Thermo Scientific 43i, Инструкция по эксплуатации

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Troubleshooting
Troubleshooting Guides
6-4 Model 43i Trace Level-Enhanced Instruction Manual Thermo Fisher Scientific
Malfunction Possible Cause Action
no response to span gas.
Calibration system
failure
Check solenoids or other hardware to
be sure that span gas is being
delivered.
Flow rate of the diluted
span mix is inadequate. Check by-pass or atmospheric vent to
verify that the zero air system is
providing more flow than the
instrument draws.
Instrument is not
drawing in span gas. Check sample Flow and Pressure
readings on the Diagnostics screen.
Use an independent flow meter to
check flows at the sample inlet and
exhaust bulkheads (they should
match).
Perform a leak test, as described in
the “Preventive Maintenance”
chapter.
SO
2
is being absorbed by
tubing, filters, or dirt in
the calibration system.
Replace any lines made of vinyl or
other plastics with fresh Teflon or
stainless steel. Replace Teflon filter
membranes that look dirty. Remove
any filters that are not Teflon
membranes.
Flash lamp has failed. Listen for the rapid clicking of the
flash lamp. Check the flash lamp
voltage and intensity.
PMT or input board has
failed. Check the PMT voltage and run the
optical span test. A good optical span
test indicates that the PMT is OK and
that the problem is more likely the
flash lamp.
Zero or Span will not
stabilize. Flow rate of the diluted
span mix is inadequate. Check by-pass or atmospheric
pressure vent to verify that the zero
air system is providing more flow
than the instrument is drawing.
Instrument is not
drawing in span gas. Check sample Flow and Pressure
readings on the Diagnostics screen.
Use an independent flow meter to
check flows at the sample inlet and
exhaust bulkheads (they should
match).
Perform a leak test, as described in
the “Preventive Maintenance”
chapter.
SO
2
is being absorbed Replace any lines made of vinyl or