wtw CL 298, Operating Manual

Page: 28 / 76

Operation
pH 298, LF 298, Oxi 298, Cl 298
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ba77196e03 07/2018
4.2 Measured value and status display
Measured
parameters
In addition to the main measured parameter (e.g. pH value, conductivity etc.),
the measuring transmitter has secondary parameters, which are derived or
calculated from the main measured parameter, and the temperature of the test
sample.
The measured parameters can be used for feedback control via the relay and
current outputs.
figure 4-2 Measured value and status display (example: pH)
1 Status display HOL (Hold):
The measured value is frozen
(also for relays, current outputs and Modbus)
2 measured value
3 2nd value
4 Status relay 1
(in the example: closed)
5 Status relay 2
(in the example: open)
6 Status output 1
(
actual value, in the example 4.90 mA)
7 Status output 2
(
actual value, in the example 5.00 mA)
8 temperature
9 Status display CAL:
Calibration values outside the allowed limits
10
Status display Fix:
fixed temp. active
10
8
1
2
1
3
4
5
9
7
6
Main measured value Secondary measured
value Temperature
pH 298 (pH) pH value Electrode voltage in mV temperature in °C