Inficon IMM-200, Руководство по эксплуатации

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9 | Troubleshooting and Error Messages INFICON
42 / 67 074-733-P1A IMM-200 Operating Manual
SYMPTOM CAUSE REMEDY
strap with 5 to 1 length to
width ratio is
recommended).
b. There is poor ground or
a poor grounding practice.
b. Verify there is proper
earth ground. Use an
appropriate ground strap,
(solid copper strap with 5
to 1 length to width ratio is
recommended). Eliminate
any ground loops by
establishing the correct
system grounding. Verify
proper IMM-200 grounding.
3. IMM-200 does not retain
parameters on power down
(or there is a loss of
parameters on power up).
There is a power supply
problem.
Contact the service
department.
4. The crystal fail message
is always on
a. There is a defective
cable from feedthrough to
IMM-200.
b. There is poor electrical
contact in the transducer,
the feedthroughs, or the in-
vacuum cable.
c. There is a failed crystal.
d. There is no crystal.
e. Two crystals are placed
into the crystal holder.
f. The frequency of the
crystal is out of range.
a. Use an ohmmeter or
DVM to check the electrical
continuity or isolation, as
appropriate.
b. Use an ohmmeter or
DVM to check the electrical
continuity or isolation, as
appropriate.
c. Replace the crystal,
d. Insert a crystal.
e. Remove one of the
crystals.
f. Verify that the crystal
frequency is within the
required range.
9.2 Troubleshooting Sensors
Many sensor head problems can be diagnosed with a DMM (digital multimeter).
Disconnect the short oscillator cable from the feedthrough and measure the resistance
from the center pin to ground. If the reading is less than 10 MΩ, the source of the
leakage should be found and corrected. Likewise, with the vacuum system open,