14 • 65-2422RK-05 H
2
S Transmitter
10. If necessary, use a flat-blade screwdriver to adjust the span pot until the voltmeter reading
is 100 mV (±2 mV).
11. Turn the regulator’s on/off knob clockwise to close it.
12. Unscrew the calibration cup from the detector.
13. Unscrew the regulator from the zero air calibration cylinder. For convenience, leave the
sample tubing connected to the regulator and the calibration cup.
14. Store the components of the calibration kit in a safe and convenient place.
15. Remove the voltmeter leads from the test points.
16. Secure the junction box cover to the junction box.
Maintenance
This section describes maintenance procedures. It includes preventive maintenance,
troubleshooting, and component replacement procedures.
Preventive Maintenance
This section describes a preventive maintenance schedule to ensure the optimum performance
of the H
2
S transmitter. It includes daily and quarterly procedures.
Daily
Verify a display reading of 0 PPM H
2
S at the controller. Investigate significant changes in the
display reading.
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.
