RKI Instruments 65-2442RK - Manual (Page 15)

65-2442RK PPM Hydrogen Transmitter • 11
hub.
8. Connect the detector leads to the detector terminal strip as shown in Table 3 below
and Figure 3 on page 6 of this manual.
9. Re-install the detector terminal strip into its socket.
NOTE: When a transmitter is first powered up with a new detector, its signal will
increase rapidly over a few seconds to a high level and then the signal will
decrease so that it appears stable after a few minutes. Be sure to make
arrangements so that this does not cause unwanted alarms.
10. Turn on power to the controller.
11. Turn on the controller and place it into normal operation.
12. Allow the transmitter to run for 3 hours.
13. Make a preliminary setting of the sensor load voltage. See “Setting the Detector Load
Voltage” on page 13. This will be a temporary load voltage setting since the load
voltage will need to be set again after the burn-in period as described below.
14. Perform a preliminary calibration. See “Calibration” on page 15. This will be a
temporary calibration since the new ppm detector must burn-in before it can be
properly calibrated.
15. Allow the replacement detector to burn-in for at least 5 days before you continue with
the next step. A burn-in period of 7 days is recommended.
16. After the burn-in period, set the load voltage as described in “Setting the Detector
Load Voltage” on page 13.
17. After setting the load voltage, calibrate the transmitter as described in “Calibration”
on page 15 of this manual.
Replacing the Amplifier
If you are replacing the amplifier, it is likely that the transmitter has been off power for an
extended period. Make sure to follow the preliminary load voltage and preliminary
calibration recommendations and the burn-in period recommendation before making the
final load voltage setting and calibration.
1. Turn off power to the controller.
2. Place the controller’s on/off switch in the OFF position.
3. Remove the junction box cover.
4. Unplug the detector terminal strip and controller terminal strip from their sockets.
You may leave the wires connected to the terminal strips.
5. Unscrew and remove the screw with the flat and lock washers that secures the
Table 3:Reconnecting the PPM Detector to the Amplifier
Detector Lead
Amplifier Interconnect
Terminal Strip
Red DETECTOR “R”
White DETECTOR “W”
Black DETECTOR “B”