14 • 35-3010RK-01 Sample-Draw Detector
If necessary use the bypass valve or flow adjust potentiometer to adjust the flow rate
to 1.2 SCFH.
3.
Verify a reading of 0%LEL for the combustible channel, 20.9% for the oxygen channel,
and 0 ppm for the CO and H
2
S channels (100 mV at the amp 1 and amp 2 test points).
Investigate significant changes in the reading.
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 or disabling external
alarms.
1.
Verify that the controller is reading 0 for the combustible, CO, and H
2
S channels and
20.9 for the oxygen channel.
If the reading is not 0 on the combustible, CO, or H
2
S channels or 20.9 on the oxygen
channel, set the zero reading as described in “Start Up” on page 12, then continue this
procedure.
2.
Assemble the calibration kit as described in the calibration section. Use of a 4-gas
cylinder is recommended so that all channels may be checked at once.
Performing the response test
NOTE:
This procedure describes the RKI calibration kit that includes a demand flow
regulator.
1.
Screw the regulator into the 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 each channel at the
controller stabilizes within ± 10% of the concentration of the test sample. If the
reading is not within ± 10% of the test sample, calibrate the sample-draw detector as
described in the Calibration section of this manual.
4.
Remove the calibration tubing from the inlet line, then reconnect the inlet line.
5.
Store the calibration kit in a safe place.
Quarterly
Calibrate the sample-draw detector as described in the Calibration section of this manual.
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.
