GESTRA LRGT 17-1 Installation & Operating Instructions

19
Commissioning procedure
Establishing the measuring range and actual value output
Set the parameters of the conductivity transmitter using the 10-pole code switch on the circuit board.
You can also adjust the cell constant and initiate a function test by changing the code switch settings.
The factory settings are shaded grey in the tables below.
1. Define the measuring range of the conductivity transmitter to suit the admissible conductivity range
of the steam boiler.
2. Set the desired measuring range via the code switch. To change the code switch settings you can use
a ball-point pen, for example.
Code switch
Measuring range
(µS/cm at 25 °C)
Current output mA = µS/cm
1 2 3
4 mA
corresponds to
20 mA
corresponds 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 settings
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
Code switch
Measuring range
(µS/cm at 25 °C)
Current output mA = µS/cm
1 2 3
4 mA
corresponds to
20 mA
corresponds to
OFF OFF OFF
100
3000
100
3000
ON OFF OFF 5000 5000
OFF ON OFF
7000 7000
Factory settings
ON ON OFF 10000 10000
LRGT 16-2
Please check that the conductivity transmitter is wired in accordance with the wiring diagram
Fig. 12, 13 and switch on mains voltage.
For commissioning, open the terminal box by unscrewing the cover screws f and removing the cover
g. The arrow on this cover points to the name plate.
Fig. 1, 9
Switch on mains voltage and open the terminal box

GESTRA LRGT 17-1 Specifications

General

Brand	GESTRA
Model	LRGT 17-1
Category	Controller
Language	English