Teledyne 501 TRS, Operation Manual, Page: 81 / 111

Teledyne API - T102/501 TRS, Addendum to T101 Operation Manual TROUBLESHOOTING and REPAIR
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14. Scroll to the NORM PMT value.
15. Set the HVPS coarse adjustment switch to the lowest setting that will
give you more than 1000 mV NORM PMT signal.
The coarse adjustment typically increments the NORM PMT signal in
100-300 mV steps.
16. Adjust the HVPS fine adjustment such that the NORM PMT value is at
or just above 800 mV.
NOTE
Do not overload the PMT by setting both adjustment switches to their maximum
setting. This can cause permanent damage to the PMT.
17. Continue adjusting the both the coarse and fine switches until NORM
PMT is as close to 800 mV as possible.
18. Adjust the gain adjustment potentiometer until the NORM PMT value is
800 mV ±10 mV.
19. Perform span and zero-point calibrations (see Calibration Procedures
section in the T101 Manual - PN 07266) to normalize the sensor
response to its new PMT sensitivity.
20. Review the slope and offset values, and compare them to the values in
Calibration Data Quality Evaluation Table in the Calibration Quality
section in the T101 Manual - PN 07266.
07267B DCN6485