PAC R6000S Operation Manual page 76

R6000S Operation Manual: Rev. G
Symptom
Non-repeatable Results
Inaccurate Results
Page 74 of 92
Probable Cause
Amplifier saturation
Contaminated gas supply
Contaminated Pyrotube
Incomplete sample
combustion
Flow-path restrictions
Defective Membrane Dryer
Reduced UV source output
PMT Voltage Change
Abnormal ambient temp
change
Light leakage
Defective PMT or Cooler
Defective Pre-amp PCB or
Amplifier PCB
Gas leak
Inaccurate calibration curve
Inaccurate calibration
standards
Contaminated gas supply
Contaminated Pyrotube
Incomplete sample
combustion
Reduced UV source output
PMT Voltage Change
Corrective Action
Reduce Sample size,
concentration or amplifier gain.
Replace gas supply.
Clean or replace Pyrotube.
Ensure furnace temperature
and gas flows are correct.
Check fittings, ferrules,
Pyrotube, and vents in the
flow path and remove
restrictions.
Replace Membrane Dryer.
Replace UV Lamp.
Replace or adjust PMT HV.
Stabilize ambient temperature.
Use light leak test to find leaks
and repair as needed.
Replace PMT or Cooler.
Replace Pre-amp PCB or
Amplifier PCB.
Use gas leak test to find leaks
and repair as needed.
Perform Calibration
Procedure.
Replace cal standard.
Replace gas supply.
Clean or replace Pyrotube.
Ensure furnace temperature
and gas flows are correct.
Replace UV Lamp.
Reset PMT high-voltage.
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