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14 Maintenance / cleaning / change of medium
When removing or installing the unit for maintenance and cleaning:
►
Make sure that the stainless steel tube clip is fixed to the sensor.
> It must be possible to exactly reproduce the installation height and position!
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Remove the sensor and clean it / carry out maintenance
►
Install sensor exactly in the same position as before.
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Otherwise check the parameter [OP] and carry out [cOP] once again.
14.1 Maintenance information for operation without overflow
prevention
[MEdI] = [Auto] or
[MEdI] = [C...] or [O...] and [OP] = [OFF]
The unit must be reinitialised in the following cases (switch the operating voltage
briefly off and on again):
• after all maintenance operations
• after cleaning operations (e.g. water jet cleaning of the sensor probe)
• if the sensor was removed from the tank and then installed again during
operation.
• if the active zone of the sensor was touched with the hand or grounded objects
(e.g. a screwdriver, a cleaning lance).
• If the connection between the sensor and the tank wall / counter-electrode was
changed.
• after a change of the medium with considerably differing dielectric constants
For manual selection of media, first the [MEdI] setting needs to be adjusted.
