Analytical Industries GPR-1500 A Series Trace PPM Oxygen Analyzer - Manual (Page 51)

Advanced Instruments, Inc
51
The filter element screws into the head section, carefully turn it counter clockwise and remove it from the
head.
Using the damp cloth, clean the inside of the bowl and the o-ring before reassembling – apply a very thin
coat of lubricant to the o-ring.
Reverse the above steps to re-assemble the filter.