RKI Instruments 35-3010RKA-06 - Manual (Page 19)

35-3010RKA-06 Sample-Draw Detector • 15
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 and H
2
S channels.
If the reading is not 0 on the combustible or H
2
S channels, set the zero reading as
described in “Start Up” on page 13, then continue this procedure.
2. Assemble the calibration kit as described in “Preparing for Calibration” on page 19.
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. A calibration kit that uses a calibration bag is also available.
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 ± 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” on page 19.
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 “Calibration” on page 19.
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.
Fail Condition
Symptoms
• The sample-draw detector’s Fail light is on.
• The controller is operating properly but indicates a reading well below zero on one or
more channels.
Probable Causes
• The sample-draw detector’s flow rate is too low because of an obstructed sample line,