Casio FX-991MS 2nd Gen Scientific Calculator User Manual

1. Inleiding

The Casio FX-991MS 2nd Gen is a non-programmable scientific calculator designed for a wide range of mathematical and scientific applications. It features 401 functions and a clear 2-line display, making it suitable for students and professionals. This manual provides essential information for setup, operation, maintenance, and troubleshooting.

Figure 1: Casio FX-991MS 2nd Gen Scientific Calculator.

1.1 Sleutelkenmerke

• 401 Ingeboude funksies
• 2-Line Display for enhanced readability
• Solar and Battery Dual Power Source
• Multi-Replay Function for formula recall and editing
• Durable, drop-resistant body with water-resistant printing on keys
• Color-coded keys for intuitive operation

1.2 Wat is in die boks

• 1 x Casio FX-991MS 2nd Gen Scientific Calculator
• 1 x Gebruikershandleiding (hierdie dokument)
• 1 x Warranty Card with Serial Number
• 1 x Warranty Term Sheet

2. Opstelling

The Casio FX-991MS 2nd Gen calculator is designed for immediate use upon unboxing. It operates on both solar power and a nonstandard battery, ensuring continuous functionality.

2.1 Kragbron

The calculator utilizes a dual power system: solar power for sufficient light conditions and a built-in nonstandard battery for low-light environments or when solar power is insufficient. No initial battery installation is required as the battery is pre-installed.

2.2 Skakel aan/af

• Om aan te skakel: Druk die ON knoppie.
• Om af te skakel: Druk SKUIF dan AC (AF).

3. Bedryfsinstruksies

The Casio FX-991MS 2nd Gen offers a wide array of functions accessible through its intuitive key layout and 2-line display. The upper line displays the input expression, and the lower line shows the calculation result.

Figure 2: Calculator with its protective hard case.

3.1 Basiese Berekeninge

Enter numbers and operators in sequence. Press = to obtain the result.

• Optelling/Aftrekking: Gebruik + en - sleutels.
• Vermenigvuldiging/Deling: Gebruik × en ÷ sleutels.
• Hakies: Gebruik ( en ) for grouping expressions.

3.2 Scientific Functions

Access scientific functions using the dedicated keys or by pressing SKUIF followed by the desired function key.

• Trigonometriese funksies: sonde, cos, bruin and their inverse functions (SKUIF + sonde, ens.).
• Logarithmic Functions: log (base 10) and ln (natural logarithm).
• Krag- en wortelfunksies: x², x³, √, ³√, xʸ.

Figure 3: Illustration of trigonometric function keys.

3.3 Statistical Calculations

The calculator supports various statistical calculations. To enter STAT mode, press MODUS and select the appropriate statistical mode (e.g., SD for standard deviation, REG for regression).

• Data-invoer: Input data points using the M+ sleutel.
• Statistical Results: Calculate mean, standard deviation, sum of squares, etc., after data entry.

Figure 4: Illustration of statistical function keys.

3.4 Multi-Replay Function

The Multi-Replay function allows you to recall and edit previously executed formulas. Use the ▲ en ▼ cursor keys to navigate through past calculations. This feature is useful for correcting errors or performing similar calculations with different values.

Figure 5: The Multi-Replay function allows quick recall and editing of previous calculations.

3.5 Constants and Conversions

The calculator includes built-in scientific constants and unit conversion functions. Refer to the detailed function guide for specific constant codes and conversion procedures.

4. Onderhoud

Behoorlike onderhoud verseker die lang lewensduur en optimale werkverrigting van u sakrekenaar.

4.1 Skoonmaak

Wipe the calculator's exterior with a soft, dry cloth. Avoid using abrasive cleaners, solvents, or harsh chemicals, as these can damage the casing and water-resistant key printing.

4.2 Berging

Store the calculator in a cool, dry place away from direct sunlight and extreme temperatures. Use the provided protective cover to prevent scratches and damage to the keys and display.

Figure 6: Dimensions of the Casio FX-991MS 2nd Gen Calculator (16.2L x 7.7W Centimeters).

5. Probleemoplossing

If you encounter issues with your calculator, refer to the following common problems and solutions.

5.1 Vertoon kwessies

• Leë skerm: Ensure sufficient light for solar power or that the battery is functional. If the display remains blank, try pressing the ON knoppie.
• Dowwe vertoning: The battery may be low. While the calculator uses solar power, a weak battery can affect display clarity in certain conditions.

5.2 Incorrect Results

• Kontroleermodus: Verify that the calculator is in the correct mode (e.g., COMP for general calculations, STAT for statistics). Press MODUS te verander.
• Angle Unit: Ensure the correct angle unit (DEG, RAD, GRA) is selected for trigonometric calculations. Press MODUS multiple times to cycle through options.
• Herstel: If issues persist, perform a full reset. Press SKUIF dan CLR (MODE) and select Almal. This will clear all memory and settings.

6. Spesifikasies

7. Waarborg en Ondersteuning

Your Casio FX-991MS 2nd Gen Scientific Calculator comes with a manufacturer's warranty and dedicated support.

7.1 Vervaardigerwaarborg

Die produk word gedek deur 'n 3-year All India Manufacturer Warranty from the date of purchase. An additional 6 months warranty can be availed by registering your product online.

• To avail warranty: Produce the original bill copy/invoice at an authorized Casio service center. The warranty card and stamp are not mandatory for online purchases.
• Aanlyn registrasie: Registreer jou produk by https://register.casio.in for an extended warranty.

7.2 Kliëntediens

For any service-related inquiries or feedback, please contact Casio India:

• Hulplyn nommer: 011-66999200
• E-pos: casiocare@casio.co.in
• Vervaardiger kontakinligting: Casio India Co Pvt Ltd, A-41, 1st Floor, MCIE, Mathura Road, New Delhi-110044