Sharp EL-531GH
Brief History
Scientific calculators designed for educational market became more powerful due to competition, so in the earlier years of 1990s, Sharp decided to make a new EL-531 version used a simplified variation of the AER system, which make possible of entering expressions in the same way as written on paper. The new EL-531G (button cells), EL-531GH (AA batteries) models were built from 1992, and used the new Direct Algebraic Logic (DAL) system, which displays only the last pending operation, make more difficult to check longer expressions. Casio skipped this step in the evolution of the fx-82 series, and introduced the full-function formula processing capability with two-line display in the second half of the 1990s.
| Manufacturer: | Sharp Corporation (Japan/China) |
| Mfg. date: | 1992-95 |
| Size: | 7,7×15,7×2 cm |
| Weight (ready for operate): | 133 g |
| Type: | scientific |
| Capacity: | 10/10+2 digits (input/display) 12+2 digits (internal precision) |
| Operating logic: | formula-interpreting |
| CPU: | SHARP LI350422 |
| Registers: | 2 standard (with saving the pending operation) 16 bracket (with saving the pending operation) 1 memory (with aritmetic) |
| Features: | %calculation with percent +/-change sign (direct entry of negative numbers) Ffloating-point notation Fixfixed-point notation: the listed decimals can be chosen (0-9) Sciscientific (exponential) notation Engengineering notation a b/callows entry and display of fractions BSbackspace (right-shift) function Sqrsquare root x2square pivalue of pi (3.1415..) can be recalled 1/xreciprocal trigtrigonometrical functions (sin, cos, tan and inverses: arcsin, arccos, arctan) hyphyperbolic functions (sinh, cosh, tanh and inverses: ar sinh, ar cosh, ar tanh) 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 nCrprobability calculations P-Rconverting coordinates between rectangular and polar systems n!factorial |
| Display: | 10+2+2 digit LCD |
| Power: | 2×AA-type battery |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.0000006699 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.00688090276E-70 |
EL-531GH
Inside of the EL-531GH
Inside of the EL-531GH
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