Introducció
This manual provides detailed instructions for the proper use and maintenance of your Casio FX-991ES Plus-2nd Edition Scientific Calculator. Designed for students and professionals, this calculator offers a wide range of functions to support various mathematical and scientific computations.
Key features of your calculator include:
- Natural Textbook Display for easy-to-understand input and output.
- 417 built-in functions, including basic arithmetic, trigonometry, statistics, and advanced calculations.
- 10-digit mantissa + 2-digit exponential display for precise results.
- Colour-coded keypad for intuitive key differentiation.
- Durable slide-on hard case for protection.
Configuració
Encès inicial
The calculator is powered by both solar energy and a battery. Under normal lighting conditions, the solar panel assists in operation. To turn on the calculator, press the [ACTIVAT] button located on the upper right side of the keypad.
Figura 1: Frontal view of the calculator with its display showing a mathematical expression.
Ajust de la pantalla
The calculator features a high-resolution display. If the display contrast needs adjustment, refer to the 'MODE SETUP' menu. Press [MAJÚS] aleshores [MODE SETUP], navigate to 'Contrast' and adjust using the arrow keys.
Figura 2: Primer pla view of the calculator's Natural Textbook Display.
Instruccions de funcionament
Operacions aritmètiques bàsiques
Introdueix números i utilitza els [+], [-], [×], [÷] tecles per a suma, resta, multiplicació i divisió. Premeu [=] per obtenir el resultat.
Funcions científiques
The calculator supports a wide array of scientific functions. For trigonometric functions (sin, cos, tan), press the respective key. For inverse functions (sin⁻¹, cos⁻¹, tan⁻¹), press [MAJÚS] followed by the function key.
- Logaritmes: Ús [log] for base 10 logarithm and [ln] for natural logarithm.
- Potències i arrels: Ús [x²] for squares, [√] for square roots, and [xʸ] for general powers.
Funcions avançades
The FX-991ES Plus-2nd Edition offers advanced features for complex calculations:
- Resolutor d'equacions: Access the equation solver through the [MODE] menu to solve linear, quadratic, and cubic equations.
- Càlculs matricials i vectorials: Perform operations on matrices and vectors by entering the [MODE] and selecting the appropriate mode.
- Càlculs estadístics: Use the STAT mode for statistical analysis, including standard deviation, regression, and more.
Figura 3: Detallada view of the calculator's keypad layout.
Manteniment
Neteja
To clean the calculator, wipe it with a soft, dry cloth. Do not use abrasive cleaners, solvents, or harsh chemicals, as these may damage the casing o components interns.
Canvi de bateria
The calculator uses a single button-cell battery (CR2032 or equivalent) as a backup power source. If the display becomes dim or calculations are inconsistent, the battery may need replacement. To replace the battery:
- Apagueu la calculadora.
- Carefully remove the screws on the back panel to access the battery compartment.
- Traieu la bateria antiga i introduïu-ne una de nova, assegurant la polaritat correcta.
- Securely replace the back panel and screws.
Figura 4: posterior view of the calculator, indicating battery compartment access.
Resolució de problemes
Problemes comuns i solucions
- La calculadora no s'encén: Ensure sufficient light for the solar panel. If not, the battery may be depleted. Replace the battery as described in the Maintenance section.
- Display shows 'ERROR': This indicates a mathematical error (e.g., division by zero, invalid input). Check your input and calculation method. Press [AC] per esborrar l'error.
- Resultats incorrectes: Verify that the correct mode (e.g., DEG, RAD, GRAD for angles) is selected. Resetting the calculator to its default settings can resolve many issues. To reset, press [MAJÚS] aleshores [CLR], select 'All', and confirm.
Especificacions
Detalls tècnics
| Característica | Detall |
|---|---|
| Número de model | FX-991ESPLUS-2WDTV |
| Funcions | 417 |
| Tipus de visualització | Natural Textbook Display (10-digit mantissa + 2-digit exponential) |
| Font d'alimentació | Solar and Battery Powered |
| Dimensions (LxWxH) | 16.2 x 7.7 x 1.1 centímetres |
| Pes de l'article | 95 g |
| Material | Plàstic |
| Components inclosos | Calculadora científica 1 |
Garantia i Suport
Informació de la garantia
Your Casio FX-991ES Plus-2nd Edition Scientific Calculator comes with a 3-year manufacturer's warranty. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.
Atenció al client
For technical assistance, troubleshooting not covered in this manual, or warranty service, please contact Casio customer support. Refer to the official Casio weblloc web per obtenir la informació de contacte i els recursos d'assistència més actualitzats.
