Endress+Hauser Universal four-wire Multichannel Controller Field Device CM444-EF41/0

Warning: Avoid hazards posed by pressure, temperature and contamination

Has the device been de-energized before opening?

Warning: De-energize circuits before working on the terminals

Have personal protective measures been taken to avoid ESD?

Are you using genuine spare parts?

Sign off on the controller calibration

Clean the sensor using the specified cleaning agent

Inspect the sensor for cracks or other damage

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

Regenerate the sensor and store in a regeneration solution if necessary

Recalibrate the sensor for reuse

Sign off on the sensor maintenance

Remove the sensor that requires maintenance

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

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

Sign off on the sensor replacement

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

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

Did you use high-pressure steam for cleaning?

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

Is the cleaning system switched off?

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.

Did you wear protective clothing, goggles and gloves?

Sign off on the controller cleaning