Introduction
This manual provides instructions for operating the Sharp EL-520X scientific calculator. Keep it handy for future reference.
General Notes
- The EL-520X uses ALGEBRAIC (DAL) and ALGEBRAIC (ALPHA) systems.
- The calculator automatically selects the correct calculation method.
- Pressing [ON/C] clears the display and calculation.
- Pressing [2ndF] activates secondary functions.
- Pressing [ALPHA] activates alpha functions.
- The calculator has a 10-digit mantissa and 2-digit exponent.
- The display shows symbols for various modes and states.
Key Notations Used in This Manual
Keys are shown as they appear on the calculator (e.g., [ON/C], [2ndF], [ALPHA]).
Operation
- Power ON/OFF: Press [ON/C] to turn on. Press [2ndF] then [OFF] to turn off.
- Clearing the Display: Press [ON/C] to clear the display and calculation.
- Mode Selection: Press [MODE] to select calculation modes (NORMAL, STAT, A.CALC, EQN).
- Angle Unit Selection: Press [DRG] to cycle through DEG (degrees), RAD (radians), GRAD (gradians).
- Decimal Point Selection: Press [SET UP] then [0] to select FIX, SCI, or ENG notation.
- Correction: Use [◀] and [▶] to move the cursor. Press [DEL] to delete a character. Press [INS] to insert.
- Multi-line Playback: Press [▲] or [▼] to recall previous calculations.
- Equation Editor: Press [▲] or [▼] to edit equations.
Priority Levels in Calculations
The calculator performs operations according to a fixed priority sequence: 1. Functions with arguments (e.g., sin, cos), 2. Power/Root, 3. Multiplication/Division, 4. Addition/Subtraction. Parentheses override this order.
Initial Setup
To reset the calculator to its initial settings, press [2ndF] then [M-CLR] then [0] then [0].
Mode Selection
- NORMAL Mode (NORMAL): For general calculations.
- STAT Mode (STAT): For statistical calculations.
- A.CALC Mode (A.CALC): For simulation calculations.
- EQN Mode (EQN): For solving equations.
Basic Operations
Number Entry and Basic Arithmetic
Numbers are entered directly. Basic operations (+, -, ×, ÷) are performed as usual. Press [=] to execute.
Decimal Point and Scientific Notation
The calculator supports floating decimal point and scientific notation (e.g., 1.23E+05 for 1.23 × 10^5).
Angle Unit Conversion
Conversions between degrees, radians, and gradians are supported using [DRG].
Random Numbers
Press [2ndF] then [RANDOM] to generate a random number between 0 and 0.999.
Memory Calculations
Independent Memory (M+, M-, RM, CM)
The independent memory stores a single value. Use [M+] to add to memory, [M-] to subtract, [RM] to recall, and [CM] to clear.
Temporary Memory (A-F, X, Y)
The calculator has several temporary memories (A-F, X, Y) for storing values. Use [STO] to store and [RCL] to recall.
Scientific Calculations
Scientific Functions
The calculator supports a wide range of scientific functions including trigonometric (sin, cos, tan), inverse trigonometric (sin⁻¹, cos⁻¹, tan⁻¹), logarithmic (log, ln), exponential (e^x, 10^x), power (x^y), root (√x, ∛x), factorial (x!), permutations (nPr), combinations (nCr), and fractions.
Multi-line Playback Functions
The calculator stores up to 142 characters of calculation data. Use [▲] and [▼] to scroll through previous entries.
Equation Editor
The equation editor allows input and display of equations in a natural textbook format. Use [◀] and [▶] to navigate within the equation.
Complex Numbers
The EL-520X can perform calculations with complex numbers. Press [MODE] then [1] to enter complex number mode. Use [a+bi] to input complex numbers.
Integration and Differentiation
The calculator supports numerical integration (∫) and differentiation (d/dx) functions.
Statistical Calculations
Press [MODE] then [STAT] to enter statistical mode. Select the type of statistical calculation (e.g., single variable, linear regression).
Statistical Data Entry
Enter data points using [DATA]. Use [CD] to clear data.
Statistical Calculation Formulas
The manual provides formulas for various statistical calculations including mean, standard deviation, sum of squares, sum of products, etc.
Simultaneous Linear Equations
The calculator can solve simultaneous linear equations with two or three unknowns. Press [MODE] then [EQN] to select.
Regression Calculations
The calculator supports various regression models (linear, quadratic, exponential, logarithmic, power, inverse). After entering data, various regression coefficients and estimated values can be calculated.
Solver Function
The solver function can find the value of a variable in an equation. Input the equation, specify the variable to solve for, and provide an initial guess.
Simulation Calculation (A.CALC)
The A.CALC mode allows for simulation calculations by assigning values to variables and observing the results. This is useful for analyzing how changes in input variables affect an output.
Error Codes and Error Types
The calculator displays error codes when an invalid operation is performed. Common errors include:
- ERROR 01 (Syntax Error): Incorrect expression.
- ERROR 02 (Calculation Error): Result exceeds calculation range.
- ERROR 03 (Memory Error): Insufficient memory.
- ERROR 04 (Data Error): Invalid data input for statistical calculations.
- ERROR 05 (Overflow Error): Result too large.
- ERROR 06 (Underflow Error): Result too small.
- ERROR 07 (Equation Error): Invalid equation for solver.
