XGS-600 Gauge Controller
DRAFT 4/15/14
49
One or more ion gauge
channels (HFIG and IMG)
appear to restart, sometimes a
BDCOMM message appears first
A major EMI disturbance or
other anomaly has caused a
sensor board watchdog timeout
This is how the XGS-600
recovers from hard and soft
errors. No action required.
BDCOMM message appears on
one or more channels and stays
A major EMI disturbance or
other anomaly has caused a
non-recoverable software error
Cycle AC (mains) power to the
unit OFF and ON again to
recover
IMG reads 10 mT Pressure is greater than 10 mT Wait for pressure to drop into
operating range or use Auto-On
feature to control IMG
Display goes blank A major EMI has caused a
display or software error
Cycle AC (mains) power to
the unit OFF and ON again
to recover, or wait for the
automatic screen refresh
(every 20 minutes)
Convection or TC readings
fluctuate when first at HI VAC
but then quiet down
This is normal behavior of the
Convectorr and TC gauges when
doing a pumpdown.
None
Convection or TC readings
fluctuate in excess of 1 mT
continuously when at Hi VAC
Possible defective gauge. Replace gauge
Convection or TC readings
unstable at atmosphere when
measuring Helium
This is normal performance for
thermal loss gauges in helium
Refer to “Helium Measurement
Capability” on page 36 for
performance limits when
measuring helium
Table 4-2 Troubleshooting (Continued)
Problem Cause Action
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