14 • 65-2322RK Oxygen Transmitter
8. Allow the gas to flow for two minutes.
9. Verify a voltmeter reading of 434 mV (±2 mV).
10. If necessary, use a small flat-blade screwdriver to adjust the span pot until the voltmeter
reading is 434 mV (±2 mV).
11. Turn the regulator’s on/off knob clockwise to close it.
12. Unscrew the calibration cup from the detector.
13. Unscrew the regulator from the zero air calibration cylinder. For convenience, leave the
sample tubing connected to the regulator and the calibration cup.
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 and quarterly procedures.
Daily
Verify a display reading of 20.9% oxygen at the controller. Investigate significant changes in
the display reading.
Quarterly
Calibrate the oxygen transmitter as described in “Calibration” on page 18 of this manual. See
the calibration frequency discussion in “Calibration Frequency” on page 18 to determine if a
quarterly calibration schedule fits your needs.
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