4.3
Procedure for Replacing the Oxygen Sensor
Oxygen Sensor Replacement:
The characteristics of a precision electrochemical fuel cell are similar to those of a battery. They both
provide an output that is nearly constant throughout their useful life and simply fall of sharply to-
wards zero at the end.
If the process sample that is being analyzed is in the low range (0 - 10 ppm) of oxygen concentra-
tion, cell failure will be indicated by the inability to properly calibrate the analyzer. The user will also
find that very little adjustment of the span calibration feature will be necessary to keep the analyzer
in calibration during the sensors useful life. If a large adjustment is needed to calibrate the unit, or
calibration cannot be reached, the sensor should immediately be replaced.
** Note, make sure to read section 2.5 “Installing the Oxygen Sensor” before replacing the sensor.
No tools are required to replace the sensor. Open up the right enclosure to expose the sensor hous
-
ing. Unscrew (Counter-Clockwise) the stainless steel nut. Once free, open the top portion of the
sensor housing (off-white nylon) exposing the old oxygen sensor. Remove the old oxygen sensor,
disposing like you would a lead-acid battery in accordance with your local regulations.
Remove the new sensor from its package and remove the shorting strips. Place the sensor screen
side down in the sensor housing with the copper circuit board pointed up. Proceed to re-connect the
collar (H3 flow through sensor housing).
After the sensor has been replaced, proceed to the Span Calibration section and purge with inert gas.
** Trace oxygen sensor should not be exposed to ambient air for more than a few minutes or their
response time and expected life will be adversely affected.
4.4
Troubleshooting
For troubleshooting and advanced maintenance techniques, please contact your factory representa-
tive for assistance.
Email: [email protected]
Ph: 1-949-398-2879
Maintenance
OMD-625 Oxygen Analyzer
Designed, Tested and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com
