Operational Failures - Agilent Technologies VS Series Operation Manual

C.3 Operational Failures
Gain Too High error message and a flashing C appear on the front panel display after
a calibration attempt.
Internal Calibration Not OK
External Calibration Not OK
Insufficient helium signal during calibration - Gain > 9.0 internal, Gain > 150 external
Causes/Resolutions
1. Calibrating to the wrong calibrated leak or the leak rate value was incorrectly entered:
a. Open the Calibration Set Up screen and verify that the correct calibrated leak is
selected.
b. Select Setup Menu > Maintenance Option > Internal Calibrated Leak and verify that
the programmed parameters match the calibration certificate or physically check the
information on the label for the internal standard leak.
2. Internal or external calibrated leak is damaged/destroyed. If the:
Internal full calibration failed; try calibrating to an external calibrated leak.
External calibration is successful turn on the internal calibrated to validate the leak
rate and vice versa.
3. I/O board is defective:
Front Panel Display - abnormal parameters:
4. Filament failure - not generating enough electrons for proper ionization to occur:
Switch filaments and re-calibrate and if the second filament fails, inspect the ion
source and filaments and replace (Figure C-2 on page C-7). See Section B.13
"Filament Replacement".
Measure the ion voltage with respect to filament (1 or 2). The voltage should = 88
VDC ± 1%; if not, replace Ion Source board.
5. Contaminated ion source:
Measure ion voltage/ read ion voltage (Manual Tuning screen). The voltage should
be > 27 VDC; if not, the ion source is contaminated.
C-10
VS Series Component Leak Detector
Front Panel Display Option
NOTE
A flashing C indicates that the leak detector has failed a
calibration attempt.
Verify the internal standard leak is active.
Verify on the Manual Valve screen that Std Leak symbol appears and that the
temperature is correct.