Thermo Scientific 43iQ, Инструкция по эксплуатации

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Troubleshooting
Troubleshooting Guide
Thermo Scientific 43iQ Instruction Manual 6-5
Problem Possible Cause Action
Perform a leak test as
described on page
5-5 .
Reduced response or no
response to sample gas
with no alarm(s) indicated Instrument is not properly
calibrated Verify the SO
2
background and
SO
2
coefficient are set
appropriately in the Calibration
screen.
Instrument is not drawing in
sample as expected 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.
Check all external plumbing
and the source of the sample to
verify that the SO
2
is not being
absorbed by the sampling
system. Lines carrying SO
2
must be made from clean PTFE
or stainless steel.
Detection circuit failure Run the optical span text to
verify PMT and associated
electronics.
PMT failure Check the PMT voltage. Adjust
if needed.
Flash lamp failure Check the lamp voltage.
Perform a detector Autocal. If
outside of spec, replace the
detector.
Span calibration coefficient
outside acceptable limits of
0.5–2.0. Bad span gas Verify quality of span gas.
System leak Perform a leak test as
described on page
5-5 .
Insufficient calibrator flow Verify calibrator is providing a
flow of at least 0.8 LPM.
Excessive noise or spikes
on analog outputs Defective or low sensitivity Check PMT voltage and run an
optical span test. Replace PMT
with known-good unit if