Welch Allyn Grason-Stadler GSI 17 1717-9700, Service Manual

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indication, and the controls will not function. To restore
operation, the batteries must be recharged for up to 18 hours
(full charge), or AC power (mains) may be used.
If the audiometer is operated via AC power (mains) with the
rechargeable batteries in place,
some battery charging will
occur.
10.4 ALKALINE BATTERY INSTALLATION/OPERATION
For longer, continuous battery operation, such as periods 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 works the same way for the alkaline
batteries as it does for the NiCad batteries, that is, the words
LO BAT will be lit on the LCD when there are about 6 hours of
continuous battery operation available. In addition, the "sleep
mode" also works with the alkaline batteries to prolong their
useful life.
Before installing the alkaline batteries, unplug the GSI 17 from
the line power (mains). To install the alkaline batteries, first
remove the battery pack cover by removing the two screws that
hold it in place, then lift off the cover. Carefully pull the
NiCad batteries out of the pack (they are wrapped in plastic and
will come out of the pack as a single unit). Carefully
disconnect the lead wires of the NiCad batteries from the battery
compartment by disconnecting the small plug connector. You will
notice six spring mounts on the top and bottom of the battery
compartment. These are for the alkaline batteries. (See Figure
10-3 for a pictorial diagram of NiCad removal).
Before inserting the alkaline batteries into the pack, check the
label on the bottom surface of the compartment which indicates
the correct polarity (orientation) of the batteries. Put the six
batteries in,
one at a time, matching the polarity (+ or -) with
the label. Replace the battery pack cover being sure it is
positioned with the spring mounts touching the batteries. There
is only one way the cover fits correctly so that the screws are
secure.
NOTE:
If 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.