Silver-Reed SR 83
Brief History
The Silver-Reed SR 83 scientific calculator is a unique spot in Silver Seiko's product range, with its distinctive appearance. The original is Omron’s 86SR model, which was produced for the Australian subsidiary of General Electric with a slightly redesigned exterior (CE 90). The latter only differs from the Silver-Reed version in its labeling, as the SR 83 was made exclusively for distribution in Germany, so the labels near the display window are in German. The calculator built around General Instrument's CF596 chip — unlike contemporary models with similar layout— is also capable of handling exponential notation, so — with the exception of its keyboard layout — it is a full-fledged scientific calculator.
| Manufacturer: | Silver Seiko International (Japan) |
| OEM: | Omron Tateisi Electronics Co. (Japan) |
| OEM model: | 86SR |
| Mfg. date: | 1975 |
| Size: | 7,8×15,5×2,4 cm |
| Weight (ready for operate): | n.a. |
| Type: | scientific |
| Capacity: | 8/5+2 digits (input/display) 8+2 digits (internal precision) |
| Operating logic: | algebraic |
| CPU: | General Instrument CF596 |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 1 memory (with aritmetic) |
| Features: | Ffloating-point notation Sciscientific (exponential) notation Sqrsquare root pivalue of pi (3.1415..) can be recalled 1/xreciprocal trigtrigonometrical functions (sin, cos, tan and inverses: arcsin, arccos, arctan) logexponential and logarithmical functions (10- and e-base) |
| Display: | 9 digit VFD (Itron DP95AL) |
| Power: | 2×AA battery or adaptor |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 67.497 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 - |
SR 83
Inside of the SR 83
Keyboard of the SR 83
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