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Maintenance – RKI Instruments 35-3000RK-OXY User Manual

Page 13

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35-3000RK-OXY Sample-Draw Oxygen Detector • 13

Maintenance

This section describes maintenance procedures. It includes preventive maintenance
procedures. This section also includes procedures to troubleshoot the sample-draw
detector, replace components of the sample-draw detector, and adjust the low flow
setting.

Preventive Maintenance

This section describes a preventive maintenance schedule to ensure the optimum
performance of the sample-draw detector. It includes daily, monthly, and quarterly
procedures.

Daily

1.

Verify that the pilot light is on.

2.

Verify that the flowmeter indicates a flow rate of approximately 1.5 SCFH.
If necessary use the bypass valve or flow adjust potentiometer to adjust the flow rate
to 1.5 SCFH.

3.

Verify a reading of 20.9% at the controller. Investigate significant changes in the
reading.

Monthly

This procedure describes a test to verify that the sample-draw detector responds properly
to oxygen deficiency.

NOTE:

To reduce the response time of this test, use a short incoming sample line. If the
sample-draw detector’s sample line is long, connect a shorter line for this test.

Make sure you reconnect the sample line after you complete this procedure.

NOTE:

Performing a response test on the sample-draw detector may cause alarms. Be
sure to put the controller into its calibration program or disable external alarms

before performing this test

Performing the response test

1.

Exhale into the sample-draw detector’s incoming sample line.

2.

Stop exhaling into the sample line, then verify that the readings at the controller
decreased.

NOTE:

If the reading does not decrease, calibrate the sample draw detector as described

in the “Calibration” section on page 17.

Quarterly

Calibrate the sample-draw detector as described in the “Calibration” section on page 17.