RKI Instruments 35-3010RK-06-02 - Manual (Page 18)

14 • 35-3010RK-06-02 Sample-Draw Detector
at the amp 1 test point), and background concentration for the CO
2
channel. Typical
background concentrations of CO
2
vary from 200 to 400 ppm depending on location.
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 monitoring device. Take appropriate action
to avoid this, such as entering the calibration mode at the monitoring device or
disabling external alarms.
1. Verify that the controller is reading 0 for the CO channel, 20.9 for the oxygen channel,
and a typical background concentration for the CO
2
channel.
If the reading is not 0 on the CO channel, 20.9 on the oxygen channel, or a typical
background concentration for the CO
2
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 3-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 the channel or channels at
the controller you are checking 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 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.
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 monitoring device if it exhibits any problems.