1. Produto rematadoview
The UNIONE UC-500M is a desktop scientific calculator designed for clarity and ease of use. It features a large 2-line display and 240 functions, making it suitable for various academic and professional applications, including general math, pre-algebra, algebra 1 and 2, geometry, trigonometry, statistics, science, biology, and finance.

Image: The UNIONE UC-500M scientific calculator, showcasing its large display and key layout.
Características principais:
- Pantalla de 2 liñas: Permite simultáneo viewing of expressions and results.
- 240 funcións: Comprehensive set of scientific functions for diverse calculations.
- Teclado grande: Designed for comfortable and accurate input, reducing typos.
- Deseño ergonómico: Features a 15-degree tilt for improved readability and reduced wrist strain during extended use.
- Potencia dual: Operates on both solar power and a single AAA battery (included).
- Dimensións: Approximately 110 x 180 x 35mm (4.3 x 7 x 1.3 inches).
2. Configuración
Instalación da batería:
The UNIONE UC-500M calculator requires one AAA battery, which is included. The calculator also features solar power for extended battery life.
- Localiza a tapa do compartimento das pilas na parte traseira da calculadora.
- Deslice a tapa na dirección indicada pola frecha.
- Insert one AAA battery, ensuring the positive (+) and negative (-) terminals are correctly aligned as shown inside the compartment.
- Volva colocar a tapa do compartimento da batería deslizándoa de volta ao seu lugar ata que faga clic de forma segura.

Imaxe: View of the battery compartment on the back of the calculator, showing where to insert the AAA battery.
Encendido/apagado:
- Para activar a calculadora, prema o botón [ACTIVADO] botón.
- The calculator will automatically turn off after a period of inactivity to conserve power.
3. Instrucións de funcionamento
Cálculos básicos:
Enter numbers and operations using the numeric keypad and function keys. The 2-line display shows the input expression on the top line and the result on the bottom line.
- Addition, Subtraction, Multiplication, Division: Usa o [+], [-], [×], [÷] chaves.
- Igual: Preme [=] para mostrar o resultado.
- Borrar entrada/Borrar todo: Preme [DOS] to delete the last entry. Press [CA] to clear all entries and reset the calculation.

Image: The calculator's 2-line display showing a trigonometric calculation (sin 60) and its numerical result.
Funcións científicas:
The UC-500M includes 240 diverse functions. Many functions are accessed by pressing the [MAYÚS] tecla seguida da tecla de función desexada.
- Fraccións: Usa o [d/c] or [ab/c] key for easy entry and conversion of fractions and mixed numbers.
- Funcións trigonométricas: pecado, [cos], bronceado e as súas funcións inversas ([MAYÚS] + function key).
- Funcións logarítmicas: [rexistro], [ln].
- Potencias e raíces: [x²], [√], [x³], [³√].
- Parénteses: Use [(] e [)] for complex expressions.

Imaxe: Unha detallada view of the calculator's keypad, highlighting the scientific function keys like sin, cos, tan, log, and fraction buttons.
Cambio de modo:
The calculator offers 6 representative modes for quick switching between calculation functions. Press the [MODO] key to cycle through available modes.
- COMP (Compute): Standard calculation mode.
- SD (Standard Deviation): Single-variable statistics.
- REG (Regression): Two-variable statistics.
To change angle units (Degrees, Radians, Grads), double-click the [MODO] key and select the desired unit.
4. Mantemento
Coidado xeral:
- Keep the calculator clean by wiping it with a soft, dry cloth. Avoid using abrasive cleaners or solvents.
- Do not expose the calculator to extreme temperatures, humidity, or direct sunlight for prolonged periods.
- Evite deixar caer a calculadora ou sometela a impactos fortes.
Substitución da batería:
When the display becomes dim or unresponsive, it may be time to replace the AAA battery. Follow the battery installation steps outlined in Section 2. Ensure proper disposal of old batteries according to local regulations.
5 Solución de problemas
Problemas comúns e solucións:
- A pantalla está en branco ou escura:
- Check if the calculator is turned on by pressing [ACTIVADO].
- Ensure sufficient light for solar panel operation, or replace the AAA battery if necessary. - Resultados de cálculo incorrectos:
- Verify the input expression on the top line of the display.
- Ensure the calculator is in the correct mode (e.g., COMP for standard calculations, correct angle unit for trigonometric functions).
- Clear previous calculations by pressing [CA] and re-enter the calculation. - As teclas non responden:
- Clean the keypad area to remove any debris.
- If the issue persists, try removing and reinserting the battery to perform a soft reset.
Resetting the Calculator:
If the calculator behaves erratically, a full reset may resolve the issue. To perform a reset, turn off the calculator, then remove the AAA battery. Wait for approximately 30 seconds before reinserting the battery and turning the calculator back on. Note that this will clear any stored memory or settings.
6. Especificacións
| Marca | UNIÓN |
| Modelo | UC-500M |
| Tipo de calculadora | Científico |
| Tipo de visualización | 2-Line LCD |
| Número de funcións | 240 |
| Fonte de enerxía | Solar Powered, 1 AAA Battery (included) |
| Dimensións do artigo (L x W x H) | 180 x 110 x 35mm (7 x 4.3 x 1.3 polgadas) |
| Tamaño da pantalla | 9 Centímetros |
| Fabricante | UNIONE COMMERCE |

Image: The UNIONE UC-500M calculator displayed alongside a table of its key product specifications.
7. Garantía e soporte
Información da garantía:
The UNIONE UC-500M Scientific Calculator comes with a 2 ano de garantía desde a data de compra. Esta garantía cobre defectos de fabricación e avarías en condicións de uso normal. Conserve o comprobante de compra para reclamacións de garantía.
Atención ao cliente:
For technical assistance, troubleshooting, or warranty inquiries, please contact UNIONE customer support through the retailer where the product was purchased or refer to the official UNIONE websitio para información de contacto.