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This handling can cause an important move of the ruler, two
problems may occur:
• There is not enough liquid in the receiver, in this case : add some liquid (see step 1).
Screw the pressure connection and wait 2 to 3 minutes, then repeat the procedure to
set the zero as described hereabove.
• There is too much liquid, in this case : take an empty burette, squeeze it and suck up
the liquid excess. Screw the pressure connection and wait 2 to 3 minutes then repeat
the procedure to set the zero as described hereabove.
3
Connection of the liquid column manometer
Connect the manometer with a Ø 5 x 8 mm crystal tube to the source of
pressure or depression to check:
• For a pressure measurement: connect the crystal tube on the left connection (+).
• For a depression measurement: connect the crystal tube on the right connection (-).
• For a differential pressure: Connect on the left connection (+) the highest pressure
and on the right connection (-) the lowest pressure.
If you need pass through a wall to make some pressure measurements, it is
advised to use glanded penetrations in order to avoid a premature wear of
the silicone tubes (there are different lengths available).
4
Calibration of a manometer
• Compare the results of the pressure generator and of the manometer. If the manometer
has a different value from the value of the pressure generator, adjust the manometer
with the setting screw of the level until getting the same value.
Example:
If the generator shows 4.8 mmH
unscrew the setting screw of the level until getting the same value (the bubble of the
spirit level must be between the two lines. See step 1).
If the generator shows 5 mmH
screw back on the setting screw of the level until getting the same value (the bubble of
the spirit level must be between the two lines. See step 1).
• Redo the zero point of the manometer and wait for the stabilization of the
liquid (2 to 3 minutes).
5
Maintenance
The manometers do require no particular maintenance. Nevertheless, we recommend to
change the manometer liquid once or twice a year.
Ihr Schweizer Industriepartner
• With a pressure generator, generate a determined
pressure.
• Wait 2 to 3 minutes the stabilization of the
measurement.
O and the manometer 5 mmH
2
O and the manometer 4.8 mmH
2
info@digiparts.ch
www.digiparts.ch
O: in this case, slightly
2
O: in this case slightly
2
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