Honeywell ACM 150 Manual To Installation, Operation, And Maintenance page 128

ACM 150
You can observe the pressure as the valves switch from point to point. The line
pressure should start low and build up for each line as it is pressurized.
Points either pass or fail the test. In order to pass, a pressure has to build up in
the sample line that is sufficient to exceed the set point of the sample pressure
transducer. If one or more line fails the leak test, go to the ACM 150 monitor to
identify the problem, as follows:
• Leak at Fittings: Verify that the fittings on both ends of the sample tube are tight
(i.e. can not be loosened by hand). Start with the connection port on top of the
ACM 150 monitor. Then inspect the fitting that connects to the check valve at the
opposite end (inlet) of the tube. If both fittings are tight the check valve may be
failing to hold pressure (go to next step) or, less likely, the sample tubing has a
leak.
• Check Valve Leak: The line can only pass if its check valve shuts off when
pressurized during this test. Particles accumulating in a check valve may prevent
it from sealing. Resolve this by disassembling and cleaning the check valve. At
the same time, inspect the in-line filter and replace it, if necessary. Check the
tubing if you can not correct the leak.
• Tubing Leak: Verify this by removing the fitting from the check valve inlet and
capping it off. Then, run the leak test and observe. If the tube fails to hold
pressure, look for a cut or a hole. Replace damaged tubing and make changes to
prevent a repeat of the same problem.
• Setup Problem: check the setup
problems.
Evaluating/Resolving the ZPD Location
If the ZPD range is not within tolerance, determine the following:
1. Is the BenchType variable in the acm.cnf set correctly?
Check the acm.cnf and make sure that all of the numbers are set correctly for the
bench type.
2. Bench resolution in the acm.cnf should be set to 4 cm
For the Perkin Elmer bench, you will find the "BenchResolution = 4.0" in the acm.
cnf.
3. Is the FTIR bench running normally?
The Perkin Elmer bench status can be read from the AcmAdapter Log files.
4. Has the ACM 150 monitor been sending out Service Status messages, such as:
• ZPD location out of range
• Failure to get interferogram
Try correcting the problem by turning the optics bench power switch off. Wait 10
minutes. Re-power it, wait one minute and observe the new ZPD location. If it
resets to within tolerance, the problem is resolved.
For the Perkin Elmer bench, start up the Perkin Elmer software and perform
diagnostics. If the problem remains, contact Honeywell Analytics for service
assistance.
(Line leak test setup procedure) and correct any
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