GE Sievers InnovOx Operation And Maintenance Manual page 196

Chapter 9: Troubleshooting
• Monitor the pressure appearing on the right side of the display. Note the pressure at time = 00:00, then
note the pressure 30 sec. later (time = 00:30).
• Press the Gas Manifold button to stop the test.
• Repeat this test until the pressure drop stabilizes to within 0.5 psia. Usually five repetitions should be
sufficient.
• The pressure should not have dropped more than 3 psia during the 30 sec. This procedure may need to
be repeated 5 or 6 times to relax all the compliance in the system that can look like a false leak. If you
perform the test 5-6 times and the value still drops by more than 3 psig, first check that the NDIR end
cap outlet gas line is plugged. If it is correct, check for leaks in the tubing or valves between V2-GS and
V1-R, V2-R, and V7-SH. Ensure the brass fittings on the gas manifold in the Gas Control Manifold are not
leaking. Check gas connections leading to the NDIR end caps. If all of those items are correct, then
contact GE Analytical Instruments for further information.
• Remove the plug on the NDIR end cap outlet gas line if this is the last leak test to be performed.
Otherwise, leave the plug in place and proceed to the next leak test.
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