RKI Instruments Pioneer 4W - Manual (Page 62)

Combustilbe Gas Transmitter • 16 Pioneer Operator’s Manual (PRELIMINARY)
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 combustible gas transmitter. It includes daily, monthly, and quarterly
procedures.
Daily
1. Verify that the pilot light on the applicable analyzer card is flashing. If the pilot light is
not flashing, see the following troubleshooting guide in this insert.
NOTE: If the Pioneer’s main PILOT light is not on, see the Troubleshooting guide in
Chapter 5, Maintenance.
2. Verify a display reading of 0 %LEL. Investigate significant changes in the display
reading.
Monthly
This procedure describes a test to verify that the combustible gas transmitter responds
properly to the target gas.
Preparing for the response test
1. Verify that the display reading(s) for the channel(s) you plan to test is 0.
If the display reading(s) is not zero, set the zero reading of the applicable
transmitter(s) as described in the Start Up section of this insert, then continue this
procedure.
2. Assemble the calibration kit as described in the Calibration section of this insert.
NOTE: Do not screw the regulator into the calibration cylinder at this time.
3. Set a voltmeter to measure in the millivolt (mV) range.
4. Remove the junction box cover, then plug the voltmeter leads into the test points on
the amplifier.
Plug the positive lead into the test point labeled TP+ ; plug the negative lead into the
test point labeled TP- .
5. 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 50% LEL and a fullscale setting of 100% LEL, the
correct output is 300 mV.
300 (mV) = (50/100) X 400 +100