12 • 65-2443 PPM Hydrogen Transmitter
Start Up
This section describes procedures to start up the ppm 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.
NOTE:
When a transmitter is first powered up after installation or being off power for an extended
period, its output may be high enough to cause an alarm or low enough to indicate a failure
for a brief period before stabilizing within a few minutes. Be sure to make arrangements so
that this does not cause unwanted alarms.
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.
Transmitter Burn-In Period
Once power has been applied to the transmitter, it will take several days for the transmitter signal to the
controller to stabilize completely. This is the burn-in period. The zero reading should settle down close
to zero within 2-3 hours of applying power. The transmitter should be burned in for 5-7 days for a
stable zero and accurate response to gas. The transmitter is calibrated at the factory before shipment
and it is not necessary to calibrate the transmitter after startup. If calibration of the transmitter after
startup is desired, wait at least 5 days after startup before calibrating the transmitter. A burn-in period
of 7 days is recommended. See page 16 for calibration instructions.
Setting the Zero Signal
The detector’s zero setting is controlled by electronics and is not user-adjustable.
