12 • 65-2462RK Hydrogen Transmitter
Start Up
This section describes procedures to start up the hydrogen transmitter and place the transmitter into
normal operation.
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 Signal”.
Setting the Zero Signal
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.
CAUTION:
If you suspect the presence of hydrogen in the monitoring environment, use the
calibration kit and the zero air calibration cylinder to introduce “fresh air” to the
detector and verify an accurate zero setting. See “Calibration” on page 16 for
instructions to apply zero air when setting the zero signal.
As shipped from the factory, the detector is zeroed with N
2
and calibrated with H
2
in N
2
. If the sample
area has a background that is not N
2
(such as fresh air or helium), you must rezero the detector while
applying that background gas.
1. Screw the calibration cup onto the bottom of the detector.
2. Use the sample tubing to connect the regulator to the calibration cup.
3. Screw the regulator into a cylinder into a calibration cylinder containing the background gas (such
as zero air or helium).
4. Unscrew and remove the junction box cover from the junction box.
5. Set a voltmeter to measure in the millivolt (mV) range.
6. 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.
7. Turn the regulator knob counterclockwise to open the regulator.
8. Allow the calibration gas to flow for one minute.
9. Verify a voltmeter reading of 100 mV (±2 mV).
