Honeywell CM4, Technical Handbook

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CM4 Four-Point Continuous Monitor
CM4 Technical Manual 9-8
9.3 Filter Maintenance
The CM4 utilizes filters to protect the unit from dust particles and potentially damaging gases. Table 9-2 provides maintenance information
about filters. Figure 9-6 shows the relative positions of the various filters. See Section 3.7 for information on external sample line filters.
Name of Filter Location Part Number
Replacement
Frequency
Notes
Acid Scrubber Filter
Under Chemcassette
®
carrier
See Figure 9-6
710235 6 Months
Replace the filter if the filter media (all or any) part turns
blue or sample flowrate cannot be achieved
Particulate Filters
Inside analyzer under Chemcassette
®
carrier
See Figure 9-6
780248 3 to 6 Months
Charcoal Freon Filters
(CM4-P only)
Inside analyzer under Chemcassette
®
carrier
See Figure 9-6
1874-0139 1 Month
External Sample Line
Particulate Filter
End of sample line
(if installed)
Gas specific - See Section 3.7 and Appendix A
Teflon Filter Housing
Assembly
End of sample line
(if installed)
1830-0055
(filter ass’y)
1 Month
Use filter membrane P/N 0235-1072 (100 per pack) or
replacement in filter housing
Table 9-2: Filter Replacement Schedule
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