Introduction
Thank you for choosing the Irfora Multifunction Bamboo 12-Digit Calculator. This eco-friendly calculator combines classic design with modern functionality, featuring a durable bamboo casing and dual power source. This manual provides essential information for setting up, operating, and maintaining your calculator to ensure optimal performance.
Figure 1: Front view of the Irfora Bamboo Calculator, showcasing its natural bamboo finish and large LCD display.
1. Setup
1.1 Unpacking
Carefully remove the calculator from its packaging. Inspect the device for any signs of damage. Retain the packaging for future storage or transport.
1.2 Powering On
The calculator features a dual power system: solar and button battery. It automatically switches between power sources for efficient operation.
- Solar Power: Place the calculator in a well-lit area. The solar panel will convert light into energy, powering the device.
- Battery Power: In low-light conditions, the calculator will automatically switch to button battery power.
- To turn on the calculator, press the ON/C/CE or AC key.
Figure 2: Angled view of the Irfora Bamboo Calculator, showing the solar panel and LCD display.
2. Operating Instructions
The calculator features 29 large, comfortable keys with carved numbers that are designed not to fade over time.
Figure 3: Close-up view highlighting the large, carved bamboo keys for comfortable and durable use.
2.1 Basic Arithmetic Operations
Perform standard calculations using the following keys:
- + (Addition)
- - (Subtraction)
- × (Multiplication)
- ÷ (Division)
- = (Equals)
2.2 Memory Functions
The calculator includes memory functions for complex calculations:
- M+: Adds the displayed value to the memory.
- M-: Subtracts the displayed value from the memory.
- MRC: Recalls the memory value. Pressing twice clears the memory.
2.3 Special Functions
- % (Percentage): Calculates percentages.
- √ (Square Root): Calculates the square root of the displayed number.
- +/- (Sign Change): Changes the sign of the displayed number (positive to negative, or vice versa).
- AC (All Clear): Clears all entries and memory.
- ON/C/CE (On/Clear Entry): Turns on the calculator. When on, clears the last entry. Pressing twice clears all entries.
Figure 4: A hand demonstrating the use of the calculator for daily tasks.
2.4 Automatic Power Off
To conserve energy, the calculator will automatically power off after approximately 12 minutes of inactivity. Press ON/C/CE or AC to turn it back on.
3. Maintenance
3.1 Cleaning
To clean the calculator, gently wipe the surface with a soft, dry cloth. For stubborn dirt, a slightly damp cloth can be used, but ensure no moisture enters the device. Avoid using harsh chemicals or abrasive cleaners.
3.2 Storage
Store the calculator in a cool, dry place away from direct sunlight and extreme temperatures. Prolonged exposure to direct sunlight can affect the bamboo finish.
3.3 Battery Replacement
The calculator uses a button battery (type not specified, typically AG10 or LR1130). If the display becomes dim or unresponsive in low light, the battery may need replacement. Consult a qualified technician or refer to the product packaging for specific battery type and replacement instructions. Improper battery replacement can damage the device.
4. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or dim. | Insufficient light for solar power, or low battery. | Move the calculator to a brighter area. If the problem persists, the button battery may need replacement. |
| Calculator does not turn on. | No power, or device is in auto-off mode. | Ensure adequate light for solar power. Press ON/C/CE or AC. If still unresponsive, replace the button battery. |
| Incorrect calculation results. | Incorrect key input, or temporary internal error. | Press AC to clear all entries and restart the calculation. Double-check your input. |
5. Specifications
- Brand: Irfora
- Model: LAKJPOS0867
- Display: 12-Digit Large LCD
- Power Source: Dual Power (Solar & Button Battery)
- Keys: 29 Bamboo Keys with Carved Numbers
- Functions: Basic Arithmetic, Square Root, Percentage, Memory (M+, M-, MRC), Sign Change
- Auto Power Off: Approximately 12 minutes of inactivity
- Product Dimensions: 19 x 14 x 4 cm (approx. 7.5 x 5.5 x 1.6 inches)
- Product Weight: 295 g (approx. 0.65 lbs)
6. Warranty and Support
For warranty information and customer support, please refer to the documentation included with your purchase or contact your retailer. Keep your proof of purchase for any warranty claims.
For further assistance, please visit the Irfora brand page on Amazon.co.jp.