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Form No. 702718 Rev. A March, 2005 97
Owner’s Manual - Regal Intensive Care Unit
7. Pull the knob off the shaft.
8. With a 1/2-in. wrench, remove the lock nut behind the
knob (Figure 109).
9. Pull out the old potentiometer and attached wires.
Installation
1. Place the new potentiometer into the electronics compart-
ment door from the rear. Note: Make sure that the three
terminals on the rear of the potentiometer are on top
(Figure 110).
2. Secure the potentiometer with the lock nut (Figure 109).
3. Replace the knob and tighten the lock screw.
Note: The three soldered wire terminals on the potentiometer are
shown in Figure 110:
Center terminal - wire goes to Terminal 1 on meter
Front terminal - wire goes to Terminal 2 on meter
Rear terminal - not used
4. Connect the wire from the center terminal
to Terminal 1 on the meter.
5. Connect the wire from the front terminal
to Terminal 2 on the meter.
6. Replace the wire tie you removed earlier.
7. Observe the meter while you turn the
calibration knob. The calibration needle
should move in response to the knob.
8. Close and secure the electronics com-
partment door.
9. Using the calibration knob, position the
calibration needle in the oxygen concentra-
tion meter to 20.5%.
10. Plug the power cord into its wall outlet.
Figure 110. Wire Terminals on the Rear
of the Potentiometer
Rear Terminal
Center
Terminal
Front
Terminal
2
1