1. Introduction
This manual provides instructions for the proper use and maintenance of your Casio HS-8VA Basic Calculator. Please read this manual thoroughly before using the calculator to ensure optimal performance and longevity.
The Casio HS-8VA is a compact, 8-digit basic calculator designed for everyday arithmetic calculations. It features a dual power source (solar and battery) for reliable operation.
2. Key Features
- 8-digit display for clear readability.
- Dual power source: Solar and Battery (LR1130 or equivalent).
- Basic arithmetic functions: addition, subtraction, multiplication, division.
- Percentage (%) key.
- Square root (√) key.
- Memory functions (M+, M-, MRC).
- Sign change (+/-) key.
- Compact and lightweight design for portability.
3. Setup and Initial Use
3.1 Power Source
The Casio HS-8VA calculator operates on a dual power system: solar power and a single LR1130 (or equivalent) button cell battery. Under sufficient lighting, the calculator will primarily use solar power. In low light conditions, it will automatically switch to battery power.
Image: Front view of the Casio HS-8VA calculator. Note the solar panel located above the display, which provides power in well-lit environments.
3.2 Turning On/Off
- To turn on the calculator, press the ON/C key.
- The calculator will automatically turn off after approximately 6 minutes of inactivity to conserve battery power.
4. Operating Instructions
4.1 Basic Calculations
Enter numbers using the numeric keypad. Use the +, -, ×, and ÷ keys for arithmetic operations. Press = to display the result.
- Example: To calculate 15 + 7: Press 1 5 + 7 = (Result: 22)
4.2 Clear Functions
- ON/C: Clears the current entry and all calculations. Pressing it once clears the entry, pressing it twice clears everything.
- CE (Clear Entry): (Note: This model uses ON/C for clear entry functionality)
4.3 Memory Functions
The calculator includes three memory keys:
- M+: Adds the displayed value to the memory.
- M-: Subtracts the displayed value from the memory.
- MRC: Press once to recall the memory value. Press twice to clear the memory.
4.4 Percentage Calculations
Use the % key for percentage calculations.
- Example: To calculate 10% of 200: Press 2 0 0 × 1 0 % (Result: 20)
4.5 Square Root
Press the √ key after entering a number to calculate its square root.
- Example: To calculate the square root of 25: Press 2 5 √ (Result: 5)
4.6 Sign Change
Use the +/- key to change the sign of the displayed number (positive to negative, or negative to positive).
Image: The Casio HS-8VA calculator held in a hand, illustrating its compact and portable design, suitable for pocket use.
5. Maintenance and Care
5.1 General Care
- Keep the calculator dry. Avoid exposure to water or high humidity.
- Do not expose the calculator to extreme temperatures (hot or cold).
- Clean the calculator with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Avoid dropping the calculator or subjecting it to strong impacts.
5.2 Battery Replacement
When the display becomes dim or calculations are incorrect even in sufficient light, the battery may need replacement. The Casio HS-8VA uses one LR1130 (or equivalent) button cell battery.
- Turn off the calculator.
- Locate the battery compartment cover on the back of the unit.
- Carefully remove the cover using a small screwdriver if necessary.
- Remove the old battery and insert a new LR1130 battery with the positive (+) side facing up.
- Replace the battery compartment cover securely.
- Dispose of old batteries according to local regulations.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or dim. | Insufficient light for solar power, or low battery. | Move to a brighter area. If problem persists, replace the battery. |
| Incorrect calculation results. | Incorrect key input, or low battery affecting internal circuits. | Clear all calculations using ON/C and re-enter. Replace battery if necessary. |
| Keys are unresponsive. | Calculator might be frozen, or physical damage. | Press ON/C multiple times. If unresponsive, try replacing the battery. If still unresponsive, contact support. |
7. Specifications
| Feature | Detail |
|---|---|
| Model | Casio HS-8VA |
| Display Digits | 8 digits |
| Power Source | Solar and 1 x LR1130 (or equivalent) battery |
| Dimensions (L x W x H) | 5.84 x 5.84 x 0.25 cm (approximately 2.3 x 2.3 x 0.1 inches) |
| Weight | 35 grams (approximately 1.23 ounces) |
| Material | Plastic, Metal |
Image: Casio HS-8VA calculator with key dimensions indicated. The image shows the calculator's length as 10.16cm and width as 5.72cm.
8. Warranty Information
Casio products are manufactured to high-quality standards. This product is covered by a limited warranty against defects in materials and workmanship. The specific terms and duration of the warranty may vary by region. Please refer to the warranty card included with your purchase or visit the official Casio website for detailed warranty information applicable to your location.
Keep your proof of purchase (receipt) as it will be required for any warranty claims.
9. Customer Support
For further assistance, technical support, or inquiries regarding your Casio HS-8VA calculator, please contact Casio customer service. Contact information can typically be found on the official Casio website or on the packaging of your product.
You can also visit the Casio Brand Store for more product information and support resources.
