Installation
2–16 H
2
S in Natural Gas
benders, check tubing fit to ensure proper seating between the
tubing and fittings. Fully ream all tubing ends.
5. Connect the protective gas supply tube to the analyzer using a
stainless steel compression-type male NPT fitting.
6. Tighten all fittings to fitting manufacturer’s specifications. Secure
tubing to appropriate structural supports as required.
7. Check all connections for gas leaks. SpectraSensors recommends
using a liquid leak detector.
Conditioning the Analyzer Tubing
Newly installed systems invariably have some trace contaminants and/or are
intended for measuring trace amounts of gas constituents that tend to cling to
system walls resulting erroneous readings if the constituents are not in
equilibrium with the system walls. Therefore, once the analyzer and sample
conditioning system are completely connected, the entire system (i.e., from
the sample source valve to the vent or return) should be conditioned by flowing
sample gas through the system for up to 12 hours after the system is powered
up and before actual readings are taken. Progress of the system conditioning
can be monitored via the gas concentration readings. Once the gas
constituents have reached equilibrium with the system walls, the readings
should stabilize.
To ensure adequate protective gas flow to the analyzer, all tubing
must be fully reamed. Precautions must be taken to prevent
crimping and other damage to protective gas tubing.
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