Casio FX-260 Solar II Scientific Calculator User Manual

Introduction

This manual provides detailed instructions for the proper use and maintenance of your Casio FX-260 Solar II Scientific Calculator. Please read this manual thoroughly to ensure optimal performance and longevity of your device. The Casio FX-260 Solar II is designed for a wide range of mathematical and scientific calculations, including fractions, trigonometry, and statistics.

Product Overview

Image: Casio FX-260 Solar II Scientific Calculator. This image displays the calculator's front view, showing its solar panel, display, and key layout, including scientific functions and fraction keys. The packaging indicates it is permitted on various standardized tests like AP, SAT, and ACT.

1. Setup

1.1 Power Source

The Casio FX-260 Solar II calculator is primarily solar-powered. It operates efficiently in well-lit environments. No batteries are required for normal operation under sufficient light.

1.2 Initial Power On

To turn on the calculator, ensure it is exposed to adequate light and press the ON button. The display should show "0". If the display remains blank, ensure sufficient light is available.

1.3 Display Adjustment

The display contrast is fixed. Ensure the calculator is viewed at a comfortable angle under appropriate lighting conditions for optimal readability.

2. Operating Instructions

This section details the basic and advanced operations of your calculator.

2.1 Basic Arithmetic Operations

Enter numbers using the numeric keypad. Use the +, -, X (multiplication), and ÷ (division) keys for basic calculations. Press = to display the result.

• Example: To calculate 5 + 3, press 5 + 3 =. The result will be 8.

2.2 Scientific Functions

Many keys have secondary functions, accessed by pressing the SHIFT key first, then the desired function key. Secondary functions are typically printed above the keys.

• Trigonometric Functions: Use sin, cos, tan for sine, cosine, and tangent. Use SHIFT 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). Use SHIFT then 10^x or e^x for their inverse functions.
• Power and Root Functions: Use x² for squaring, SHIFT then √ for square root. Use x³ for cubing, SHIFT then ³√ for cube root. Use x^y for arbitrary powers.

2.3 Fraction Calculations

The calculator supports fraction input and calculations.

• Entering Fractions: Use the a b/c key. For example, to enter 1/2, press 1 a b/c 2. To enter a mixed number like 1 2/3, press 1 a b/c 2 a b/c 3.
• Converting Fractions to Decimals: After a fraction result, press d/c to convert to decimal. Press again to convert back.

2.4 Memory Functions

The calculator includes memory functions to store and recall values.

• Store to Memory: To store a displayed value, press SHIFT then X→M.
• Recall from Memory: To recall the stored value, press MR.
• Memory Plus/Minus: Use M+ to add the displayed value to memory, and M- to subtract it.
• Clear Memory: Press SHIFT then SAC (Clear All Memory).

2.5 Angle Units (DEG/RAD/GRAD)

The calculator can operate in Degree (DEG), Radian (RAD), or Gradian (GRAD) modes for trigonometric calculations.

• Changing Mode: Press the MODE key repeatedly to cycle through DEG, RAD, and GRAD. The current mode is indicated on the display.

2.6 Clearing Entries and All Clear

• Clear Entry (C): Press C to clear the last entered number or operation.
• All Clear (AC): Press AC to clear all entries, operations, and reset the calculator to its initial state (except memory).

3. Maintenance

3.1 Cleaning

To clean the calculator, wipe it with a soft, dry cloth. Do not use abrasive cleaners, solvents, or wet cloths, as these can damage the casing or internal components.

3.2 Storage

Store the calculator in a cool, dry place away from direct sunlight and extreme temperatures. Avoid placing heavy objects on top of the calculator.

3.3 Solar Panel Care

Ensure the solar panel is kept clean and unobstructed to maintain optimal power generation. Avoid covering the solar panel during use.

4. Troubleshooting

• Display is blank or dim:

  Ensure the calculator is exposed to sufficient light. The FX-260 Solar II is solar-powered and requires adequate illumination to function. Move the calculator to a brighter area.
• Incorrect calculation results:

  Check the current angle unit mode (DEG, RAD, GRAD) if performing trigonometric calculations. Press MODE to cycle through modes. Ensure all previous operations are cleared by pressing AC before starting a new calculation. Verify correct input of numbers and operations.

• Calculator freezes or becomes unresponsive:

  In rare cases, strong static electricity or other abnormal conditions may cause the calculator to malfunction. Press the AC button to reset the calculator. If the issue persists, move the calculator to a different environment.

5. Specifications

6. Warranty and Support

For information regarding warranty coverage and customer support, please refer to the warranty card included with your product or visit the official Casio website. Keep your purchase receipt as proof of purchase.

Casio Official Website: www.casio.com