RKI Instruments 35-3000RK-OXY - Manual (Page 13)

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.