Triumph LS826
Brief History
After thin VFD pocket calculators, Japanese manufacturers have produced various liquid crystal displays in series, all of which are made for interfacing a domestic chip. The first Triumph-Adler machines still had a look similar to the aluminum housings of the previous series, but the new ones launched in 1980 was dominated by black color. The calculators built with NEC's new, low-power circuits, could now be switched on with a pushbutton instead of the usual slide switch; so these equipments last for 3,500 hours of use. The green plastic case could also be used as a stand. In addition to the four arithmetic operations, the L815 is capable of calculating percentages, square roots, and changing the sign; L817 can provide reciprocal values and squares, display fixed point results; the two scientific types, LS825 and LS826, had more functions than before; the only difference between them was the display format selector button, which was only implemented on the LS826.
The interesting thing about the LS825 and LS826 scientific calculators is that not all secondary functions are labeled. The missing functions are indicated by a paper label glued to the inside of the plastic case. We might think it's a mistake, but the fact that the LS828 three years later was made with the same solution.
| Manufacturer: | Triumph-Adler Vertriebs-GmbH (West-Germany) |
| Mfg. date: | 1980 |
| Size: | 6,4×13,8×0,9 cm |
| Weight (ready for operate): | n.a. |
| Type: | scientific |
| Capacity: | 8/5+2 digits (input/display) 11+2 digits (internal precision) |
| Operating logic: | algebraic |
| CPU: | NEC D1854G |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 5 bracket (with saving the pending operation) 1 memory (with aritmetic) |
| Features: | +/-change sign (direct entry of negative numbers) RVexchange registers (X-Y) Ffloating-point notation Fixfixed-point notation: the listed decimals can be chosen (0-5) Sciscientific (exponential) notation Sqrsquare root x2square pivalue of pi (3.1415..) can be recalled 1/xreciprocal trigtrigonometrical functions (sin, cos, tan and inverses: arcsin, arccos, arctan) DMS-DDconversion of decimal and sexagesimal numbers logexponential and logarithmical functions (10- and e-base) yxraising to power SDone variable statistics: calculating mean and standard deviation n!factorial |
| Display: | 8+1 digit LCD (Optrex OPT-0171) |
| Power: | 2×LR44 button cell |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.00004012 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.006880432E-70 |
LS826
Inside of the LS826
LS826 with description to secondary functions and its original box
Similar items
