Introduction
This manual provides detailed instructions for the SHARP EL-5160T-X scientific calculator, an expert model designed for advanced mathematical and scientific calculations. It features 710 functions, a formula memory for frequently used calculations, and a clear display with expression input capabilities. Please read this manual thoroughly to ensure proper use and to maximize the calculator's potential.

Image: The SHARP EL-5160T-X scientific calculator, black in color, shown at an angle with its display and keypad visible.
Setup
Power Source
The EL-5160T-X calculator operates on both solar power and a single alkaline button battery (included). The solar panel provides power in well-lit environments, while the battery ensures operation in low-light conditions.
Initial Use
- Unpacking: Carefully remove the calculator from its packaging.
- Power On: Press the ON/C key to turn on the calculator. If the display does not appear, ensure sufficient lighting for the solar panel or check the battery.
- Display Adjustment: If the display contrast is not optimal, refer to the "Display Settings" section in the full manual for adjustment instructions.
Operating Instructions
General Calculation
Perform basic arithmetic operations using the number keys and operator keys (+, -, ×, ÷). Press = to display the result.
Formula Memory Function
The formula memory function allows you to register frequently used calculations and formulas. These can then be recalled and executed quickly, saving time for repetitive tasks.

Image: A close-up of the calculator display showing "数式記憶機能" (Formula Memory Function) and the F1, F2, F3, F4 keys used for memory registration and recall.
To use: Press the SETUP key, then select the memory function. Use keys like F1 to F4 to store and retrieve formulas. Refer to the full manual for detailed steps on registering and recalling formulas.
Japanese Display
The EL-5160T-X calculator supports displaying mode selections and settings in Japanese, which can improve user comprehension and ease of navigation for Japanese speakers. You can switch between Japanese and English display languages.

Image: The calculator display showing "日本語表示" (Japanese Display) with menu options in Japanese, and below it, the same menu in English, demonstrating the language switch feature.
To switch display language: Access the MODE settings and navigate to the language option. Select your preferred language (Japanese or English).
Expression Input Display
This feature allows you to input and display complex mathematical expressions exactly as they are written in textbooks. This includes fractions, square roots, and pi, making it easier to verify input and understand results.

Image: The calculator display showing "式通り入力表示" (Expression Input Display) with an example of a complex fraction and square root expression input, and its calculated result displayed in a similar format.
The display of calculation results can be chosen between fractional/square root/pi forms and decimal forms, depending on the usage scenario.
CHANGE Key
The CHANGE key provides a convenient way to convert calculation results that include fractions or square roots into their numerical (decimal) equivalents with a single press.

Image: The calculator display illustrating the use of the CHANGE key, showing a result in fractional/square root form being converted to its decimal equivalent with a single press.
This function is particularly useful for trigonometric calculations, four-arithmetic operations involving square roots, and memory calculations.
HOME Key
The HOME key allows you to quickly return to the initial screen of the general calculation mode from any other mode with a single press, streamlining navigation.

Image: The calculator display showing a complex number calculation result, and an arrow pointing from the HOME key to the general mode initial screen, demonstrating its function.
Acrylic Panel
The calculator is equipped with a clear acrylic display panel designed to protect the LCD screen from damage and ensure clear visibility of calculations and results.

Image: A close-up of the SHARP EL-5160T-X calculator display, highlighting the clear acrylic panel protecting the screen, with "アクリルパネル搭載" (Acrylic Panel Equipped) text.
Note: The acrylic panel protects the screen, but it does not guarantee against LCD breakage or main unit malfunction.
Maintenance
Cleaning
To clean the calculator, gently wipe the surface with a soft, dry cloth. Do not use abrasive cleaners, solvents, or wet cloths, as these may damage the casing or internal components.
Battery Replacement
When the display becomes dim or unresponsive even in bright light, the battery may need replacement. The calculator uses one alkaline button battery. Refer to the full user manual for specific instructions on how to safely replace the battery.
Storage
Store the calculator in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity. Avoid placing heavy objects on top of the calculator to prevent damage.
Troubleshooting
- Display is blank or unresponsive:
Ensure the calculator is in a well-lit area for solar power. If the issue persists, the battery may be depleted. Try pressing the reset button located on the back of the unit with a thin object (e.g., a straightened paper clip). If still unresponsive, replace the battery.
- Incorrect calculation results:
Check the input values and the selected mode (e.g., DEG/RAD/GRAD). Ensure all previous calculations are cleared by pressing ON/C. A full reset might be necessary if the problem persists.
- Keys are not responding:
Clean the keypad area to remove any dust or debris. If individual keys are stuck, gently try to free them. If multiple keys are unresponsive, a reset or battery replacement may resolve the issue.
Specifications
| Brand | SHARP |
| Model Number | EL-5160T-X |
| Number of Functions | 710 |
| Number of Digits | 10 digits |
| Dimensions (W×D×H) | 80 × 166 × 15 mm |
| Weight | 108 g |
| Power Source | Battery, Solar |
| Battery Type | 1 Alkaline button battery (included) |
| Estimated Battery Life | Approx. 3,000 hours |
| Display Type | LCD |
| Exterior Material | Plastic |
Warranty and Support
Warranty Information
This SHARP EL-5160T-X scientific calculator comes with a 1-year warranty from the date of purchase. Please retain your proof of purchase for warranty claims. The warranty covers manufacturing defects under normal use conditions.
Customer Support
For further assistance, technical support, or warranty inquiries, please visit the official SHARP brand store or contact their customer service. You can find more information at the SHARP Store on Amazon.co.jp.