Figure 5-19. Pre-Amplifier Board Layout - Teledyne T200 User Manual

7. Wait until the Stability is below 0.5 ppb
8. Scroll to the NORM PMT test function on the analyzer's front panel.
9. With the NO gas concentrations mentioned in Step 5 above, the NORM PMT
value should be 900 mV.
10. Set the HVPS coarse adjustment to its minimum setting (0).
11. Set the HVPS fine adjustment switch to its maximum setting (F).
•
12. Adjust the HVPS fine adjustment such that the NORM PMT value is close to the
target value.
•
ATTENTION
Note
13. Perform a span point calibration (Section 4.2.1.2) to normalize the sensor
response to its new PMT sensitivity.
14. Review the slope and offset values:
•
•
083730200A DCN7962

Figure 5-19. Pre-Amplifier Board Layout

Set the HVPS coarse adjustment switch to the lowest setting that will give
you just above the target value for NORM PMT signal.
It may be necessary to go back and forth between coarse and fine
adjustments if the proper value is at the threshold of the min/max coarse
setting.
COULD DAMAGE INSTRUMENT AND VOID WARRANTY
Do not overload the PMT by accidentally setting both adjustment
switches to their maximum setting. Start at the lowest setting and
increment slowly: no sooner than every 10 seconds between
adjustments.
During these adjustments, the NORM PMT value will fluctuate as
the analyzer continues to switch between NO and NOx streams as
well as between measure and Auto Zero modes.
The slope values should be 1.000 ±0.300.
The offset values should be approximately 0.0 (-20 to +150 mV is allowed).
Teledyne API T200 NO/NO /NO Analyzer with NumaView™ Software
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