ProMinent DULCOMETER - Page 171

Measured variable pH [mA]:
If the measured variable ‘pH [mA]’ , i.e.
pH measurement using a mA signal, is
selected, then the possibility of sensor
monitoring for cable or glass breaks is no
longer available.
For a pH measurement using a mA signal,
either a DMTa or a pH-V1 measuring
transducer is connected to the pH sensor.
A 2-conductor connection cable is used
between the DMTa-/pH-V1 measuring
transducer and the controller. The con‐
nection cable supplies the DMTa-/pH-V1
measuring transducer and routes the
measured value as a 4 ... 20 mA signal to
the controller.
When using the DMTa measuring trans‐
ducer or the measuring transducer of
another supplier, the measuring range
allocation must be set to the following
values:
n 4 mA = 15.45 pH
n 20 mA = -1.45 pH
With a pH-V1 measuring transducer, the
setting of the measuring range allocation
is automatically specified.
Measured variables ORP [mV], ORP [mA]
If the measured variable ‘ ORP [mV]’ or
‘ORP [mA]’ is selected, measurement of
the process temperature is only possible
for information or recording purposes.
For the measured variable
‘ORP [mV]’ ,
the measuring range is fixed in the range
-1500 mV ... + 1500 mV.
For the measured variable
‘ORP [mA]’ ,
the measuring range is dependent on the
RH-V1 measuring transducer and is 0 ...
+1000 mV.
Measured variable temperature [mA], (as
main measured variable):
For the measured variable ‘Temperature
[mA]’ use of a DMTa temperature meas‐
uring transducer or a Pt100V1 measuring
transducer is prerequisite. The measuring
range is: 0 ... 100 °C. A temperature
sensor cannot be connected directly to the
controller.
Measured variable temperature [Pt100X],
(as main measured variable)
The temperature sensor Pt100 or Pt1000
can be directly connected to the measure‐
ment input of the controller. The meas‐
uring range is: 0 ... 150 °C
Temperature measurement for the meas‐
ured variable ORP
If the measured variable ORP [mV] or
ORP [mA] is selected, measurement of
the process temperature is only possible
for information or recording purposes. For
the measured variable ORP [mV], the
measuring range is fixed in the range
- 1500 mV ... + 1500 mV. For the meas‐
ured variable ORP [mA], the measuring
range is dependent on the
RH-V1 measuring transducer and is
0 ...+ 1000 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 trans‐
mitted to the controller. This measurement
can be used if the cable is less than 10
metres in length.
Glossary
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