Varian 979 Series, Operation Manual

Page: 53 / 140

Model 979 Series Helium Mass Spectrometer Leak Detector
DRAFT 9/15/03
2-11
FILAMENT 2 BURNT OUT Indicates that filament 2 of the ion source has burnt out. Filament 1 will
automatically light, if it is still good, and the leak detector will display a
flashing C in the leak rate exponent indicating that a calibration routine
is required.
FILAMENT WAIT Indicates that the system is lighting the filament.
Flashing C on exponent display Indicates that the leak detector requires calibration.
GAIN TOO HIGH Indicates that the gain value required to calibrate the leak detector
during the calibration routine is greater than the maximum allowable
value. This is generally the result of the system sensitivity being too
low.
GAIN TOO LOW Indicates that the gain value required to calibrate the leak detector
during the calibration routine is less than the minimum allowable value.
This is generally the result of the system sensitivity being too high.
NO FOCUS PEAK Indicates a tuning/calibration failure due to the system not detecting a
focus peak during the auto-tuning routine.
NO ION PEAK Indicates a tuning/calibration failure due to the system not detecting an
ion peak during the auto-tuning routine.
OFFSET WAIT Indicates that the system is setting the OFFSET value.
REJECT Indicates a test object failure during an Auto Sequencer Test cycle.
See Section 2.6.3 “Auto Sequencer Set-Up” on page 2-17.
STABILIZATION WAIT Indicates that the system is waiting for the electronics to stabilize
before completing the start-up routine.
STD LEAK PREP Indicates that the optional internal calibrated leak is being roughed
before it is introduced directly to the system for calibration verification.
SWITCHING FILAMENTS Indicates that the system is momentarily in the process of switching
from a burnt out filament to the next available filament.
SYSTEM PRESSURE WAIT Indicates that the system (spectrometer tube) pressure is too high to
light the ion source filament.
SYSTEM READY Indicates that the system is ready for testing. This message will only
be present during the initial start-up and is cleared after the first test
cycle.
ZEROING Indicates that the leak detector is in the process of Zeroing out a
background signal. The Zero routine is only initiated automatically
during the start up and calibration routines, or manually when the
operator presses the ZERO button on the front control panel.
ZEROING WAIT Indicates that the system is setting the initial zero values during the
start-up routine.
Table 2-3 979 Condition States (Continued)
Display Description