Suburban Mfg REGAL INTENSIVE CARE UNIT 12019-01-NGFREP - Manual (Page 108)

96 SSCI - Suburban Surgical Company, Inc.
Chapter 5 - Repairs & Replacements
Potentiometer,
Calibration
P/N 853397
The potentiometer operates the calibration needle in the oxygen
concentration meter, and is located behind the calibration knob.
CAUTION: Before proceeding, make sure the unit is
Off, and the electric power cord un-plugged.
Tools and Supplies Required
„ Flat-blade screwdriver
„ Small flat-blade screwdriver
„ 1/2-in. wrench
„ Utility knife or small wire cutter
„ Small wire tie
Figure 108. Rear View of Calibration
Potentiometer
Oxygen
Conc.
Meter
Potentiometer Wire Tie
Terminal 2
Terminal 1
Figure 109. Calibration Potentiometer
Lock Nut (Knob Removed)
Lock Nut
Potentiometer Stem
Removal
1. Make sure that the main on/off switch is
Off and the amber light in the switch is out.
2. Unplug the power cord from the electrical
outlet.
3. Open the electronics compartment (refer
to Page 57).
Note: Terminal numbers are displayed on the rear
of the oxygen concentration meter by molded-on,
raised numbers. Also, a label showing terminal
numbers is affixed to the top of the body of the
meter.
4. Two wires lead from the potentiometer to
Terminals 1 and 2 on the oxygen concen-
tration meter (Figure 108). Dis-connect
both wires from the meter. Do not disturb
the other wires on the terminals.
5. Cut and remove the wire tie holding the
two wires to the wire bundle going to the
meter.
6. With a small flat-blade screwdriver, loosen
the lock screw on the side of the knob
(Figure 107).