Endress+Hauser Universal four-wire Multichannel Controller Field Device CM442-3MQ0/0

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

Warning: Only trained personnel should perform this procedure

New sensor inserted successfully

Sensor data accepted by the transmitter

Used sensor returned to the laboratory

Sensor prepared for reuse in the laboratory

Sign off on the sensor replacement

Warning: This maintenance check requires trained personnel with PPE!

Sensor cleaned using the specified cleaning agent

Sensor inspected for cracks or other damage

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

Sensor regenerated and stored in a regeneration solution if necessary

Sign off on the sensor maintenance

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

Never use concentrated mineral acids or alkaline solutions for cleaning

Never use 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

Sign off on the controller cleaning