Technical Datasheet ETR Soemtron 220
The ETR "Soemtron 220" is a fully transistorized four-function calculator
with ferrite core memory, input keyboard and digitizer tubes for the
value display.
1. Size :
Width: 380 mm
Length: 464 mm
Height: 194 mm
2. Mass :
15 kg
3. Operating voltage :
220 V +I0 % ) 50Hz
— 15 % )
110 V +I0 % ) 50Hz
— 15 % )
4. Input power :
50 VA
5. Clock speed :
25 kHz
6. Capacity :
Input
)
Display
) 15 digits
Calculation register ) plus
Memory
) sign
7. Computing time :
Addition
) 5 ms
Subtraction
)
Multiplication
) average 0,5 s
Division
)
8. Number of calculation
3 Calculation register
and storage registers :
1-3 storage memories
9. Type of entry :
Number keys
10. Type of display :
Numeric display tubes
11. Function facilities :
Addition
Subtraction
Multiplication
Division
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