64171, Rev. 10/May 2019
3M™ GMI™ PS200 PORTABLE GAS MONITOR
OPERATOR MAINTENANCE
8-1
8. OPERATOR MAINTENANCE
8.1. Cleaning
Clean the outer casing of the monitor using a non-abrasive moist cloth. Use a mild soap solution with
a non-abrasive cloth to remove stubborn marks.
8.2. Replace Filters
The monitor has 2 filters:
• hydrophobic (water) filter - located behind the filter cover on the front face of the monitor;
• sample inlet (dust) filter - located in the sample inlet connector at the bottom of the monitor.
Inspect these filters periodically for contamination or damage.
8.2.1. HYDROPHOBIC (WATER) FILTER REPLACEMENT
Figure 8-1: Hydrophobic Filter Replacement
• Using a No. 1 Pozidrive
®
screwdriver, unscrew the captive screw.
• Slide the filter cover away from the display until the locating lugs disengage from the locating
slots.
• Lift the filter cover away from the monitor.
• Remove the hydrophobic filter.
• Insert a new hydrophobic filter.
CAUTION: Do not use polishes that contain silicon or solvent to clean the monitor as
these may damage any flammable gas sensor fitted. Do not use abrasive
chemicals or strong, volatile chemical solutions as these could damage the
casing.
