Instruction manual

DRY BATTERY OPERATION
Two AA size manganese dry batteries (UM-31 give approximately 8 hours
continuous operation (16 hours on type SUM-31. When battery power de-
creases, the whole display darkens. Batteries should then be renewed.
Switch OFF the power, slide
open the battery compartment lid on the back
of the unit, remove dead batteries and insert new batteries with polarity as
indicated.
* Be sure to replace both batteries.
* Never leave dead batteries in the battery box as they may cause malfunc-
tions.
* It is recommended that batteries be replaced once a year to prevent the
chance
of malfunctions due to battery leakage.
AC OPERATION
Use only an adaptor with the same voltage rating (100, 117, 220 or 240VI as
your
power supply to prevent component damage. Plug the AC adaptor into .
the AC outlet and cord into the unit, this automatically cuts off battery power
supply.
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