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Teledyne API - T100 UV Fluorescence SO2 Analyzer Troubleshooting & Service
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Figure 12-12: Disassembling the Shutter Assembly
6. Carefully remove the UV filter.
7. Install the UV filter.
8. Handle carefully and never touch the filter’s surface.
9. UV filter’s wider ring side should be facing out.
10. Install UV filter retainer and tighten screws.
11. Install the shutter cover and minifit connector. Tighten 4 shutter cover screws.
12. Reinstall the sensor module and Plug J4 connector into the motherboard.
12.7.2.5. ADJUSTING THE UV LAMP (PEAKING THE LAMP)
There are three ways in which ambient conditions can affect the UV Lamp output and
therefore the accuracy of the SO
2
concentration measurement. These are:
Line Voltage Change: UV lamp energy is directly proportional to the line voltage.
This can be avoided by installing adequate AC Line conditioning equipment such as a
UPS/surge suppressor.
Lamp Aging - Over a period of months, the UV energy will show a downward trend
and can be up to 50% in the first 90 days, and then a slower rate, until the end of useful
life of the lamp. Periodically running the UV lamp calibration routine (refer to Section
5.9.6) will compensate for this until the lamp output becomes too low to function at all.
Note
As the lamp degrades over time, the softw
are for the CPU compensates
for the loss of UV output.
06807C DCN6650