17 Maintenance
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Process fluid will escape from the process connection!
Hazard depending on the property of the process medium!
Tighten the pressure screw to a torque of maximum 10Nm.
17.3 Cleaning the measuring windows
The opacity / absorption is measured using two measuring
windows (sapphire) in the process. Contaminations or coatings will
corrupt the measured value.
Clean the measuring windows from coatings at regular
intervals.
Remove the sensor from the process connection.
Clean the measuring windows from coatings.
Risk of injuries due to escaping process fluid!
Please wear safety goggles and protective clothing!
Check whether tanks or pipelines the sensor is connected to
are depressurised, empty, and clean!
Measuring window
Fig. 5: Measuring window on the sensor
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