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

1. Ifihan

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 Key Awọn ẹya ara ẹrọ

• 401 -Itumọ ti ni Awọn iṣẹ
• 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 Kini ni Apoti

• 1 x Casio FX-991MS 2nd Gen Scientific Calculator
• 1 x Itọsọna olumulo (iwe yii)
• 1 x Warranty Card with Serial Number
• 1 x Warranty Term Sheet

2. Eto

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 orisun agbara

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 Titan / Pa a

• Lati tan-an: Tẹ awọn ON bọtini.
• To turn off: Press Yipada lẹhinna AC (PA)

3. Awọn ilana Iṣiṣẹ

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 Awọn iṣiro ipilẹ

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

• Àfikún/Iyọkuro: Lo + ati - awọn bọtini.
• Multiplication/Division: Lo × ati ÷ awọn bọtini.
• Awọn obi: Lo ( ati ) for grouping expressions.

3.2 Scientific Awọn iṣẹ

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

• Awọn iṣẹ Trigonometric: ese, kos, tan ati awọn iṣẹ onidakeji wọn (Yipada + ese, ati bẹbẹ lọ).
• Awọn iṣẹ Logarithmic: wọle (mimọ 10) ati ln (logarithm adayeba).
• Agbara ati Awọn iṣẹ gbongbo: 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 MODE and select the appropriate statistical mode (e.g., SD for standard deviation, REG for regression).

• Wiwọle Data: Input data points using the M+ bọtini.
• 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 ▲ ati ▼ 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. Itọju

Proper maintenance ensures the longevity and optimal performance of your calculator.

4.1 Ninu

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 Ibi ipamọ

Fi ẹ̀rọ ìṣirò náà pamọ́ sí ibi tí ó tutù tí ó sì gbẹ, tí kò sí ìmọ́lẹ̀ oòrùn tààrà àti ooru tó le koko. Lo ìbòrí ààbò tí a pèsè láti dènà ìfọ́ àti ìbàjẹ́ sí àwọn kọ́kọ́rọ́ àti ìfihàn.

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

5. Laasigbotitusita

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

5.1 Ifihan oran

• Ifihan òfo: Ensure sufficient light for solar power or that the battery is functional. If the display remains blank, try pressing the ON bọtini.
• Ifihan Irẹwẹsi: 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

• Ṣayẹwo Ipo: Verify that the calculator is in the correct mode (e.g., COMP for general calculations, STAT for statistics). Press MODE lati yipada.
• Angle Unit: Ensure the correct angle unit (DEG, RAD, GRA) is selected for trigonometric calculations. Press MODE multiple times to cycle through options.
• Tun: If issues persist, perform a full reset. Press Yipada lẹhinna CLR (MODE) and select Gbogbo. This will clear all memory and settings.

6. Awọn pato

7. Atilẹyin ọja ati Support

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

7.1 olupese atilẹyin ọja

Awọn ọja ti wa ni bo nipasẹ a 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.
• Iforukọsilẹ lori ayelujara: Forukọsilẹ ọja rẹ ni https://register.casio.in for an extended warranty.

7.2 Onibara Support

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

• Nọmba Laini Iranlọwọ: 011-66999200
• Imeeli: casiocare@casio.co.in
• Alaye olubasọrọ Olupese: Casio India Co Pvt Ltd, A-41, 1st Floor, MCIE, Mathura Road, New Delhi-110044