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PART 7 Technical Reference
E
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Specifications
Model: SF-4990/SF-6990/SF-7990
Main Modes:
Telephone Directory 1, 2, Memo, Schedule Keeper, To Do, Expense, Anniver-
sary, Calendar, Home Time, World Time, Calculator, Currency Conversion and
Metric Conversion.
Data storage:
Storage and recall of telephone, memo, schedule, to do, expense, anniversary
data; calendar display; secret memory area; editing; memory status display
Clock:
Home Time, World time 1, 2; schedule alarm; daily alarm; accuracy under normal
temperatures: average ± 3 seconds per day
Calculation:
10-digit arithmetic calculations; arithmetic constants (+, , ×, ÷); independent
memory; percentages; 20-digit approximations; other mixed calculations
General:
Display element: 17-column × 6-line LCD
Memory capacity: SF-4990: 256KB
SF-6990: 512KB
SF-7990: 1MB
Main component: LSI
Power supply: 2 lithium batteries (CR2032)
Power consumption: 0.1W
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