OSALO Desktop Calculator OS-8812T User Manual

1. Úvod

Thank you for choosing the OSALO Desktop Calculator OS-8812T. This 12-digit desktop calculator is designed for both home and office use, offering a large display, comfortable keys, and essential functions including a tax calculation feature. This manual provides detailed instructions for setup, operation, maintenance, and troubleshooting to ensure optimal performance and longevity of your device.

2. Klíčové vlastnosti

• Tax Rate Calculator Function: Simplifies tax calculations with integrated tax rate adjustments (TAX+, TAX-).
• Velký 12místný LCD displej: High-resolution display for clear and easy readability, tilted at 15 degrees for improved viewpohodlí.
• Ergonomic Concave Round Buttons: Designed for comfortable and accurate input, adapting to your fingertips.
• Sensitive Keys: Ensures quick and precise typing.
• Duální zdroj napájení: Operates on solar energy and a single LR44 battery (included), providing reliable power and energy efficiency.
• Protiskluzový design: Features anti-slip mats for stability during use.

3. Konec produktuview a Rozměry

Familiarize yourself with the calculator's layout and physical specifications.

Obrázek: Přední a boční view of the OSALO Desktop Calculator OS-8812T, illustrating its dimensions (189mm length, 140mm width, 31mm height, 15-degree display tilt).

Obrázek: Podrobný view of the OSALO Desktop Calculator OS-8812T with key functions labeled, including Operation Symbol Display, Grand Total (GT), Memory Plus/Minus (M+, M-), Back Space, All Clear (AC), Tax Rate Settings (TAX+, TAX-), Memory Load/Clear (MRC), and Root (√).

4. Nastavení

4.1 Zdroj napájení

The OSALO OS-8812T calculator operates using a dual power system: solar energy and a single LR44 battery. The calculator will automatically switch to battery power in low light conditions.

Instalace/výměna baterie:

1. Ujistěte se, že je kalkulačka vypnutá.
2. Vyhledejte přihrádku na baterie na zadní straně kalkulačky.
3. K otevření krytu baterie použijte malý šroubovák.
4. Insert one LR44 battery, ensuring the correct polarity (+/-).
5. Nasaďte zpět kryt baterie a zajistěte jej.

Image: The underside of the OSALO Desktop Calculator, highlighting the battery compartment and the anti-slip mats at each corner.

4.2 První použití

Stiskněte tlačítko AC (All Clear) button to clear any previous calculations and ensure the display shows '0'. The calculator is now ready for use.

5. Návod k obsluze

5.1 Základní aritmetické operace

Perform addition, subtraction, multiplication, and division using the respective keys (+, -, ×, ÷) and the equals (=) key.

5.2 Tax Calculation Function

The calculator features dedicated keys for tax calculations (TAX+, TAX-). This function simplifies adding or subtracting a predefined tax rate.

Stanovení daňové sazby:

1. Stiskněte AC pro vymazání displeje.
2. Stiskněte tlačítko HODNOTIT tlačítko.
3. Enter the desired tax rate (e.g., 8 for 8%).
4. Stiskněte HODNOTIT again to save the tax rate. The display will show the set rate.

Using Tax Functions:

• TAX+: To add tax to an amount, enter the amount, then press TAX+. The display will show the amount including tax.
• TAX-: To subtract tax from an amount, enter the amount, then press DAŇ-. The display will show the amount excluding tax.
• ODVOLÁNÍ: To check the currently set tax rate, press ODVOLÁNÍ.

Image: A table demonstrating the purpose, operation, and result for various tax functions, including setting an 8% tax rate, calculating total amount after tax, and total amount before tax.

5.3 Funkce paměti

• M+: Přičte zobrazenou hodnotu do paměti.
• M-: Odečte zobrazenou hodnotu z paměti.
• MRC: Recalls the memory content. Pressing it twice clears the memory.
• GT (celkový součet): Accumulates the results of all calculations. Pressing it twice clears the grand total.

5.4 Další funkce

• %: Procenttage key.
• √: Square root key.
• Back Space (►): Deletes the last entered digit.
• C/CE: Clear Entry. Clears the last entry without clearing the entire calculation.

5.5 Ergonomický design

Obrázek: Detailní záběr view of the calculator's concave round buttons, designed for comfortable and precise finger placement during operation.

Image: A diagram illustrating the 30-degree ergonomic tilt of the calculator, showing how it provides an optimal viewing angle for users at a desk.

5.6 Instruktážní videa

6. Údržba

6.1 Čištění

Kalkulačku jemně otřete měkkým, suchým hadříkem. V případě odolných nečistot ji lehce otřete.ampen the cloth with water and mild soap, then wipe dry immediately. Avoid using abrasive cleaners, solvents, or spraying liquids directly onto the calculator.

6.2 Péče o baterii

If the calculator will not be used for an extended period, it is recommended to remove the LR44 battery to prevent leakage and potential damage to the device.

6.3 Skladování

Store the calculator in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity. Keep it away from strong magnetic fields.

7. Řešení problémů

• Displej je prázdný nebo tmavý:
  • Ensure sufficient light for solar power.
  • Check if the LR44 battery is correctly installed and not depleted. Replace if necessary.
  • Stiskněte AC resetovat.
• Nesprávné výpočty:
  • Stiskněte AC to clear all previous operations and memory.
  • Verify the input sequence and numbers.
  • Check if any memory functions (M+, M-, GT) are active and affecting the result.
• Klávesy nereagují:
  • Ensure the calculator is powered on.
  • Vyčistěte okolí kláves, abyste odstranili veškeré nečistoty.
  • Pokud problém přetrvává, zkuste vyměnit baterii.

8. Specifikace

9. Bezpečnostní informace

• Nepokoušejte se kalkulačku rozebírat ani upravovat.
• Keep the calculator away from water and other liquids to prevent damage.
• Zabraňte pádu kalkulačky na zem nebo jejímu vystavení silným nárazům.
• Udržujte baterie mimo dosah dětí. Při požití okamžitě vyhledejte lékařskou pomoc.

10. Záruka a podpora

For warranty information and customer support, please refer to the documentation provided with your purchase or contact OSALO customer service directly. Keep your proof of purchase for any warranty claims.