Inficon Transpector MPH Operating Manual page 135

Table 7-1 Symptom—Cause—Remedy chart (continued)
SYMPTOM
Poor
sensitivity
Poor peak shape
CAUSE
Sensor contaminated
System pressure too low
Mass calibration (resolution)
Sensor operating parameters
set wrong
Improper calibration
Electronics failure
EM has low gain
Sensor contaminated
System pressure too high
Mass calibration required
Electronics failure
Transpector MPH Operating Manual
REMEDY
Degas sensor.
Bake-out sensor.
Service sensor.
Increase sample pressure, if
possible.
Adjust Mass Calibration,
increase peak width.
Check settings of: electron
energy, ion energy, focus
emission current.
Ensure that the total pressure
gauge used for sensitivity
calibration was properly
calibrated.
Return to INFICON for repair.
Bake-out sensor.
Replace sensor.
Degas sensor.
Bake-out sensor.
Service sensor.
Verify pressure less than
5E-4 Torr for
Transpector MPH.
Perform mass calibration.
Return to INFICON for repair.
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