Start Up
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13
Start Up
This section describes procedures to start up the combustible gas transmitter and place the
transmitter into normal operation.
NOTE:
The detector must be started up in fresh air.
Introducing Incoming Power
1. Complete the installation procedures described earlier in this manual.
2. Verify that the power wiring to the controller is correct and secure. Refer to the controller
operator’s manual.
3. Turn on power to the controller.
4. Turn on the controller.
5. Verify that the controller is on and operating properly. Refer to the controller operator’s
manual.
CAUTION:
Allow the detector to warm up for 5 minutes before you continue with
the next section, “Setting the Zero Reading”.
Setting the Zero Reading
WARNING: Do not remove the junction box cover while the circuits are energized unless the
area is determined to be non-hazardous. Keep the junction box cover tightly
closed during operation.
NOTE:
If you can verify that the combustible gas transmitter is in a fresh air environment, you
do not need to apply zero air to the detector before adjusting the zero reading.
The procedure below describes applying zero emission air, usually called zero air, using a
calibration kit that includes a calibration cup, calibration gas, sample tubing, and a fixed flow
regulator with an on/off knob. RKI Instruments, Inc. recommends using a 0.5 LPM (liters per
minute) fixed flow regulator.
1. Allow the combustible detector to warm up for 2 minutes before setting the zero reading.
2. Unscrew and remove the junction box cover from the junction box.
3. Set a voltmeter to measure in the millivolt (mV) range.
4. Plug the voltmeter leads into the test points on the amplifier. Plug the positive lead into the red
(+) test point; plug the negative lead into the black (
-)
test point.
5. Screw the calibration cup onto the bottom of the MPS LEL detector.
