Pressure Leak Check - Ametek 993X Manual

Pressure Leak Check


This procedure
discusses discusses how to
perform a leak check on the
9933WM Analyzer. For other
analyzer models, refer to the
User Manual specific to that
analyzer.
Figure 8.1.
Calibration menu (shown with
Gas Sensor option enabled).
52 | 993X Gas Analyzer
The analyzer has been checked at the factory for pressure leaks. However,
fittings can loosen during transport. Also, fittings are tightened when the
Sample, Vent, and other lines are connected during initial installation, and
fittings are loosened/retightened whenever the Measuring Cell is removed
and reinstalled (i.e., for service). Therefore, the entire analyzer sample system
must be checked for leaks before any sample gas is introduced into the sample
system for the first time or following the replacement of any lines/fittings or
Measuring Cell or other sample system parts.
Hazardous Locations
Before proceeding, test the area around the analyzer for explosive
gases and proceed only when the area is found to be safe.
Preventing leaks in the sample system is critical to ensure proper ana-
lyzer operation. If sample gas migrates into the Optical Bench Assem-
bly or Reflector Block due to a leak in the Measuring Cell, the optics
will become damaged and most likely require replacement. Most leaks
are preventable with the regular replacement of the Measuring Cell
o-rings.
To leak check the sample system:
1. From the Calibration menu, change the Flow Control setting to Auto.
2. Close the sample inlet valve. Purge the analyzer sample system with Zero
gas for 2–3 minutes.
PN 903-8820, Rev A