Thermo Scientific 43iQTL Instruction Manual page 176

Troubleshooting
Troubleshooting Guide
6-4 43iQTL Instruction Manual
Problem
SO
and released by dirt in
tubing or filters of the
calibration system or
contamination inside
the instrument
Averaging time is not
correct
Flasher lamp
Reduced response or no Undefined electronic
response to sample gas failure or pump failure
with alarm(s) indicated
Instrument is not
drawing in sample as
expected
Reduced response or no Instrument is not
response to sample gas properly calibrated
with no alarm(s)
indicated
Instrument is not
drawing in sample as
expected
Possible Cause
bulkheads (they should match).
Perform a leak test as described on
page 5-5.
is being absorbed Replace any lines made of vinyl or
2
plastics with fresh PTFE or stainless
steel. Replace PTFE filter membranes
that look dirty. Remove any filters that
are not PTFE membranes.
Check the "Averaging Time" in the
Settings>Measurement Settings screen.
If too high, the unit will be slow to
stabilize. If too low, the signal may
appear to be noisy.
Replace with known-good lamp to see if
the lamp is the problem.
Check the status and alarms screen to
localize fault.
Check the response to known span gas.
Run an optical span test.
Check the sample flow and pressure in
the Settings>Health Check>Status and
Alarms>Flow and Pressure 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 on
page 5-5.
Verify the SO
coefficient are set appropriately in the
Calibration screen.
Check sample flow and pressure
readings in the Settings>Health
Check>Status and Alarms>Flow and
Pressure 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 on
page 5-5.
Check the external plumbing for leaks or
other problems.
Action
background and SO
2 2
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