Information On The Measured Variables; Measured Variable Ph [Mv]; Temperature - ProMinent DULCOMETER diaLog DACb Assembly And Operating Instruction

If you carry out the pH value measurement using potential equalisation, then you must adopt
this approach when selecting the measured variable as a parameter.
9.1 Information on the measured
variables
Available measured variables
All measured variables are available
and can be used in the controller.
9.1.1

Measured variable pH [mV]

The measured variable pH [mV]
The pH sensor of the measured variable pH
[mV] is connected using a coaxial cable via
which the mV signal is transmitted to the con‐
troller. This measurement can be used if the
cable is less than 10 metres in length.
Decimal places
The function shows the pH value in the display
with one or two decimal places. An adaptation
of the display to one decimal place makes
sense if a change in the 1/100 value is unim‐
portant or if the value is unsteady.
Factory setting: 2 decimal places
Configuring measured variables
Glass break detection
[ON] / [OFF] : Switches glass break detection of
[ON] or [OFF] . The factory set‐
the pH sensor
[OFF] . If the controller has the setting
ting is
[ON] , it displays an error message if an error is
detected.
[Glass break detection] increases
The function
the safety of the measuring point.
Cable break detection
[ON] / [OFF] : Switches cable break detection
[ON] or [OFF] . The factory
of the coaxial cable
[OFF] . If the controller has the setting
setting is
[ON] , it displays an alarm message if an error is
detected.
[Cable break detection] increases
The function
the safety of the measuring point.
9.1.2

Temperature

Temperature
With amperometric measured variables, the
temperature influence on the measurement is
automatically compensated in the sensor. A
separate temperature measurement is only
used, if necessary, to display and issue the
temperature values via an mA-output. Separate
temperature compensation is only needed with
a chlorine dioxide sensor type CDP.
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