ProMinent DULCOTROL DWCa, Assembly And Operating Instructions Manual, Page: 66 / 140

13 Commissioning the Compact Controller for Inductive Con‐
ductivity
n
User qualification: trained user, see
Ä
Chapter 2.5 ‘User quali‐
fication’ on page 15
WARNING!
Sensor run in period
This can result in dangerous incorrect metering
Consider the run in period of the sensor during
commissioning:
– Correct measuring and metering is only pos‐
sible if the sensor is working perfectly.
– It is imperative that you adhere to the run in
periods of the sensor.
– Calculate the run in period when planning com‐
missioning.
– It may take a whole working day to run-in the
sensor.
– Observe the sensor operating instructions.
13.1 Measured variables
The controller can process the following measured variables:
n
Inductive conductivity
[ConI]
n
Resistance
[RES]
n
TDS value
[TDS]
n
Salinity
[SAL]
Use the key to switch between the controller's measured varia‐
bles
[ConI], [RES], [TDS] and [SAL] in the continuous display.
Depending on the measured variable set, the settings of variables
are changed or the variables are hidden completely in the
[INPUT
Ø
TCOMP] menu and in the [LIMIT] menu.
Symbol displayed in the controller's display:
[ConI]
Units of measurement: μS/cm, mS/cm , S/cm. The measuring
range is automatically detected and switched by the controller
Physical variable: specific electrical conductivity (K). Only this
measured variable and the correction variable
‘Temperature’ are
emitted at the mA output, independently of the measured variable
set on the controller. The setting of the measured variable on the
controller only affects the layout of the display and not the output at
the mA output.
Symbol displayed in the controller's display:
[RES]
Units of measurement: MΩcm, kΩcm, Ωcm. The measuring range
is automatically detected and switched by the controller
Physical variable: specific electrical resistance.
Calculating the specific resistance: ρ (T
ref
) = 1/K (T
ref
)
Switching between measured varia‐
bles
Measured variable: Inductive conduc‐
tivity
[ConI]
Measured variable: Resistance
[RES]
Commissioning the Compact Controller for Inductive Conductivity
66