PMT Hardware Calibration (FACTORY CAL) Teledyne T100H SO2 Analyzer

PMT Hardware Calibration (FACTORY CAL) Teledyne T100H SO2

 The sensor module hardware calibration adjusts the slope of the PMT output when the instrument’s slope and offset values are outside of the acceptable range and all other more obvious causes for this problem have been eliminated.

1. Set the instrument reporting range type to SNGL (see Section 6.7.4 of the T100 Manual)

 2. Perform a zero–point calibration using zero air (see Section 7 of the T100 Manual).

 3. Let the instrument stabilize by allowing it to run for one hour.

 4. Adjust the UV Lamp. (See Section 10.3.2.1 of this addendum)

 5. Perform a LAMP CALIBRATION procedure (see Section 6.9.7 of the T100 Manual).

 6. Locate the Preamp board (see Figure 3-4 of this addendum).

 7. Locate the Following Components On the Preamp board (see Figure 10-5 of this addendum):

•  HVPS coarse adjustment switch (Range 0-9, then A-F)
•  HVPS fine adjustment switch (Range 0-9, then A-F)
•  Gain adjustment potentiometer (Full scale is 10 to 12 turns)

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 STABIL (see Section 6.2.1 of the T100 Manual)

 12. Feed span gas into the analyzer.

 13. Wait until the STABIL value is below 0.5 ppm,

NOTE : Use a span gas  equal to 80% of the reporting range. 

Example: for a reporting range of 200 ppm, use a span gas of 160 ppm. 

14. Scroll to the OFFSET function and record the value.

 15. Scroll to the NORM PMT value.

 NOTE: Do not overload the PMT by accidentally setting both adjustment switches to their maximum setting.  This can cause permanent damage to the PMT. 

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