Figure 11-4. Pre-Amplifier Board Layout - Teledyne T102 Operation Manual

TROUBLESHOOTING and REPAIR
If a reporting range other than 500 ppb is used in this procedure:
Use a span gas equal to 80% of the reporting range and adjust the PMT to a target
NORM PMT value of twice the ppb value of the span gas.
Adjust the PMT until NORM PMT equals 1280 mV ± 10 mV
78

Figure 11-4. Pre-Amplifier Board Layout

8. Set the HVPS coarse adjustment to its minimum setting (0).
9. Set the HVPS fine adjustment switch to its maximum setting (F).
10. Turn the gain adjustment potentiometer clockwise to its maximum
setting.
11. Set the front panel display to show TRS STB (press SAMPLE, TEST,
<TST TST>. See Menu Tree in Appendix A of this manual)
12. Feed 400 ppb span gas into the analyzer.
If the reporting range is 800 ppb:
Use 640 ppb span gas.
13. Wait until the STB value is below 0.5 ppb,
Teledyne API - T102/501 TRS, Addendum to T101 Operation Manual
NOTE
EXAMPLE
07267B DCN6485