Teledyne 501 TRS, Operation Manual, Page: 80 / 111

TROUBLESHOOTING and REPAIR Teledyne API - T102/501 TRS, Addendum to T101 Operation Manual
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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.
NOTE
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.
EXAMPLE
If the reporting range is 800 ppb:
Use 640 ppb span gas.
Adjust the PMT until NORM PMT equals 1280 mV
±
10 mV
13. Wait until the STB value is below 0.5 ppb,
07267B DCN6485