6-12 | Model 241CE II Hydrocarbon Dewpoint Analyzer
“P/N” refers to Part Number.
To clean the Measuring Cell and replace its o-ring (Figure 6-1):
1. Bleed down the sample system. To do this, close the isolation valve on
the Sample Probe or at the Sample Inlet valve. Open the Bypass Valve
and allow the gas pressure in the sample system and Measuring Cell
to depressurize for approximately 5 minutes.
Never bleed down the sample system pressure from the sample inlet
side of the Filterblock Assembly. Pressure differentials of more than
210 KPA (30 PSI) in this direction can tear the Membrane Filters.
To decrease the bleed-down time, stop the normal measuring cycle
by changing the MTLo setting to 0.5 degree below the MTHi setting.
(Record the original value for future reference when returning it to its
original setting.) When exiting this menu, do not save the configura-
tion to the onboard EEPROM – this is a temporary condition only.
Change the purging time (Purge) to 20 minutes or greater. (Record
the original value for future reference when returning it to its original
setting.) When exiting this menu, do not save the configuration to the
onboard EEPROM – this is a temporary condition only.
2. After the sample system has depressurized, disconnect main AC pow-
er to the analyzer by opening the power-disconnect switch (external
to the analyzer).
3. Using two wrenches – to avoid disturbing the connection fittings –
disconnect the tubing fittings on the bottom of the Measuring Cell.
4. Disassemble the Measuring Cell for cleaning.
• If it is convenient and practical to do so, the Measuring Cell may
be cleaned without removing the entire Heatsink/Measuring Cell
Assembly from the Electronics Enclosure. If this can be done, con-
tinue with Step 5.
Do not separate the Heatsink from the Cooler Housing unless it is
necessary to inspect the Peltier Cooler or RTD in the Cooler Housing,
and only if instructed to do so by your AMETEK representative.
!
CAUTION
RUN Mode
ApplicCFGMTLo
RUN Mode
ApplicCFGPurge
!
CAUTION
NOTE
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