VEGA VEGATOR 537 Ex - Manual (Page 15)

VEGATOR 537 Ex 15
23465-EN-030723
Diagnosis
a. Current value < 2 mA
- Check the voltage supply on the connection cable to the sensor. The
voltage should be approx. 17 … 20 V.
If you measure a value below 17 V, it indicates a defect in the signal
conditioning instrument. In this case, send the instrument for repair to
VEGA.
- If the red fault signal lamp continues to light, separate the connection
cable from the signal conditioning instrument and connect a resist-
ance of 1 k
Ω
to the sensor inputs of the signal conditioning instru-
ment.
If the fault signal lamp continues to light, the signal conditioning in-
strument is defective. In this case, send the instrument for repair to
VEGA.
- If the fault signal lamp extinguishes, reconnect the signal conditioning
instrument. Separate the sensor from the connection cable and con-
nect instead a resistance of 1 kOhm.
- If the fault signal lamp continues to light, the connection cable is prob-
ably interrupted. Check the connection cable to the sensor.
- If the fault signal lamp extinguishes, the sensor is defective. Check
the connected sensor.
b.Current value > 22 mA
- Check all connections and the connection cable to the sensor.
- If the red fault signal lamp continues to light, separate the sensor
from the connection cable and connect instead a resistance of 1 k
Ω
.
If the fault signal lamp extinguishes, the sensor is defective. Check
the connected sensor.
- If the fault signal lamp continues to light, reconnect the sensor. Sepa-
rate the signal conditioning instrument from the connection cable and
connect a resistance of 1 k
Ω
to the sensor input.
- If the fault signal lamp continues to light, the signal conditioning in-
strument is defective. In this case, send the instrument for repair to
VEGA.
- If the fault signal lamp extinguishes, there is probably a short-circuit
in the connection cable. Check the connection cable to the sensor.
Malfunction After pushing the test key, the switching status does not appear in
during function test the correct sequence or in the correct duration, e.g. no full signal is
triggered.
- Measure the line resistance
If the connecting line has acquired excessive resistance, you must
reduce its resistance to a normal level through appropriate meas-
ures. Check, e.g. the terminal and cable connections for corrosion.