Analytical Industries AII-2000 Palm O2 Oxygen Analyzer - Manual (Page 11)

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Procedure:
1. Open the enclosure: Remove the four (4) Phillips
screws from the rear of the enclosure, FIG 1.
2. Separate the enclosure and an place it on a flat
surface, FIG 2.
3. Remove the battery: Grasp the middle of a battery
and gently pull straight up.
4. Locate the positive (+) and negative (-) terminals
on the battery.
5. Assure the battery contacts are clean.
6. Align the battery’s positive (+) terminal with the
corresponding (+) battery symbol printed on the
PCB Assembly.
7. Install the battery: Align the battery over the termi-
nal clip mounted on the PCB Assembly and press
down until the battery snaps into place, FIG 2.
8. Repeat steps 3-7 with the remaining battery.
9. Reassemble the device as shown in section 6.4
10. Calibrate, see section 4.4, the device after replacing the batteries.
6.3 Oxygen Sensor Replacement - Standard Integral Sensor
The design of the electronics is intended for only the Analytical Industries Inc.
AII-11-75-PO2 or AII-11-75-PO2R Oxygen Sensors. Use of a different oxygen
sensor may result in an erroneous oxygen reading.
NEVER - Open the oxygen sensor or probe the sensing surface, refer
to Section 10 in the event the sensor should leak and someone comes
in contact with the electrolyte from inside the sensor.
Procedure - Standard Integral Sensor
1. See 6.2 step 1 above.
2. See 6.2 step 2 above.
3. Disconnect the oxygen sensor: Press
down on the latch arm, see arrow,
and pull back on the male connector
attached to the sensor from the fe-
male connector attached to the PCB
Assembly, FIG 3.
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4. Remove the oxygen sensor, FIG 4:
(a) Lift up the rear of the sensor where
the connector wires are attached.
(b) Pull the front end of the sensor out
of the retaining collar, arrow right,
molded into the gasket that seals the
two sections of the enclosure.
5. Install the new oxygen sensor:
(a) Align the rear of the sensor as shown
in FIG 5, but do not install.
(b) Insert the sensor into the molded collar, arrow
FIG 6, and align the outer shoulder with the front edge of the collar.
(c) Locate the registration peg indicated by the arrow circled in FIG 5.
(d) Gently press the hole where the wires exit the sensor onto the
registration peg, FIG 5.
6. Connect the sensor, reverse section step 3.
7. Reassemble the device as shown in section 6.4.
8. Calibrate, see section 4.4, the device after replacing
the sensor.
6.4 Reassembly
To ensure proper operation after replacing the sensor or
batteries check the following points:
1. The batteries are secured in the terminal clip.
2. The sealing gasket is registered onto the 4 pegs molded into the
bottom section of the enclosure.
3. The sensor is registered as shown in FIG 5 and FIG 7 and the connecting
wires are not bent or bound when closing up the enclosure and tightening
the Phillips screws, FIG 6.
FIG 7
FIG 1
FIG 2
FIG 3
FIG 5
FIG 4
FIG 6