Instruction 3015-5506
3
4. To remove the old IR bench:
a. Pull the 10-pin and 12-pin electrical connectors from their respective sockets on the IR bench.
Note that these connectors may have been secured with either hot glue or cable ties for
shipping purposes. As necessary, carefully remove anything securing the connector then
remove the connector.
b. Pull the tubing from the gas-inlet and outlet fittings on the IR bench.
c. Using wire cutters, cut the two cable ties that secure the IR bench to the enclosure, then
remove the bench from the monitor.
Installing the New IR Bench
5. Perform the following to install the new IR bench:
a. Remove protective caps from the gas-inlet and gas-outlet fittings on the new IR bench.
b. Position the new bench inside the enclosure so that the end with the 12-pin electrical connector (IR
Source) is located on the
right
and that the gas fittings are facing towards the monitor’s main board.
c. Using the two cable ties supplied in the kit, secure the bench to the cable-tie mounts on the side wall
of the enclosure. Cut off any cable-tie excess.
d. Connect tubing from pump to the IR bench gas-outlet fitting, and connect tubing from purge valve V1
to the IR bench gas-inlet fitting.
e. Plug the 12-conductor ribbon cable from IR SOURCE connector J5 on the main board into the 12-pin
IR bench connector.
f. Plug the 10-conductor ribbon cable from DET connector J6 on the main board into the 10-pin IR bench
connector.
6. Check to ensure that the new IR bench is properly secured, and that all tubing and electrical connectors
are tight.
7. Turn ON the monitor’s AC circuit breaker.
Single Zone Monitors
This section describes how to proceed if installing a new IR bench in a
Single Zone Monitor
.
Adjusting IR Bench Emitter Drive Power Level
1. To adjust the IR emitter power level:
a. With the monitor in its MEASURE (normal) mode, enter the main menu and use the keypad buttons to
place the arrow (>) on the display next “CAL.”
b. Press the Right-Arrow and ENTER buttons
at the same time
to display the revision screen.
c. Press “QUIT” to display the setup screen.
d. Place the arrow (>) next to the “IR” and press “ENTER.”
e. Change the IR emitter drive level to 450 mW by using the UP/DOWN arrow keys (newer models). If
present, change the drive level to 450 mW by adjusting R37 (located on main PCB board) clockwise
(older models).
f. Press “SILENCE/QUIT” to return to the setup screen.
