ICS Schneider Messtechnik GD-20 Manual página 58

5. Commissioning, operation / 6. Faults
5.5.6 Testing the output signal for model GD-20-A, with field case
The output signal can be measured by connecting an ammeter to terminals 3 and 4 without disconnecting the
measurement circuit.
Model GD-20-A, with field case
UB+/Sig+
EN
+
U
-
0V/Sig-
6. Faults
For contact details see chapter 1 "General information" or the back page of the operating instructions.
In the event of any faults, first check whether the gas density sensor is mounted correctly, mechanically and electrically.
Faults
Gas density value decreases
steadily
No communication via
®
Modbus or current signal
58
A
A
RI ≤ 20Ω
Causes
Leaks in the gas compartment
Electrical connection not correct
Configuration error
Model GD-20-A, with cable outlet
UB+/Sig+
+
U
-
0V/Sig-
A
Measures
Control mechanical mounting of the sensor
Search for leaks with leak detector e.g. model GIR-10
Check wiring and supply voltage
Query via WIKA start-up kit
WIKA operating instructions gas density sensor, model GD-20
BN
GN