Service and maintenance
9.2 Cleaning the optical parts of the sensor
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
161
Cleaning of lens or the process interface window on the sensor side
1.
Use an appropriate tool to release the clamp ring –– and pull the sensor out.
2.
Remove all dust particles using pressurized air or flushing water.
3.
Clean the optical surfaces 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.
When remounting the sensor, make sure that the guide pin fits the hole on the purging
flange. Screw on the lock ring and tighten it gently with the tool.
If this operation is performed properly, it will not affect the alignment of the sensor.
NOTICE
Any work with the optical lens requires utmost care. The lens is anti-reflection coated and
thus very susceptible to scratches!
See also
Mounting (Page 40)