16 • 35-3010A-09 Sample-Draw Detector
Monthly
This procedure describes a test to verify that the sample-draw detector responds properly
to the target gases.
Preparing for the response test
CAUTION:
This procedure may cause alarms at the controller. Take appropriate action to avoid
this, such as entering the calibration mode at the controller.
1.
Verify that the controller is reading 0% volume for the IR CH
4
channel and 20.9% for
the oxygen channel.
If the reading is not 0% volume on the IR CH
4
channel or 20.9% on the oxygen
channel, set the zero reading as described in “Start Up” on page 14, then continue this
procedure.
2.
Assemble the calibration kit as described in the Calibration section of this manual.
Performing the response test
NOTE:
This procedure describes the RKI calibration kit that includes a demand flow
regulator.
1.
Screw the regulator into the methane calibration cylinder.
2.
Connect the calibration tubing from the regulator to the inlet line at or near the INLET
fitting. Gas will begin to flow.
3.
After approximately one minute, verify that the reading for the IR CH
4
channel at the
controller stabilizes within ± 20% of the concentration of the test sample. If the
reading is not within ± 20% of the test sample, calibrate the sample-draw detector as
described in “Calibration, IR CH
4
Detector” on page 20.
4.
Remove the calibration tubing from the inlet line.
5.
Store the calibration kit in a safe place.
6.
Exhale into the sample-draw detector’s inlet line.
7.
Stop exhaling into the inlet line, then verify that the oxygen reading at the controller
decreased.
8.
If the reading did not decrease, calibrate the sample-draw detector as described in
“Calibration, Oxygen Detector” on page 21.
9.
Reconnect the inlet line.
Quarterly
Calibrate the sample-draw detector as described in “Calibration, IR CH
4
Detector” on
page 20 and “Calibration, Oxygen Detector” on page 21.
Troubleshooting
The troubleshooting guide describes symptoms, probable causes, and recommended
action for problems you may encounter with the sample-draw gas detector.
NOTE:
This troubleshooting guide describes sample-draw detector problems only. See
the instruction manual for the controller if it exhibits any problems.
