6 - 6
PN 074-550-P1D
SQC-310 Operating Manual
Crystal Fail is displayed. Excessive cable length
between oscillator and
crystal.
In-vacuum cable length
should not exceed 78.1 cm
(30.75 in.).
Use the 15.2 cm (6 in.) cable
between oscillator and
feedthrough.
Bad sensor/feedthrough, or
bad in-vacuum cable, or bad
BNC cable.
SQC-310 or oscillator is
malfunctioning.
Use an ohmmeter to check
electrical continuity and
isolation of sensor head,
feedthrough, in-vacuum
cable, and both BNC cables.
Refer to the sensor operating
manual for detailed
troubleshooting information.
Substitute known good BNC
cables.
Substitute a known good
in-vacuum cable.
Substitute a known good
sensor/feedthrough.
Substitute a PN 760-601-G2
Sensor Emulator for the
sensor.
Test the SQC-310 and
oscillator using the oscillator
test mode (see section 6.6 on
page 6-17).
Substitute a known good
SQC-310 (or other QCM).
Substitute a known good
oscillator.
Table 6-1 Symptom/Cause/Remedy Chart (continued)
SYMPTOM CAUSE REMEDY
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