Welch Allyn AM 232 Manual Audiometer - User Manual - Manual (Page 23)

23 12-16-08
Alkaline battery installation/operation
For longer continuous battery operation, such when recharging on a regular basis is
not possible, the rechargeable batteries can be replaced with six size C alkaline
batteries. These batteries will provide about 45 hours of continuous operation.
The low voltage indicator operates the same way for alkaline batteries as it does for
NiCad batteries. The words LO BAT appears on the LCD when about 6 hours of
continuous battery operation remains. In addition, the “sleep mode” also works with
the alkaline batteries to prolong their useful life.
To install the alkaline batteries, refer to figures 2, 3 and 4 on the previous page, and
proceed as follows:
1. Unplug the AM 232 Manual Audiometer from the line power (mains).
2. Remove the two screws on the battery pack cover and lift off the cover.
3. Pull the NiCad battery out of the pack. The battery is actually a set of 6 batteries
wrapped in plastic, but they will be removed as a single unit.
4. Carefully disconnect the lead wires of the NiCad battery from the battery compart-
ment by removing the small connector.
5. Remove the NiCad pack.
6. There are six spring mounts on the top and bottom of the battery compartment to
hold the alkaline batteries and the label on the bottom surface of the compartment
indicates the correct position for each battery. Place each one of the six batteries
into the pack matching the polarity ( + or - ) as shown on the label.
7. Replace the battery pack cover. Make sure the cover is positioned such that the
spring mounts touch the batteries. There is only one way that the cover can be
replaced and the screws tightened. Note that the screw housing is longer on one
end. Orient the top so that it will sit flat on top of the battery compartment and
replace screws.
Note: If the alkaline batteries are not going to be used on a regular basis, they
should not be stored in the audiometer. They should be removed from the battery
pack and stored in a cool, dry place.