Ametek Thermox WDG Insitu User Manual page 109

If the analyzer has been operating
for some time and you feel the oxy-
gen reading is inaccurate:
If your analyzer doesn't respond
properly to the calibration gas:
If this doesn't solve the problem, replace the cell, then run another primary calibration.
First check by running a known calibration gas to veri-
fy the analyzer's response. If the analyzer responds to
the calibration gas correctly, it indicates either leaking
or plugged plumbing.
This may indicate a problem with the cell. Before
replacing the cell, put the analyzer through a primary
calibration and see if this improves the response of
the analyzer. If this doesn't work, check for leaks or
plugged plumbing.
Maintenance and Troubleshooting | 6-11