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Service Manual
Third edition, June 1997
3.28 Level Unit – IG Press Zero Adjust
Select this window when the IG pressure sensors need to be
adjusted. Select the tank that needs to be adjusted.
Note: When the IG pressure sensor is adjusted for zero pressure it
is very important that the pressure inside the tank is equal to the
pressure outside the tank. The tank must be opened. See also chap-
ter 6.4. Permission from officer in charge must be obtained before
the tank is opened.
Follow the instructions below when calibrating the IG pres-
sure sensor for zero difference in tank pressure and atmo-
spheric pressure.
1. Make sure that the tank or tanks that you intend to
calibrate are open and that there is not a strong wind
affecting the measurement.
2. Check that none of the check boxes for TX Comfail,
Press Sens Fail or Ext Press Alarm are marked for any of
the tanks you intend to adjust.
3. Open the IG Press Zero Adjust-window on the Work
Station.
4. Select the tank you intend to calibrate.
5. Hit the button “Zero adjust this sensor”.
6. Watch new value in the white database box.
7. Hit the Save-button.
8. Continue with another tank from step 1 above or exit
the window.
Note: If you intend to hit the Zero adjust all tanks-button, make
sure that ALL tanks have atmospheric pressure inside. Otherwise
you might ruin a previously correct calibration on some tanks.