61
8015383/ZUQ7/V1-3/2020-06 | SICK
O P E R A T I N G I N S T R U C T I O N S | TRANSIC151LP
Subject to change without notice
MAINTENANCE
7
7.1.5
Cleaning the filter
Cleaning the stainless steel mesh filter
1
Remove the filter from the TRANSIC151LP.
2
Clean the filter.
3
Dry the filter thoroughly.
4
Ensure air can flow through the filter mesh.
5
Refit the filter.
The stainless steel filter needs to be replaced when it remains dirty or clogged despite
thorough cleaning. Part No.,
see “Spare parts and accessories”, page 62
PTFE filters
The PTFE filter protects the optical components against liquids and dust. It is permeable to
water vapor and solvents.
Checking the PTFE filter
The PTFE filter needs to be checked and exchanged regularly to provide adequate gas flow
to the sensor volume.
Exchanging the PTFE:
1
The PTFE filter is retained by an O-ring on the base of the transmitter probe. Grasp the
filter firmly, slide it over the O-ring and pull the filter out. Only grip the filter as described
above. Remove the used O-ring seal.
2
Replace the O-ring seal with a new one: Roll the seal carefully into the groove at the base
of the oxygen measuring probe. Be careful not to damage the O-ring by excessive sliding
or friction along the metal edges of the probe.
3
If the open filter end is to be lubricated to ease installation, only use inert, oxygen-
compatible lubricants suitable for seals and the process, such as, for example, DuPont
Krytox
®
. Slide and lock the filter into place by holding the filter only by the solid part at
the open end of the filter or (if necessary) by pressing at the closed tip of the filter with
your fingers.
NOTE:
Never touch the PTFE filter surfaces
▸
Only touch the PTFE filter as marked in Figure
“Stainless steel mesh and PTFE fil-
. Avoid touching, rubbing or scraping the active surfaces of the PTFE
filter as this can clog the filter.
