Teledyne 6400EH - Sulfur Dioxide Analyzer - Manual (Page 61)

UV Fluorescence SO2 Analyzer Troubleshooting
Teledyne Analytical Instruments 49
Figure 10-4: Location of UV Reference Detector Potentiomete r
10.3.2.2 PMT H ARDWARE C ALIBRATION (FACTORY CAL)
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.