Analytical Industries AII-2000 M Oxygen Analyzer - Manual (Page 14)

5.4.3 AII 2000HC Oxygen Analyzer (Integral Oxygen Sensor)
AII 2000HC with its integral oxygen sensor requires connecting the ¼” tubing
supplied (section 4.2.1 above) with the device to a ¼” hose barb attached to a
pressure regulator controlling a source of gas flowing at less than 10 liters per
minute.
5.5 Alarms (AII 2000M Oxygen Monitor):
The monitor is equipped with user selectable HI and LO alarm set points which
are displayed at the bottom of the LCD. Section 4.6 describes the operation
and procedure for setting the alarms in detail.
6 Maintenance
Review Section 3 Safety Warnings and Section 7 Troubleshooting for
guidelines on servicing the devices.
6.1 Serviceability
Do not open the main compartment of the analyzer, as it contains no service-
able parts inside. Never attempt to repair the analyzer or sensor by yourself as
you may damage the analyzer which could void the warranty.
6.1.2 Cleaning / Reuse Instructions
Clean the device, oxygen sensor and accessories with a soft cloth dampened
with either water or mild isopropyl alcohol solution (70% isopropyl alcohol
solution in water), if necessary, before re-use. Allow the components to air-dry
after cleaning.
Note: The Home Care Kit is not intended for patient use, it is intended solely
for confirming the O
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concentration in Oxygen Concentrators. Accordingly, no
cleaning instructions apply.
6.2 Battery Replacement
The analyzers and monitor are powered by two AA alkaline batteries with an
approximate life of 1,200 hours. A low battery indicator circuit monitors the
battery supply voltage and sends a signal directly to the LCD when the battery
voltage reaches a preset level that activates the battery symbol in the LCD.
The batteries are housed in a separate compartment located at the rear of the
device and are accessible by sliding the removable cover.
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Initially this procedure can be somewhat difficult. Care should be taken
not to damage the case when removing the battery compartment cover.
6.2.1 Procedure:
1. Turn the device over so the
shortest raised line on the battery
compartment cover is pointing
away from you.
2. Lift the tripod wire stand up and
away from the case.
3. Grasp the case with both hands
and using your thumbs press
down firmly on the raised lines and push the battery compartment cover
away from you.
4. Locate the positive (+) and negative (-) terminals on the battery.
5. Assure the battery contacts are clean.
6. Align one battery’s positive (+) terminal with the corresponding (+) bat-
tery symbol molded into the case.
7. Insert the battery into the compartment.
8. Repeat with the remaining battery.
9. Replace the battery compartment cover, make sure it snaps into position
and is secured flush against the case. Replace the wire stand as required.
10. Calibrate the device after replacing the batteries.
6.3 Oxygen Sensor Replacement
The design of the electronics is intended for only the Analytical Industries Inc.
AII-11-60 or AII-11-60-HC 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.
6.3.1 Procedure AII 2000M and AII 2000A - External Sensor
1. Disconnect the cable from the old sensor just as you disconnect a tele-
phone jack from a wall plug.
2. To connect the new sensor simply find and register the male plug at the
end of the coiled cable and insert it into the mating female jack at the rear
of the sensor until it mates or snaps into place.
3. Calibrate the device after replacing the oxygen sensor.
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