Operating Manual ILM-4
31
15
Repair and maintenance
The conductivity sensor described here is maintenance-free. However, if it should become nec-
essary to calibrate the sensor, the offset (zero point) and the span of the sensor can be set with
MPI-Tool (Calibration mode) or using IO-Link.
For this purpose, navigate to the following window via the user interface (for example, for con-
ductivity 1):
"Conductivity Measurement
→
Conductivity 1
→
Offset Conductivity 1"
(for off-
set) or
"Conductivity Measurement
→
Conductivity 1
→
Slope Conductivity"
(for span).
For the offset, the set value is added to the calibrated conductivity value set at the factory. For
the span, the set factor is multiplied with the calibrated conductivity value set at the factory.
This method can also be applied to concentration, conductivity 2 and temperature (offset only).
The adjustable ranges are:
-
Offset conductivity: half of the set measurement range, e.g. -
50…50
mS / cm in measure-
ment range 0…200
mS / cm
-
Slope Conductivity: 75 %...125 %.
The setting can also be made via the Simple User Interface directly on the sensor using the ID
codes 013071 for the zero-point conductivity and 013081 for the conductivity slope.
We recommend always using a reference solution and a reference device for calibration.
16
Technical data
Submersion length
Product-contacting
L20: 20 mm
L50: 50 mm
Measurement range
The measurement range is
freely adjustable
0…0.5
mS/cm to 0…1000
mS/cm in
0.5 steps
Process connection
Thread
Tri-Clamp
Varivent
CLEANadapt G1"
Tri-Clamp 1.5", 2", 2.5", 3"
DN 25 (type F) DN 40/50 (type N)
Process pressure
Max. 16 bar
Tightening torque
20 Nm (CLEANadapt system)
Materials
Connecting head
Threaded connector
Submersible body
Plastic cover/sight glass
Stainless steel 1.4308
Stainless steel 1.4305
PEEK (FDA number:
21 CFR 177 2415)
Polycarbonate
Temperature ranges
Ambient
Process
CIP/SIP
-
10…70
°C
-
10…130
°C
150 °C max. 60 min
Reproducibility
of conductivity
< 1% of measurement value
