Maintenance Liquistation CSF48
230 Endress+Hauser
12.4.5 Digital sensors
The cleaning system is not switched off during calibration or maintenance activities
Risk of injury due to medium or cleaning agent
‣ If a cleaning system is connected, switch it off before removing a sensor from the medium.
‣ If you are not switching off the cleaning system because you wish to test the cleaning
function, wear protective clothing, goggles and gloves or take other appropriate measures.
1. If an error occurs or the maintenance schedule stipulates that the sensor has to be
replaced, use a new sensor, or a sensor that has been precalibrated in the laboratory.
A sensor is calibrated in the laboratory under optimum external conditions, thereby
ensuring better quality of measurement.
2. Remove the sensor to be serviced and install the new sensor.
3. You must perform calibration if you use a sensor that is not precalibrated.
4. The sensor data are automatically accepted by the transmitter. A release code is not
required.
5. Measurement is resumed.
6. Take the used sensor back to the laboratory. In the laboratory you can get the sensor ready
for reuse while ensuring the availability of the measuring point.
– Clean the sensor. For this purpose, use the cleaning agent specified in the sensor
manual.
– Inspect the sensor for cracks or other damage.
– If no damage is found, regenerate the sensor. Where necessary, store the sensor in a
regeneration solution (--> sensor manual).
– Recalibrate the sensor for reuse.
12.4.6 Assemblies
Refer to the assembly operating manual for information on servicing and troubleshooting the
assembly. The assembly operating manual describes the procedure for mounting and
disassembling the assembly, replacing the sensors and seals, and contains information on the
material resistance properties, as well as on spare parts and accessories.
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