30 | NGC8200 AND PGC1000 USER MANUAL | 2101510MNAH
IMPORTANT NOTE: The sample probe pipe coupling should be located on the
but may be mounted vertically or horizontally.
Materials:
¾ inch NPT pipe coupling (previously installed)
Sample probe (configuration to be determined by the technician based on installation and
local codes.)
PTFE tape, like Teflon
®
, or customer-supplied pipe dope (suitable for chromatography)
To install a sample probe:
1. Shut down the meter run and isolate from gas source. Be sure to use proper lockout and
tagging procedures.
2. Bleed off gas from the meter run.
3. Ensure installed mounting coupling is free from dirt and debris.
4. Ensure sample probe threads are free from dirt and debris.
5. Using PTFE tape or pipe dope, wrap or cover NPT threads of sample probe (see Figure 4-8).
Figure 4-8: Sample probe
6. Insert gas probe into pipeline coupling (see Figure 4-9).
7. Using the correct tool, tighten the probe so there is no gas leakage. Do not over-tighten.
8. Install the shut-off valve on the outlet port of the sample probe, if desired.
Figure 4-9: Sample probe insertion
4.4.5 Sample conditioning modules
For some installations, it may be necessary to install an optional sample system conditioning module
to compensate for non-ideal gas samples (see Figure 4-10). These optional modules are engineered to
provide various levels of protection and bypass flows. All sample conditioning modules include a level
of particulate protection and come in two flow sizes: 50 CC and 450 CC per minute (see Table 4-1 for
descriptions).
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