Calibration Of Zero Point - ProMinent DULCOMETER Assembly And Operating Instructions Manual

Calibrating the controller
Permitted calibration range
The permitted calibration range is
20 ... 300% of the sensor's rated
value.
Example for a shallow slope: Blocking
of the sensor diaphragm leads to a
moderate slope (moderate slope =
low sensor sensitivity)
Example with a steep slope: Surfac‐
tants make the sensor diaphragm
more permeable leading to a steeper
slope (steep slope = high sensor sen‐
sitivity)
9.4.3

Calibration of zero point

Necessity for calibrating the zero
point
Calibration of the zero point is not
generally necessary. A calibration of
the zero point is only necessary if the
sensor is operated at the lower limit of
the measuring range or if the 0.5 ppm
sensor version is used.
86
CAUTION!
Correct sensor operation / Run-in
period
Damage to the product or its sur‐
roundings
– Correct measuring and metering
is only possible if the sensor is
working perfectly
– Please read the operating manual
for the sensor
– Please also read the operating
manuals for the fittings and other
components used
– It is imperative that the run in
periods of the sensors are
adhered to
– The run in periods should be
allowed for when planning com‐
missioning
– It may take a whole working day
to run-in the sensor