1. Pengenalan
The Casio fx-991ES Plus 2 is an advanced scientific calculator designed for a wide range of mathematical and scientific applications, suitable for secondary school and university-level studies. It features a 'Natural Textbook Display' that presents mathematical expressions and results exactly as they appear in textbooks, enhancing clarity and ease of use. With 417 built-in functions, this calculator is a powerful tool for complex calculations.
Rajah 1.1: Depan view of the Casio fx-991ES Plus 2 Scientific Calculator, showcasing its natural display and key layout.
2. Maklumat Keselamatan
To ensure safe and proper use of your calculator, please observe the following precautions:
- Do not expose the calculator to extreme temperatures, direct sunlight, or high humidity.
- Avoid dropping or subjecting the calculator to strong impacts.
- Do not attempt to disassemble or modify the calculator.
- Keep the calculator out of reach of small children.
- Use only the specified battery type (LR-44) for replacement.
3. Ciri-ciri Produk
The Casio fx-991ES Plus 2 offers a comprehensive set of features to support various academic and professional needs:
- Paparan Buku Teks Semulajadi: Displays formulas and results as they appear in textbooks.
- 417 Fungsi: A wide array of functions for diverse calculations.
- Equation Resolution: Solve linear and polynomial equations.
- Matrix and Vector Calculation: Perform operations with matrices and vectors.
- Nombor Kompleks: Mengendalikan pengiraan yang melibatkan nombor kompleks.
- Integral and Differential Calculus: Execute definite integral and differential calculations.
- 40 Physical Constants: Access commonly used physical constants.
- Combined Power Supply: Operates on both solar power and an LR-44 alkaline button cell.
- Regression and Correlation Coefficients: Statistical analysis capabilities.
- 24 Levels of Brackets: Supports complex nested expressions.
4. Persediaan
4.1 Sumber Kuasa
The calculator utilizes a dual power system:
- Kuasa Suria: The calculator is primarily powered by solar energy when sufficient light is available.
- Kuasa Bateri: An LR-44 alkaline button cell battery (included) provides power in low-light conditions or when solar power is insufficient. The calculator automatically switches between power sources.
4.2 Kuasa Awal Hidup
Untuk menghidupkan kalkulator, tekan butang [HIDUP] button. The display will show the initial screen. If the calculator does not turn on, ensure it is exposed to adequate light or check the battery.
5. Arahan Operasi
5.1 Operasi Asas
Perform standard arithmetic operations using the numeric keys and operators ([+], [-], [x], [/]). Tekan [=] untuk mendapatkan hasilnya.
5.2 Fungsi Lanjutan
Access advanced functions using the [SHIFT] dan [ALPHA] keys, which activate the secondary and tertiary functions printed above the keys, respectively. Refer to the markings on the calculator keys for specific functions.
- Penyelesai Persamaan: Gunakan [MOD] button to select the EQN mode for solving equations.
- Matrix/Vector Calculations: Select the MATRIX or VECTOR mode via [MOD] to define and perform operations on matrices and vectors.
- Calculus: Use the integral and differential symbols to perform definite integral and differential calculations.
- Physical Constants: Access the built-in physical constants by pressing [SHIFT] kemudian [7] (CONST).
5.3 Natural Textbook Display
The Natural Textbook Display allows you to input and view fractions, roots, and other mathematical expressions in the same way they appear in textbooks. For example, untuk memasukkan pecahan, gunakan kekunci pecahan [ab/c]Untuk memasukkan punca kuasa dua, tekan [√].
6. Penyelenggaraan
- Pembersihan: Lap kalkulator dengan kain lembut dan kering. Jangan gunakan pembersih atau pelarut yang kasar.
- Penggantian Bateri: When the display becomes dim or calculations are slow, it may be time to replace the LR-44 battery. Carefully open the battery compartment on the back of the calculator, replace the old battery with a new one, ensuring correct polarity, and close the compartment securely.
- Storan: When not in use for extended periods, store the calculator in its protective slide-on hard case in a cool, dry place away from direct sunlight.
7. Penyelesaian masalah
| Masalah | Kemungkinan Punca | Penyelesaian |
|---|---|---|
| Kalkulator tidak boleh dihidupkan. | Insufficient light for solar panel, or dead battery. | Move to a brighter area or replace the LR-44 battery. |
| Keputusan pengiraan yang salah. | Incorrect mode setting, input error, or memory issue. | Check the current mode ([MOD]), re-enter the calculation, or clear all memory ([SHIFT] [CLR]). |
| Paparan malap atau berkelip. | Kuasa bateri rendah. | Replace the LR-44 battery. |
8. Spesifikasi
| Atribut | Perincian |
|---|---|
| Dimensi Produk | 6.38 x 2.95 x 0.1 inci (16.2 x 7.5 x 0.25 cm) |
| Berat Barang | 3.35 auns (95 gram) |
| Nombor Model | fx-991ES PLUS-2 |
| Bateri | 1 A batteries required (LR-44, included) |
| Sumber Kuasa | Solar Powered and Battery |
| Saiz Skrin | 4 inches / 10 cm (diagonal) |
| Jenis Kalkulator | Kejuruteraan/Saintifik |
| Pengeluar | CASIO |
Figure 8.1: The Casio fx-991ES Plus 2 Scientific Calculator shown with approximate dimensions for scale.
9. Waranti dan Sokongan
Casio products are manufactured to high-quality standards. For information regarding warranty coverage, technical support, or service, please refer to the warranty card included with your product or visit the official Casio webtapak. Simpan resit pembelian anda sebagai bukti pembelian untuk tuntutan waranti.