Service and maintenance
9.2 Cleaning the optical parts of the sensor
SITRANS SL
160 Operating Instructions, 12/2010, A5E01132948-04
9.2 Cleaning the optical parts of the sensor
Preparations
WARNING
Danger of burns
Due to hot process gases and/or purging media the sensors and their environment can
become very hot. This applies particularly when steam is used for purging since overheated
steam is not visible!
Before you start cleaning the optical parts of the sensor make sure that
no purging is under way
no hazardous or hot gases can escape from the process
you are sufficiently protected against hot surfaces on and around the sensor, e.g. by
using protective gloves
Failure to do so may result in severe burns!
Cleaning of the process interface window on the process side
1. Demount the process interface, also demount the purging tube if applicable.
WARNING
Dangerous or pressurized process
Before you start demounting the process interface make sure that the process
conditions are safe, e.g. there are no more pressure or dangerous substances on the
process side.
2. Remove all dust particles using pressurized air or flushing water.
3. Clean the optical surface with a soft cloth. Water with a small amount of soap or a mild
detergent also works fine in many cases.
Start the cleaning process at the center and work with circular movements towards the
rim.
4. To remount the process interface, refer to section Installation . Also a new alignment of
the sensors has to be carried out.
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