PN 903-8797, Rev A
Installing the Sample and Vent Lines
This procedure assumes the Sample/Vent Lines are supplied by the customer
(typical). See Figure 2-1 for the locations of the Sample and Vent Line Connec-
tion Fittings on the analyzer.
Avoid using cutting oils, greases, thread lubricants, or pipe dopes
because they may contain substances which may contaminate the
Sample Lines and interfere with the operation of the analyzer. Also,
before connecting the Sample Line to the analyzer, “blow down” the
Sample Line to clear it of any debris or moisture that may have accu-
mulated inside it during manufacturing, shipping, or storage.
To install the Sample and Vent Lines:
1. Using 1/4" 316 stainless steel tubing, run the Sample Line tubing from the
Sample Probe (on pipeline) to the analyzer. If the Sample/Vent Lines are
electrically heat traced, the tubing must be approved by the local authority
for use in the hazardous location.
Do not remove the 1 PSIG check valve installed on the Filterblock As-
sembly except for the propane verication test (see Chapter 6). This
check valve is used to prevent damage to the Membrane Filters that
can be caused by unstable process pressure, such as sudden pressure
drops or back pressure, which can rupture the membranes.
2. Connect the tubing to the Sample Line Connection Fitting on the Filter-
block Assembly.
When operating at very low pressures below 20 BAR (300 PSIG) and
with large quantities of liquid droplets present in the gas stream, the
ow through the drain Flow Restrictors in the Filterblock Assembly
may be insucient to remove all liquid.
2-14 | 241CE II Hydrocarbon Dewpoint Analyzer
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