Teledyne 6200T - Sulfides Analyzer - Manual (Page 238)

Troubleshooting Model 6200T Total Sulfur Analyzer
238 Teledyne Analytical Instruments
Problem Corrective Action
NOT HEATING:
PV/SV switch to PV. Is it heating?
PV/SV switch to SV. Set point correct?
Socket in place on back of temperature controller?
Check M501TS Wiring Diagram in the Appendix
Thermocouple has failed?
‘UUUU’ shown on front panel of 501TS.
Also, check thermocouple resistance.
TS ANALYZER UNSTABLE:
Leak-check.
(Pressurize and see if pressure falls.
Use soap bubble to find leak.)
EFFICIENCY <90%:
Leaking? Leak-check.
Plugged? Compare flow through and bypassing
converter.
Flow too high?
Set-point temperature optimized?
Span gas correct?
Contaminated? Check inside of Teflon tubing
CONVERTER TEMP UNSTABLE: Perform Auto-Tune procedure in Section 3.4.1.3.
A systematic approach to troubleshooting will generally consist of the following five
steps:
1. Note any WARNING MESSAGES and take corrective action as necessary.
2. Examine the values of all TEST functions and compare them to factory values.
Note any major deviations from the factory values and take corrective action.
3. Use the internal electronic status LEDs to determine whether the electronic
communication channels are operating properly.
4. Verify that the DC power supplies are operating properly by checking the
voltage test points on the relay PCA.
5. Note that the analyzer’s DC power wiring is color-coded and these colors match
the color of the corresponding test points on the relay PCA.
6. Suspect a leak first!
 Customer service data indicate that the majority of all problems are
eventually traced to leaks in the internal pneumatics of the analyzer or the
diluent gas and source gases delivery systems.
 Check for gas flow problems such as clogged or blocked internal/external
gas lines, damaged seals, punctured gas lines, a damaged / malfunctioning
pumps, etc.
7. Follow the procedures defined in Section 12.6 to confirm that the analyzer’s
vital functions are working (power supplies, CPU, relay PCA, touch-screen
display, PMT cooler, etc.).
 Refer to
 Figure 3-5 for the general layout of components and sub-assemblies in the
analyzer.
 Refer to the wiring interconnect diagram and interconnect list in Appendix D.