RKI Instruments 65-2422RK-05 - Manual (Page 14)

10 • 65-2422RK-05 H
2
S Transmitter
test point labeled TP-.
8. Use the following formula to determine the correct test points output for the test
sample.
Output (mV) = (calibrating sample/fullscale) X 400 + 100
For example, with a test sample of 25 PPM H
2
S and a fullscale setting of
100 PPM, the correct output is 200 mV.
200 (mV) = (25/100) X 400 +100
Performing the response test
1. Turn the regulator on/off knob counterclockwise to open it. The sample will begin to
flow.
2. Allow the gas to flow for two minutes, then verify that the reading is within ± 20% of
the response reading you determined earlier.
NOTE: If the readings are not within ± 20% of the correct response reading, calibrate the
affected transmitter(s) as described in the Calibration section of this manual.
3. Turn the regulator on/off knob clockwise to close it.
4. Unscrew the regulator from the calibration cylinder.
5. Unscrew the calibration cup from the H
2
S detector.
6. Remove the voltmeter leads from the amplifier test points.
7. Reinstall the junction box cover.
8. When the controller display reading falls below the alarm setpoints, return the
controller to normal operation.
Quarterly
Calibrate the H
2
S transmitter 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 H
2
S transmitter.
NOTE: This troubleshooting guide describes transmitter problems only. See the
controller instruction manual for problems you may encounter with the
controller.
Fail Condition
Symptoms
• The controller indicates a fail condition.
Probable causes
• The transmitter wiring is disconnected or misconnected.
• The transmitter’s zero reading is low enough to cause a fail condition.
• The transmitter is malfunctioning.