Teledyne T100, Инструкция по эксплуатации, Страница: 299 / 404

Teledyne ML - T100 UV Fluorescence SO2 Analyzer Troubleshooting & Repair
06807A(DCNxxxx) 299
9. HVPS fine adjustment switch (Range 0-9, then A-F).
10. Gain adjustment potentiometer (Full scale is 10 to 12 turns).
11. Set the HVPS coarse adjustment to its minimum setting (0).
12. Set the HVPS fine adjustment switch to its maximum setting (F).
13. Turn the gain adjustment potentiometer clockwise to its maximum setting.
14. Set the front panel display to show STABIL (refer to Section 4.2.1).
15. Feed span gas into the analyzer.
16. Wait until the STABIL value is below 0.5 ppb.
IMPORTANT
Use a span gas equal to 80% of the reporting range.
Example: for a reporting range of 500 ppb, use a span gas of 400 ppb.
17. Scroll to the OFFSET function and record the value.
18. Scroll to the NORM PMT value.
ATTENTION
COULD DAMAGE INSTRUMENT
Do not overload the PMT by accidentally setting both adjustment switches to their
maximum setting. This can cause permanent damage to the PMT.
19. Determine the target NORM PMT value according to the following formulas.

If the reporting range is set for

2,000 ppb (the instrument will be using the
2,000 ppb physical range):
Target NORM PMT = (2 x span gas concentration) + OFFSET

If the reporting range is set for

2,001 ppb(the instrument will be using the
20,000 ppb physical range):
Target NORM PMT = (0.181 x span gas concentration) + OFFSET
EXAMPLE
: If the OFFSET IS 33 mV, the Reporting Range is 500 ppb, the span
gas should be 400 ppb and the calculation would be:
Target NORM PMT =(2 x 400) + 33 mV
Target NORM PMT = 833 mV
20. Set the HVPS coarse adjustment switch to the lowest setting that will give you more
than the target NORM PMT signal from Step 16.

The coarse adjustment typically increments the NORM PMT signal in 100-300
mV steps.
21. Adjust the HVPS fine adjustment such that the NORM PMT value is at or just above
the target NORM PMT signal from Step 16.
22. Continue adjusting the both the coarse and fine switches until norm PMT is as close
to (but not below) the target NORM PMT signal from Step 16.