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8
Maintenance
8 Maintenance
8.1 Cleaning the mini-OPC
The sheath flow filter will become clogged with particles over time. Re-
place annually or whenever the sheath flow control becomes unstable.
If lenses within the unit become dirty, use a Q-tip soaked in IPA to clean
them.
O-rings inside the unit will become dry with use. Apply fresh grease to
the O-rings. Visually inspect the o-rings for damage and replace any that
appear cracked or deformed.
Under persistent high aerosol loading conditions, the sample LFE may
become clogged or partially blocked with particles. Remove the LFE from
the unit and flush with clean DI water and IPA. Sonicate for 2 hours sub-
merged in water. Blow dry with filtered air after sonication and re-install.
Verify that air flows out of the two barb fittings to ensure no blockage of
the differential pressure reading. The sheath flow LFE is protected by a
particle filter and should not require cleaning.
Under persistent high aerosol loading conditions, the sample nozzle may
become clogged or partially blocked with particles. This will be evidenced
by degraded particle counting performance. Remove the nozzle from the
unit and flush with clean DI water and IPA. Sonicate for 2 hours submerged
in water. Blow dry with filtered air after sonication and re-install.
83-00032-01
mini-OPC 9405
Page 37 of 39
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