overwritten by the 7
th
measurement so
that only 6 measurements are still stored. When 8 measurements
have been completed the number (n) will also show 6 because the
results of the first and second measurements have been
overwritten by the 7
th
and 8
th
measurement results …and so on.
2. Let the Monitor continue measuring the span gas A until the
temperature is stable. Look at the print-put of the average and
standard deviation measurements for (1) the water-vapour and
(2) the filter “A”. When these values have stabilised for both
filters, span calibration measurements do not need to continue.
3. Press
↵
.
This causes the following text to appear on the screen: