Maintenance and Troubleshooting
Hardware Installation and Maintenance Manual B
–19
12. Reinstall cell inlet and cell outlet using a 9/16 in. wrench.
13. Reconnect the thermistor.
14. Connect the new pressure sensor harness and cable to the circular
connector.
15. Reconnect the optical cable harness.
16. Close the door to the SCS enclosure.
17. Conduct a leak test to determine that the new pressure sensor is not
leaking.
18. Power up the system. Refer to the Firmware Manual for this analyzer
for “Powering Up the Analyzer”.
19. Run a validation on the analyzer. Refer to the Firmware Manual for
instructions on “Validating the Analyzer.”
a. If the system passes, the pressure sensor replacement is
successful.
b. If the system does not pass, the pressure sensor replacement
was not successful. Contact Service if the system does not pass.
Refer to “Service Contact” on page B-31.
Periodic SCS Maintenance
The status of the SCS should be checked regularly to confirm proper operation
(pressures, flows, etc.) and detect potential problems or failures before
damage occurs. If maintenance is required, isolate the part of the system to be
serviced by following the appropriate procedure under “Shutting Down the
SCS” on page 4-7.
All filter elements should be checked periodically for loading. Obstruction of a
filter element can be observed by a decreasing supply pressure or bypass flow.
Do not allow cell to exceed 10 PSIG or damage could occur.
Contact Service for any questions related to leak testing the
pressure sensor. Refer to “Service Contact” on page B-31.
Due to the chemical properties of the process samples, care must
be taken to repair or replace components with proper materials of
construction. Maintenance personnel should have a thorough
knowledge and understanding of the chemical characteristics of
the process before performing maintenance on the SCS.
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