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SEBA HYDROMETRIE, user manual
that also the remaining water drops will be removed from the supply tube of the pressure sensor. After
confirmation a window opens, in which the actual zero point of the water level value continuously will be
indicated. If the indication is stable, the status will be stored with “ok”. The so received values will be
taken for the zero point correction of the sensor. At last insert the required hanging depth as rated value
in the window “offset”-calibration. As a result the parameter will automatically be calculated, that after
installation of the probe the negative tapping value arises. By installation in the field, the probe will be
lowered as far as the requested tapping value has been arrived, which before had been measured with
an electric contact meter.
2.8.2.3.3 Water level above normal zero or other reference point
The sensor will be adjusted, that the outputted water level corresponds to the height of the water level
above normal zero or another reference height.
zero-point, for example top of well
700m above sea level
tapping water level, (for example 20m)
a) entry sebaterm 680m (probe installed)
water level
displayed
value 680m
depth of MPS-D
(for example 30m)
b) entry sebaterm 670m
(probe not installed)
installation position
probe 670m above s.l.
pic: 2.8.2.3.3
It’s different, whether the probe is in installation position or not. The installed probe would be the ideal
status for an automatic set up. Nevertheless this is only possible if the connection cable of the probe
ends freely at the top and therefore can be connected to the PC-adapter for set up in installed condition.
a) Probe is in installation position
For set up o the pressure measurement, the water level above normal zero must be known, resp. must
be measured and has to be inserted into the window “offset-calibration”. After confirmation with "OK" the
new values will be transferred to the probe. For control purposes the water level above normal zero will
be indicated.
b) Probe is not installed
The probe has to be held in vertical position outside the medium. We recommend to shake slightly, so
that also the remaining water drops will be removed from the supply tube of the pressure sensor. After
confirmation a window opens, in which the actual zero point of the water level value continuously will be
displayed. If the indication is stable, the status will be stored with “ok”. The so received values will be
taken for the zero point correction of the sensor. At last insert the zero point above normal zero or any
other reference of the intended probe position height in [m] unit as rated value in the window “offset-
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