Endress+Hauser Universal four-wire Multichannel Controller Field Device CM444-CMQ1/0

Note: The sensor data are automatically accepted by the transmitter. A release code is not required

Used sensor returned to the laboratory

Sensor prepared for reuse in the laboratory

Sign off on the sensor replacement

Warning: Use the cleaning agent specified in the sensor manual

Sensor inspected for cracks or other damage

Any damage found on the sensor?

If damage is found, report to the maintenance team and stop the procedure

Sign off on the sensor maintenance

Warning: Use commercially available cleaning agents only for cleaning the front of the housing.

Select the cleaning agents used

Never use concentrated mineral acids, alkaline solutions, organic cleaners such as acetone, benzyl alcohol, methanol, methylene chloride, xylene or concentrated glycerol cleaner.

Never use high-pressure steam for cleaning purposes.

Is a cleaning system connected?

If a cleaning system is connected, switch it off before removing a sensor from the medium.

If you wish to check the cleaning function and have therefore not switched off the cleaning system, please wear protective clothing, goggles and gloves or take other appropriate measures.

Cleaning completed successfully?

Sign off on the controller cleaning

Warning: Avoid hazards posed by pressure, temperature and contamination

Has the sensor been de-energized before opening?

Have all circuits been de-energized before working on the terminals?

Warning: Take personal protective measures to avoid ESD

Have you discharged at PE or grounded with a wrist strap?

Are you using genuine spare parts?

Function, accuracy and reliability ensured after maintenance work?

Sign off on the controller calibration