7 - 2
Transpector MPH Operating Manual
EMISSION error (Cold 
Start, Warm Start)
Defective sensor filament 
open, shorted
Check sensor with OHM 
meter.
Replace sensor or filament. 
Electronics failure Return to INFICON for repair.
Insufficient vacuum Verify pressure is less than 
5E-4 Torr.
Sensor operating voltages 
incorrect
Verify correct settings 
Contact INFICON for 
assistance.
Transpector MPH electronics 
box not fully engaged on 
sensor
Make sure that the 
Transpector MPH electronics 
module is pushed all the way 
on sensor.
ANODE error  Defective sensor, anode 
shorted
Check sensor with OHM 
meter for shorts. See sensor 
pin-out diagram.
Fix or replace sensor.
Electronics failure Return to INFICON for repair.
RF error  Defective sensor, RF leads 
open RF/DC card fault
Fix or replace sensor.
Electronics failure Return to INFICON for repair.
Electron Multiplier 
error 
Defective sensor, EM shorted Check sensor with Ohm 
meter. See sensor pin-out 
diagram.
Fix or replace sensor.
EM just replaced Verify that EM is plugged into 
the HV pin properly.
Electronics failure Return to INFICON for repair.
Table 7-1  Symptom—Cause—Remedy chart  (continued)
SYMPTOM CAUSE REMEDY