Introducció
This manual provides detailed instructions for the proper use and maintenance of your Casio fx-991AR X Scientific Calculator. Please read this manual thoroughly before using the calculator to ensure correct operation and to maximize its capabilities. Keep this manual for future reference.
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Característiques clau
- Display expressions as they appear in textbooks.
- Supports both Arabic and English languages.
- 542 built-in functions for various scientific and engineering calculations.
- High-resolution screen for clear display of graphs and data.
- Two-way power system: Solar cell and LR44 button-type battery.
- List-based STAT data editor for statistical analysis.
- Integration, Differential Equation, Matrix, Vector, and Complex Number calculations.
- CALC and SOLVE functions.
- Base-n calculations and Logical operations.
- 40 scientific constants and 40 metric conversions.
- 9 variable memories.
- QR code generator for data visualization.
Calculator Components
Figura 1: Casio fx-991AR X Scientific Calculator alongside a page from its instruction manual, illustrating its compact design and display capabilities.
The calculator features a full dot display, plastic keys, and a hard case for protection. Key areas include the display, function keys, numeric keypad, and navigation buttons.
Configuració
Font d'alimentació
The Casio fx-991AR X operates on a two-way power system: a solar cell and one LR44 button-type battery. Ensure the battery is correctly installed. The solar cell provides power in well-lit environments, extending battery life.
Configuració inicial
- Premeu el botó ON botó per engegar la calculadora.
- If prompted, select your preferred display language (Arabic or English) using the navigation keys and pressing =.
- Adjust display contrast if necessary via the MAJÚS + CONFIGURACIÓ DEL MENÚ opcions.
Instruccions de funcionament
Operacions bàsiques
- Arithmetic Calculations: Enter numbers and operators (+, -, x, ÷) i després premeu =.
- Parèntesis: Ús ( i ) for grouping expressions.
- Encès/apagat: Premeu ON per encendre. Premeu MAJÚS aleshores AC (OFF) per apagar.
- Esborrar entrada/Esborrar tot: Premeu DEL to delete the last character. Press AC per esborrar el càlcul actual.
- Answer Memory: The result of the last calculation is stored in Ans memory. Press Ans to recall it.
Funcions avançades
Figura 2: Detallada view of the Casio fx-991AR X keypad, highlighting the various function keys and the multi-line display.
The fx-991AR X offers a wide range of advanced functions. Refer to the on-screen menu (CONFIGURACIÓ DEL MENÚ) for specific modes and operations.
- Funcions trigonomètriques: Ús pecat, cos, bronzejat keys. For inverse functions, press MAJÚS primer.
- Logarithmic and Exponential Functions: Ús registre, ln, 10x, ex claus.
- Càlculs estadístics: Enter STAT mode via CONFIGURACIÓ DEL MENÚ to perform standard deviation, regression analysis, etc.
- Matrix/Vector Calculations: Access these modes through CONFIGURACIÓ DEL MENÚ to define and manipulate matrices and vectors.
- Resolutor d'equacions: Utilitza el RESOLVER funció (sovint MAJÚS + CALC) to solve equations.
- Unit Conversions & Constants: Premeu MAJÚS + CONST or MAJÚS + CONV to access scientific constants and metric conversions.
Manteniment
- Neteja: Netegeu la calculadora amb un drap suau i sec. No utilitzeu productes de neteja abrasius ni dissolvents.
- Emmagatzematge: Store the calculator in its hard case when not in use to protect it from dust and impact. Avoid exposing it to extreme temperatures or humidity.
- Substitució de la bateria: If the display becomes dim or calculations are erratic, replace the LR44 battery. Ensure the calculator is off before replacing the battery.
Resolució de problemes
- La calculadora no s'encén: Check battery installation. Ensure sufficient light for the solar cell.
- Resultats incorrectes: Verify input values and calculation mode. Reset the calculator if necessary (refer to the manual for reset procedure, usually MAJÚS + CLR).
- La pantalla és tènue: Replace the LR44 battery. Ensure adequate lighting for the solar panel.
- Missatges d'error: Consult the full Casio fx-991AR X manual for specific error code explanations and solutions. Common errors include "Math ERROR" (invalid mathematical operation) and "Syntax ERROR" (incorrect expression input).
Especificacions
| Característica | Detall |
|---|---|
| Nom del model | fx-991AR X |
| Nombre de funcions | 542 |
| Mostra | Full Dot Display, 10-digit mantissa + 2-digit exponential |
| Font d'alimentació | Two-way (Solar & 1 x LR44 battery) |
| Durada de la bateria | Approx. 2 years (if used 1 hour daily) |
| Dimensions (A x A x P) | 11.1 × 77.0 × 165.5 mm |
| Pes | Aprox. 90 g (inclosa la bateria) |
| Material | Plàstic |
| Idiomes | Arabic, English |
| Main Accessory | Estoig dur |
Garantia i Suport
Per obtenir informació sobre la garantia i assistència al client, consulteu la targeta de garantia inclosa amb el producte o visiteu el lloc web oficial de Casio. weblloc web. Conserveu el rebut de compra com a comprovant de compra.
