Maintenance
Liquisys M CLM223/253
84
Hauser
8.1.4
Simulation of inductive sensors for device test
The inductive sensor cannot be simulated.
However, the overall system comprising the transmitter and inductive sensor can be checked
using equivalent resistances. Note the cell constant (k
nominal
= 1.98 cm
-1
for CLS50, k
nominal
= 5.9 cm
-1
for CLS52, k
nominal
= 6.3 cm
-1
for CLS54).
For an accurate simulation, the actual cell constant (can be read in field C124) is to be used
to calculate the display value.
The exact formula depends on the sensor type:
CLS50 and CLS52:
Display conductivity [mS/cm] = k(cm
-1
)
1/R [k
]
CLS54:
Display conductivity [mS/cm] = k(cm
-1
)
1/R [k
]
1.21
Values for simulation with CLS50 at 25 °C (77 °F):
Values for simulation with CLS54 at 25 °C (77 °F):
Conductivity simulation:
Pull a cable through the sensor opening and then connect, e.g. to a decade resistor.
Simulation resistance R
Default cell constant k
Conductivity display
2
1.98 cm
-1
990 mS/cm
10
1.98 cm
-1
198 mS/cm
100
1.98 cm
-1
19.8 mS/cm
1 k
1.98 cm
-1
1.98 mS/cm
Simulation resistance R
Default cell constant k
Conductivity display
10
6.3 cm
-1
520 mS/cm
26
6.3 cm
-1
200 mS/cm
100
6.3 cm
-1
52 mS/cm
260
6.3 cm
-1
20 mS/cm
2.6 k
6.3 cm
-1
2 mS/cm
26 k
6.3 cm
-1
200
μ
S/cm
52 k
6.3 cm
-1
100
μ
S/cm
Summary of Contents for Liquisys M CLM223/253
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