VEGA VEGATOR 521, 522, 523, 527 - Manual (Page 22)

22 VEGATOR
Diagnostics
5.3 Failure rectification
Failure Rectification / Measure
Instrument is dead /
Green operating
control lamp
extinguishes
Check the voltage supply and the mains connections as described
under “Connection instructions“ on page 8. If the instrument still
does not function, please call our service department.
Red failure LED
lights
Check the sensor inputs for the following failures:
- short circuit on the input
- sensor not connected correctly or polarity-reversed
- sensor line interrupted
- supply voltage too low
Check if the sensor is connected correctly
- failures in the sensor, effecting a current change to below 2 mA or
above 23 mA, generate a fault signal on VEGATOR.
Measure the current in
the connection cable to
the sensor.
For Ex systems, make sure that the Ex protection is not de-
graded by the measuring instruments.
28
30
32
+
-
+
±
+
-
mA V
4 … 20 mA 12 … 20 V
VEGATOR
Sensor