65-2321RK Oxygen Transmitter • 9
14. Store the components of the calibration kit in a safe and convenient place.
15. Remove the voltmeter leads from the test points.
16. Secure the junction box cover to the junction box.
Maintenance
This section describes maintenance procedures. It includes preventive maintenance,
troubleshooting, and component replacement procedures.
Preventive Maintenance
This section describes a preventive maintenance schedule to ensure the optimum
performance of the oxygen transmitter. It includes daily, monthly, and quarterly
procedures.
Daily
Verify a display reading of 20.9% oxygen at the controller. Investigate significant changes
in the display reading.
Monthly
This procedure describes a test to verify that the oxygen transmitter responds properly to
oxygen deficiency.
NOTE:
Performing a response test on the oxygen transmitter may cause alarms. Be sure
to put the controller into its calibration mode or disable external alarms before
performing this test.
Preparing for the response test
1.
Place the controller into its calibration mode or disable external alarms.
2.
Verify that the controller display reading for the channel you are testing is 20.9%
oxygen.
If the display reading is not 20.9% oxygen, set the fresh air reading of the transmitter
as described in “Start Up” on page 8, then continue this procedure.
3.
Unscrew and remove the junction box cover.
4.
Set a voltmeter to read in the millivolt (mV) range.
5.
Plug the voltmeter leads into the test points on the amplifier. Plug the positive lead
into the red + test point; plug the negative lead into the black - test point.
Performing the response test
1.
Exhale into the bottom of the oxygen detector for a few seconds.
2.
Stop exhaling into the bottom of the detector, then verify that the reading on the
voltmeter decreased from the normal reading, 434 mV.
NOTE:
If the reading does not decrease, calibrate the detector as described in
“Calibration” on page 13.
3.
Remove the voltmeter leads from the amplifier test points, then secure the junction
box cover to the junction box.
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