- ERROR 08 (Time Out Error): Calculation took too long.
Notes on Battery Replacement
The calculator uses a single lithium battery (CR2032). When the display becomes dim or calculations are incorrect, replace the battery. Ensure the calculator is off before replacement. Dispose of old batteries properly.
Specifications
- Power Source: Lithium battery (CR2032 × 1)
- Operating Time: Approx. 2,000 hours (continuous display of 55555.)
- Automatic Power Off: Approx. 10 minutes.
- Dimensions: 79.6 mm (W) × 154.5 mm (D) × 13.2 mm (H)
- Weight: Approx. 97 g (including battery)
- Accessories: Battery (installed), operation manual.
For More Information About Sharp Products
Visit the Sharp website for additional product information and support.
Calculation Examples
This section provides numerous examples demonstrating the calculator's functions. Examples cover:
- Arithmetic Operations: Basic addition, subtraction, multiplication, division, and mixed operations.
- Scientific Functions: Trigonometric calculations (sin, cos, tan), inverse trigonometric functions, logarithms (log, ln), exponentials, powers, roots, factorials, permutations, and combinations.
- Memory Calculations: Storing and recalling values from independent and temporary memories.
- Statistical Calculations: Data entry, mean, standard deviation, and various regression analyses (linear, quadratic, etc.).
- Complex Number Calculations: Operations with complex numbers in rectangular and polar forms.
- Integration and Differentiation: Numerical integration and differentiation of functions.
- Equation Solving: Using the solver function to find unknown variables in equations.
- Simulation Calculations: Applying the A.CALC mode to observe variable relationships.
- Physical Constants and Metric Conversions: Utilizing built-in constants and conversion factors.
Each example provides the key presses and the expected result, illustrating practical applications of the calculator's features.
Physical Constants
| No. | Symbol | Value | Unit |
|---|---|---|---|
| 01 | c | 2.99792458 × 10^8 | m/s |
| 02 | μ0 | 4π × 10^-7 | N/A^2 |
| 03 | ε0 | 8.854187817 × 10^-12 | F/m |
| 04 | e | 1.60217733 × 10^-19 | C |
| 05 | me | 9.1093897 × 10^-31 | kg |
| 06 | mp | 1.6726231 × 10^-27 | kg |
| 07 | mn | 1.6749286 × 10^-27 | kg |
| 08 | h | 6.6260755 × 10^-34 | J·s |
| 09 | NA | 6.0221367 × 10^23 | mol⁻¹ |
| 10 | k | 1.380658 × 10^-23 | J/K |
| 11 | R | 8.314510 | J/(mol·K) |
| 12 | F | 9.6485309 × 10^4 | C/mol |
| 13 | G | 6.67259 × 10^-11 | N·m^2/kg^2 |
| 14 | g | 9.80665 | m/s^2 |
| 15 | atm | 101325 | Pa |
| 16 | π | 3.141592653589793 |
Metric Conversions
| No. | Unit | Conversion | Unit |
|---|---|---|---|
| 01 | in | 2.54 × 10^-2 | m |
| 02 | cm | 1 × 10^-2 | m |
| 03 | m | 1 | m |
| 04 | km | 1 × 10^3 | m |
| 05 | mile | 1.609344 × 10^3 | m |
| 06 | n mile | 1.852 × 10^3 | m |
| 07 | yd | 0.9144 | m |
| 08 | ft | 0.3048 | m |
| 09 | μm | 1 × 10^-6 | m |
| 10 | nm | 1 × 10^-9 | m |
| 11 | Å | 1 × 10^-10 | m |
| 12 | L | 1 × 10^-3 | m^3 |
| 13 | gal (US) | 3.785411784 × 10^-3 | m^3 |
| 14 | gal (UK) | 4.54609 × 10^-3 | m^3 |
| 15 | oz (US) | 2.95735295625 × 10^-5 | m^3 |
| 16 | oz (UK) | 2.84130625 × 10^-5 | m^3 |
| 17 | lb | 0.45359237 | kg |
| 18 | oz | 2.8349523125 × 10^-2 | kg |
| 19 | ton (US) | 9.0718474 × 10^2 | kg |
| 20 | ton (UK) | 1.0160469088 × 10^3 | kg |
| 21 | dyn | 1 × 10^-5 | N |
| 22 | kgf | 9.80665 | N |
| 23 | lbf | 4.4482216152605 | N |
| 24 | J | 1 | J |
| 25 | cal (IT) | 4.1868 | J |
| 26 | cal (15°C) | 4.1855 | J |
| 27 | cal (th) | 4.184 | J |
| 28 | erg | 1 × 10^-7 | J |
| 29 | eV | 1.60217733 × 10^-19 | J |
| 30 | kWh | 3.6 × 10^6 | J |
| 31 | hp | 7.4569987158227 | W |
| 32 | PS | 7.3549875 × 10^2 | W |
| 33 | atm | 1.01325 × 10^5 | Pa |
| 34 | mmHg | 1.33322387415 × 10^2 | Pa |
| 35 | psi | 6.894757 × 10^3 | Pa |
| 36 | °F | (5/9)·(°F-32) | °C |
| 37 | °C | (9/5)·°C+32 | °F |
| 38 | K | K-273.15 | °C |
| 39 | °C | °C+273.15 | K |
