1. Introduction
This manual provides detailed instructions for the proper use and maintenance of your Sharp EL-520TG scientific calculator. The EL-520TG is designed for a wide range of mathematical and scientific calculations, featuring Direct Algebraic Logic (D.A.L.) for intuitive input, 419 functions, and 9 memory registers. Please read this manual thoroughly to ensure optimal performance and longevity of your device.
Image 1.1: Sharp EL-520TG Scientific Calculator, shown with its protective case and a premium warranty card.
2. Setup
2.1. Power Source
The Sharp EL-520TG calculator is battery-powered. Ensure fresh batteries are installed for reliable operation. Refer to the battery compartment on the back of the unit for battery type and installation instructions.
2.2. Initial Power On
Press the ON/C key to power on the calculator. The display should show '0' or a previous calculation result. If the display is blank or dim, replace the batteries.
Image 2.1: Front view of the Sharp EL-520TG Scientific Calculator, displaying its keypad and screen.
3. Operating Instructions
3.1. Basic Operations
- Power ON/OFF: Press ON/C to turn on. Press 2nd F then OFF to turn off.
- Number Entry: Use the numeric keys (0-9) and the decimal point key (.) to enter numbers.
- Arithmetic Operations: Use +, -, ×, ÷ for addition, subtraction, multiplication, and division. Press = to execute.
- Clear Entry: Press ON/C to clear the current entry.
- Delete: Use the DEL key to delete the last entered digit.
3.2. Functions
The EL-520TG features 419 functions, accessible directly or via the 2nd F key for secondary functions printed above the keys.
- Direct Algebraic Logic (D.A.L.): Input calculations as they are written, following standard mathematical order of operations.
- Trigonometric Functions: Use sin, cos, tan for sine, cosine, and tangent. Use 2nd F then sin⁻¹, cos⁻¹, tan⁻¹ for inverse trigonometric functions.
- Logarithmic Functions: Use log for common logarithm (base 10) and ln for natural logarithm (base e).
- Memory Functions: The calculator has 9 memory registers. Use STO to store a value and RCL to recall a stored value.
- Statistical Functions: Access statistical modes via MODE. Calculate standard deviation and other statistical values.
- Power and Root Functions: Use x² for square, √ for square root, and yˣ for general powers.
3.3. Display Modes
Adjust the display format using the SET UP menu.
- FIX: Specifies the number of decimal places.
- SCI: Displays results in scientific notation.
- ENG: Displays results in engineering notation.
- DEG/RAD/GRAD: Selects the angle unit (degrees, radians, or gradians).
4. Maintenance
4.1. Cleaning
Wipe the calculator's exterior with a soft, dry cloth. Do not use abrasive cleaners or solvents, as they may damage the casing or display.
4.2. Battery Replacement
When the display becomes dim or calculations are erratic, it is time to replace the batteries. Refer to the battery compartment cover for the correct battery type and polarity. Ensure the calculator is turned off before replacing batteries.
4.3. Storage
Store the calculator in a cool, dry place, away from direct sunlight and extreme temperatures. Use the provided protective case to prevent scratches and damage to the keys and display.
Image 4.1: The Sharp EL-520TG calculator securely stored within its protective case.
Image 4.2: The black protective case, designed to safeguard the Sharp EL-520TG calculator.
5. Troubleshooting
- Blank or Dim Display: Check battery installation. Replace batteries if necessary.
- Incorrect Results: Verify the input values and the selected mode (e.g., DEG/RAD). Ensure all previous calculations are cleared.
- Calculator Not Responding: Try pressing the RESET button (usually a small button on the back, requiring a thin object like a paperclip to press). This will clear all memory and settings.
- Error Messages: Consult the full product manual for specific error code meanings. Common errors include 'ERROR' for mathematical impossibilities (e.g., division by zero) or 'OVERFLOW' for results exceeding the calculator's capacity.
6. Specifications
| Brand | Sharp |
| Model | EL-520TG |
| Calculator Type | Scientific / Engineering |
| Functions | 419 |
| Memory Registers | 9 |
| Input Logic | Direct Algebraic Logic (D.A.L.) |
| Power Source | Battery Powered |
| UPC | 634397960069 |
7. Warranty and Support
This product includes a premium warranty extension. Please refer to the warranty card for specific terms, conditions, and duration of coverage. Keep your proof of purchase for any warranty claims.
Image 7.1: The Premium Warranty card provided with the product.
For technical support or further assistance, please contact the retailer or refer to the official Sharp support channels. Detailed contact information is typically available on the product packaging or the manufacturer's website.
