22
Basic Settings
Establishing measuring range and actual value output
Factory setting
The conductivity transmitter features the following factory set default values:
LRGT 16-1, LRGT 17-1
Measuring range:
0.5 µS/cm to 500 µS/cm (at 25°C)
preferred measuring range
Temperature coefficient: 2.1 (% / °C)
LRGT 16-2
Measuring range:
100 µS/cm to 7000 µS/cm (at 25°C)
Temperature coefficient: 2.1 (% / °C)
To set the parameter of the conductivity transmitter, open the housing and use the 10-pole code switch
on the circuit board. The code switch can also be used for adapting the cell constant and initiating a
functional test. In the following tables, the factory settings are highlighted in grey.
1. Establish the measuring range (control range) of the conductivity transmitter on the basis of the
conductivity range of the steam boiler.
2. Set the desired measuring range via code switch. You can use a ball-point pen to set the code
switch.
When the supply voltage is applied (during commissioning) the first output will be 4 mA, then the output
current increases until it reaches the actual value.
Code switch
Measuring range
(µS/cm at 25 °C)
Current output mA = µS/cm
1
2
3
4 mA is
equivalent to
20 mA is
equivalent to
OFF
OFF
OFF
0.5
20
0.5
20
ON
OFF
OFF
100
100
OFF
ON
OFF
200
200
ON
ON
OFF
500
500
Factory setting
OFF
OFF
ON
1000
1000
ON
OFF
ON
2000
2000
OFF
ON
ON
6000
6000
ON
ON
ON
12000
12000
LRGT 16-1, LRGT 17-1