This is an electronic calculator that can perform four basic calculations and provide memory function
This manual introduces the Casio H-1 electronic calculator, covering safety precautions, key functions, and basic operation. It explains the power switch, read‑out display, numeral entry, function keys, memory operations, percentage, square‑root, and overflow handling.
The guide details battery maintenance, describing dry AA manganese batteries (UM‑3) that give about 8 hours of continuous use and the optional AC adaptor that automatically disables the batteries. A specifications section lists the calculator’s 8‑digit capacity, Digitron tube display, floating decimal point, overflow indicator, power consumption of 0.2 W, and main component (one chip LSI).
| Basic calculations | Four basic calculations |
|---|---|
| Capacity | 8 digits including minus sign |
| Read‑out | Digitron tube panel |
| Decimal point mode | Full floating (or fixed with cut‑off/round‑off at 2 decimals) |
| Overflow indication | ‘E’ sign locks the calculator |
| Main component | One chip LSI |
| Power consumption | 0.2 W |
| AC power source | 100‑240 V, 50/60 Hz |
| DC power source | Two AA size manganese dry batteries (UM‑3) |
Two AA size manganese dry batteries (UM‑3) give approximately 8 hours of continuous operation (16 hours with type SUM‑3).