Measured Variable Ph [Ma]; Orp [Mv], Orp [Ma] - ProMinent DULCOMETER Assembly And Operating Instructions Manual

8.1.3

Measured variable pH [mA]

Measured variable pH [mA]:
If the measured variable
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:
4 mA = 15.45 pH
n
20 mA = -1.45 pH
n
With a pH-V1 measuring transducer, the
setting of the measuring range allocation
is automatically specified.
'pH [mA]' , i.e.
Setting measured variables
Temperature compensation
This function is used to compensate for
the temperature influence on the meas‐
urement. The process temperature is set
in the DMTa measuring transducer when
using a DMTa measuring transducer
Temperature: [Off] / [Manual] / [Automatic]
[Off] switches the process tempera‐
n
ture setting off
[Manual] permits manual process
n
temperature setting
[Automatic] uses a measured process
n
temperature
8.1.4

ORP [mV], ORP [mA]

Measured variables ORP [mV], ORP [mA]
If the measured variable
'ORP [mA]' is selected, measurement of
the process temperature is only possible
for information or recording purposes.
For the measured variable
the measuring range is fixed in the range
-1500 mV ... + 1500 mV.
For the measured variable
the measuring range is dependent on the
RH-V1 measuring transducer and is 0 ...
+1000 mV.
' ORP [mV]' or
'ORP [mV]' ,
'ORP [mA]' ,
55