48 | IPS-4 Zone1/Analyzer
Sample System Leak Check
The analyzer sample system has been pressure-checked for leaks at the
factory as part of AMETEK’s quality assurance procedures.
However, fittings can loosen during transport. Also, the Sample, Vent,
Instrument Air (or N
2
), and Calibration (Span, if used) Fluid lines are in-
stalled on-site. Therefore, it is important that a leak check is performed on
the entire sample system prior to commissioning the analyzer for opera-
tion for the first time, or following the replacement of any lines/fittings or
Measuring Cell parts.
If the analyzer is configured for a heated sample system, perform the
sample system leak check prior to applying power to the Oven/Sample
System Enclosure circuitry (must not be hot).
Preventing leaks in the sample handling system is critical to ensure
proper analyzer operation. If sample fluid migrates into the Optical
Bench Assembly or Reflector Block due to a leak in the Measuring
Cell Assembly, the optics will become damaged and will likely require
replacement. Most leaks are preventable with the regular replacement
of the Measuring Cell o-rings.
Do not use a leak detection fluid on hot fittings. If the analyzer system
is at operating temperature, the temperature-control zone circuitry
fuses must be opened to allow the temperature-control zones to cool
before using a leak detection fluid on the fittings.
After all piping and electrical connections have been made:
Refer to the system Analyzer flow diagram in the Ametek supplied draw-
ing package (403900XXX-3).
Identify the portions of the system to be tested.
Identify the location of the pressure sources that can be applied for leak
testing.
When pressurizing the system, do not exceed 1.5 times the rated
pressure for that branch o the sample system. (see inlet markings or
drawings)
If a portion of the system includes a pressure sensor, first, pressurize the
system and then block it off and monitor for a drop over time.
If a pressure sensor and isolation valves are not available, pressurize the
system and bubble-test all joints with a soap solution. (eg. Snoop or the
same kind of fluid as in the Analyzer specified process.)
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CAUTION
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CAUTION
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