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Appendix
Procedures for
replacing unit
operation
batteries
Replacing the
memory backup
battery
Note:
160
When battery power becomes low, a
message will show indicating that a
new set of batteries are needed.
1. Turn off the calculator's power
(@ o).
2. Turn over the calculator.
Locate the battery compart-
ment cover, and open the
cover as illustrated.
3. Replace all four AAA
batteries as illustrated.
4. Replace the battery compartment cover.
The following message will appear.
If the message does not appear,
repeat the procedures from step 2.
5. Press O.
C
C
Do not press C
C
C . This will clear all the data.
Once every 5 years, the lithium battery will need to be replaced.
The lithium battery is used to maintain the memory of the
calculator.
Do not remove the lithium battery while the unit operation
batteries are removed; otherwise all the calculator's stored
memory will be lost.
2
1
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