Vega Capacitive electrodes EL 4 … 20 mA - Compact Bedienungsanleitung PDF herunterladen (Seite 40)

40 Capacitive electrodes EL 4 … 20 mA - Compact

22652-EN-020809

Diagnosis

Fault Rectifying measure

Sensor defective, Test the internal connections:

Measurement does • Loosen the 4 screws of the housing cover with a Phillips screw-

react to level driver and remove the housing cover.

changes • Loosen the two small screws with a Phillips screwdriver and pull the

oscillator out of the housing.

• Measure with an ohmmeter (range MOhm) the resistance values

between the following contacts:

- Capacitor

1 M

Screen

Contact 4 and middle pin (1)

The resistance must be 1 MOhm.

If the resistance is less, it indicates moisture in the housing or a defect in

the electrode insulation. A possible reason could be a non-insulated

electrode used in a conductive (moist) medium.

If the resistance is higher or if the connection is interrupted, the reason is

usually a bonding failure in the adapter plate or a defective resistor due

to strong electrostatic discharge.

In both cases, return the electrode to VEGA for repair.

1 2 ... 35 36 37 38 39 40 41 42 43 44

Keine Kommentare

Vega Capacitive electrodes EL 4 … 20 mA - Compact Bedienungsanleitung Seite 40