Installing The Sample And Vent Lines - Ametek 241CE II Operator's Manual

3-14 | Model 241CE II Hydrocarbon Dewpoint Analyzer

Installing the Sample and Vent Lines

This procedure assumes the Sample/Vent Lines are supplied by the cus-
tomer (typical). See Figure 3-1 for the locations of the Sample and Vent
Line Connection Fittings on the analyzer.
!
Avoid using cutting oils, greases, thread lubricants, or pipe dopes
because they may contain substances which may contaminate the
CAUTION
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
Assembly except for the propane verification test (see Chapter 5). This
CAUTION
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 Fil-
terblock 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
NOTE
flow through the drain Flow Restrictors in the Filterblock Assembly
may be insufficient to remove all liquid.