RKI Instruments 65-2516RK - Manual (Page 12)

8 • 65-2516RK Oxygen Transmitter
12. Turn the regulator’s on/off knob clockwise to close it.
13. Unscrew the calibration cup from the detector.
14. Unscrew the regulator from the zero air calibration cylinder. For convenience, leave
the sample tubing connected to the regulator and the calibration cup.
15. Store the components of the calibration kit in a safe and convenient place.
16. Remove the voltmeter leads from the test points.
17. 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 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 program or disable external alarms before
performing this test.
Preparing for the response test
1. Verify that the 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 7 of this manual, then continue this procedure.
2. Set a voltmeter to measure in the millivolt (mV) range.
WARNING: Do not remove the detector housing cap or junction box cover while the
circuits are energized unless the area is determined to be non-hazardous.
Keep the detector housing cap and junction box cover tightly closed during
operation.
3. Remove the junction box cover, then plug the voltmeter leads into the test points on
the amplifier. Plug the positive lead into the test point labeled TP+; plug the negative
lead into the test point labeled TP-.
Performing the response test
1. Exhale into the bottom of the oxygen detector.
2. Stop exhaling into the bottom of the detector, then verify that the reading on the