VEGA VEGATOR 536 Ex - Manual (Page 14)

14 VEGATOR 536 Ex
Diagnosis
a. Current value < 2 mA
- Check the supply voltage on the connection line to the sensor. The
voltage should be approx. 17 … 20 V.
Should you measure a value below 17 V, then this shows a defect in
the signal conditioning instrument. In this case please send the in-
strument to VEGA for repair.
- Should the red failure lamp continue to light, separate the connection
line from the signal conditioning instrument and connect a resistor of
1 k
Ω
to the sensor inputs of the signal conditioning instrument.
If the failure lamp continues to light, the signal conditioning instrument
is defective. In this case please return the instrument to VEGA for
repair.
- Should the failure lamp extinguish, connect the signal conditioning
instrument again. Separate the sensor from the connection line and
connect a resistor of 1 kOhm instead .
- Should the failure lamp continue to light, the connection line probably
is interrupted. Check the connection line to the sensor.
- When the failure lamp extinguishes, the sensor is defective. Check
the connected sensor.
b.Current value > 22 mA
- Check all connections and the connection line to the sensor.
- Should the red failure lamp continue to light, separate the sensor from
the connection line and connect a resistor of 1 k
Ω
instead.
If the failure lamp extinguishes, the sensor is defective. Check the
connected sensor.
- Should the failure lamp continue to light, connect the sensor again.
Separate the signal conditioning instrument from the connection line
and connect a resistor of 1 k
Ω
to the sensor input instead.
- Should the failure lamp continue to light, the signal conditioning instru-
ment is defective. In this case please send the instrument to VEGA
for repair.
- When the failure lamp extinguishes, there is probably a shortcircuit in
the connection line. Check the connection line to the sensor.
Malfunction during After pressing the test key, the switching conditions are not in the
function test correct sequence or of the correct duration, e.g. a full signal is not
triggered.
- Measure the line resistance
When the line is high-resistance, you have to reduce it to a standard
resistor by appropriate measures. Check for example terminals and
cable connections for corrosion.