Introduction
The MAUL Eco 850 is an environmentally friendly desktop calculator designed for office, desk, and school use. This solar-powered device features a 12-digit LCD display and is constructed from 80% recycled plastic, earning it the "Blue Angel" eco-label. This manual provides instructions for setup, operation, maintenance, and troubleshooting to ensure optimal performance and longevity of your calculator.
Image: The MAUL Eco 850 Desktop Calculator, demonstrating its compact size and clear display.
Setup
The MAUL Eco 850 calculator is solar-powered and does not require batteries. It is ready for use when exposed to sufficient light.
- Unpacking: Carefully remove the calculator from its environmentally friendly, plastic-free packaging.
- Power On: Place the calculator in an area with adequate ambient light (at least 50 lux). The display should activate automatically. If the display does not turn on, ensure it is exposed to brighter light.
Image: The MAUL Eco 850 calculator ready for use on a desk.
Operating Instructions
The MAUL Eco 850 features a 12-digit LCD display and a range of functions for various calculations.
Basic Functions
- Addition (+), Subtraction (-), Multiplication (×), Division (÷): Enter the first number, press the desired operation key, enter the second number, then press the equals (=) key for the result.
- Percentage (%): To calculate a percentage, enter the base number, press the multiplication (×) key, enter the percentage value, then press the % key. For example, to calculate 10% of 200, enter 200 × 10 %.
- Square Root (√): Enter the number, then press the √ key to calculate its square root.
- Sign Change (+/-): Press this key to change the sign of the displayed number from positive to negative or vice versa.
- Double Zero (00): Quickly enter two zeros.
Memory Functions
- M+ (Memory Plus): Adds the displayed value to the memory.
- M- (Memory Minus): Subtracts the displayed value from the memory.
- MR (Memory Recall): Recalls the value stored in memory to the display.
- MC (Memory Clear): Clears the memory.
Clear Functions
- ON/AC (All Clear): Clears all entries and memory, resetting the calculator.
- C (Clear Entry): Clears the last entered number or the current calculation without affecting memory or previous operations.
Image: Detailed view of the calculator's display and key layout.
Maintenance
To ensure the longevity and proper functioning of your MAUL Eco 850 calculator, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the calculator's surface and display. Avoid using liquid cleaners, abrasive materials, or solvents, as these can damage the plastic and electronic components.
- Power Source: As the calculator is solar-powered, ensure it is regularly exposed to light to maintain its charge. Avoid storing it in dark places for extended periods.
- Storage: Store the calculator in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity.
- Handling: The calculator features sturdy plastic buttons. Avoid dropping the device or subjecting it to strong impacts.
Image: Side view highlighting the calculator's ergonomic design.
Troubleshooting
If you encounter issues with your MAUL Eco 850 calculator, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or dim. | Insufficient light for solar cells. | Move the calculator to a brighter area. Ensure the solar panel is not obstructed. |
| Incorrect calculation results. | Input error or previous calculation residue. | Press ON/AC to clear all entries and memory, then re-enter the calculation. Double-check your input. |
| Keys are unresponsive. | Temporary software glitch or low power. | Ensure adequate light. If the problem persists, try pressing ON/AC. |
Specifications
- Brand: MAUL
- Model: Eco 850 (Model Number: 7268890)
- Display: 12-digit LCD, 1-line display
- Power Source: Solar Powered (operates from 50 lux)
- Material: Housing made from 80% recycled plastic
- Functions: Basic arithmetic (+, -, ×, ÷), Percentage (%), Square Root (√), Memory (M+, M-, MR, MC), Sign Change (+/-), Double Zero (00), Clear Entry (C), All Clear (ON/AC).
- Dimensions: 17.5 x 12.6 x 0.1 cm (approx. 6.9 x 5.0 x 0.04 inches)
- Weight: 211 g (approx. 7.4 oz)
- Environmental Certification: Blue Angel / UZ116
Image: The calculator proudly displaying the Blue Angel eco-label.
Warranty and Support
The MAUL Eco 850 Desktop Calculator comes with a 5-year warranty, reflecting MAUL's commitment to precision and reliability. For support or warranty claims, please refer to the contact information provided with your purchase or visit the official MAUL website. MAUL, a German family business with over 110 years of experience, ensures high-quality products and customer service.
