PN 903-8797, Rev A
Measuring Cell Maintenance
See Figure 4-1 while disassembling the Measuring Cell to clean it and/or re-
place its o-ring.
Clean the Measuring Cell:
• If one or more of the following Status Codes (SCodes) are displayed:
- w Dirty Cell (SCode 16)
- f H2O Optics (SCode 32)
- f HC Optics (SCode 64)
• If there is evidence of baseline deviations.
• If the HCDPA O-Spec Alarm is present. The HCDPA O-Spec Alarm is trig-
gered if the HCDP temperature is unacceptably high or low.
• If, at the beginning of the Purging/Hold Stage, one or both of the photo-
transistor signals is signicantly higher or lower than normal when com-
pared to the analyzer at the same surrounding ambient temperature.
• If there is evidence of contamination to the Membrane Filters in the Filter-
block Assembly (i.e., if liquids, oils, or waxes are found while the Filterblock
Assembly is being cleaned).
Replace the Measuring Cell o-ring:
• If the o-ring is found to be damaged (nicks, cuts, scratches) while cleaning
the Measuring Cell.
RUN Mode
Stat\HistorySCode
See “Spare Part Lists”
in this chapter for ordering
numbers.
4-14 | 241CE II Hydrocarbon Dewpoint Analyzer
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