LumaSense Technologies INNOVA 1412i User Manual
Page 155
Chapter 12
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BE6025-15
1412i Photoacoustic Gas Monitor
LumaSense Technologies A/S
Page 155 of 202
Use the Set-up Tree in
to help you navigate through the
different screen displays.
Note: before starting a calibration, S.I.T (see
) and
) need to be set so that they are the
same as those values used when monitoring.
1. For each installed filter, enter the no. of the filter bank where you
wish the Monitor to store the concentration offset factors
which will be calculated during the zero-point calibration task.
2. Press MEASURE S3 S3 S1. The following text will be
displayed:
PERFORM ZERO-POINT CALIBRATION ?
NO YES
3. Follow the set-up of a zero-point calibration task by following the
black arrows in the schematic diagram shown in
The following text will appear on the display:
ZERO-POINT CALIB. CONNECT CLEAN, DRY AIR
AND PRESS ENTER WHEN READY
12.6.2 Performing a Zero-point Calibration – Stand-alone
Use
The general equipment necessary to perform a calibration task is
described in
. Follow the procedure from step 1 to step 3
inclusive and then continue as follows:
1.
a. Connect the free-end of the teflon tubing mentioned in step 3
to the pressure valve on a cylinder of zero gas (e.g. pure
nitrogen).
b. Gently open the pressure-valve on the gas cylinder.
c. Press
¿
.
d. Use the pressure-valve on the gas cylinder to regulate the flow
of gas so that when the Monitor’s pump is running there is a
positive flow of gas out of the flow meter. This will ensure that
the zero gas is not contaminated by atmospheric air.
The following text appears on the screen: