1. Introduction
The OSALO OS-3TV is a portable office desktop calculator designed for efficiency and ease of use. It features a large, clear 12-digit display and durable, comfortable keys. This calculator is powered by both solar energy and a backup battery, ensuring extended service time. It includes standard functions such as arithmetic operations, memory keys, backspace, percent, and mark-up/mark-down calculations, making it ideal for office, home, and school environments.
2. Product Features
- Large 12-Digit Display: Clear and easy-to-read display reduces visual fatigue.
- Dual Power Supply: Operates on solar power with a 1x AAA battery backup (not included) for continuous use.
- Durable Plastic Keys: Comfortable and robust keys designed for frequent use.
- Grand Total (GT) Function: Calculates the sum of all results.
- Memory Functions: M+, M-, MRC (Memory Recall/Clear) for complex calculations.
- Backspace Key: Corrects entry errors easily.
- Percent (%) Key: For percentage calculations.
- Mark-up/Mark-down (MU/RATE) Key: Facilitates profit margin calculations.
- Tax Calculation Keys: Dedicated TAX+ and TAX- keys for quick tax adjustments.
- Double Zero (00) Key: Speeds up entry of large numbers.
- Square Root (√) Function: For mathematical operations.
- Portable Design: Compact size suitable for desktop use or on-the-go.
- Tilted Display: Ergonomically designed for easy viewing from various angles.
3. Specifications
| Attribute | Value |
|---|---|
| Brand Name | OSALO |
| Model Number | OS-3TV |
| Max. Digits | 12 |
| Power Source | Dual Power Supply (Solar & Battery) |
| Battery Included | No (Requires 1x AAA battery) |
| Material | Plastic |
| Style | Pocket / Desktop |
| Use | Count / General Calculation |
| Certification | CE |
| Origin | Mainland China |
| Dimensions (L x W x H) | 185mm x 134mm x 43mm |
4. Setup
4.1 Battery Installation
- Locate the battery compartment cover on the back of the calculator.
- Slide the cover in the direction indicated by the 'OPEN' arrow to remove it.
- Insert one AAA 1.5V battery, ensuring the correct polarity (+/-) as marked inside the compartment.
- Replace the battery compartment cover by sliding it back until it clicks into place.
The calculator also utilizes solar power. Ensure the solar panel is exposed to sufficient light for optimal performance and to conserve battery life.
5. Operating Instructions
This section details the functions of the keys on your OSALO OS-3TV calculator.
5.1 Basic Operations
- Number Keys (0-9, 00): Enter numerical values. The '00' key allows for quick entry of double zeros.
- Arithmetic Operators (+, -, ×, ÷): Perform addition, subtraction, multiplication, and division.
- Equals Key (=): Displays the result of a calculation.
- Decimal Point (.): Enters a decimal point.
5.2 Clear Functions
- C/CE (Clear Entry/Clear): Press once to clear the last entry. Press twice to clear the entire calculation (except memory).
- AC (All Clear): Clears all entries and calculations, including memory.
5.3 Memory Functions
- M+ (Memory Plus): Adds the displayed number to the memory.
- M- (Memory Minus): Subtracts the displayed number from the memory.
- MRC (Memory Recall/Clear): Press once to recall the value stored in memory. Press twice to clear the memory.
5.4 Advanced Functions
- GT (Grand Total): Sums up the results of all previous calculations.
- % (Percent): Used for percentage calculations. For example, to calculate 10% of 200, enter 200 × 10 %.
- √ (Square Root): Calculates the square root of the displayed number.
- MU (Mark-up/Mark-down): Used for profit margin calculations. For example, to calculate the selling price with a 25% profit margin on a cost of 80: enter 80 ÷ 25 MU.
- TAX+ / TAX- (Tax Rate): These keys are used for tax calculations. You may need to set the tax rate first (refer to specific calculator models for tax rate setting instructions, if applicable, though this model typically uses a pre-set or user-defined rate via a sequence of operations not explicitly detailed here). Once set, enter a value and press TAX+ to add tax, or TAX- to subtract tax.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the calculator. Do not use abrasive cleaners or solvents.
- Storage: Store the calculator in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Replacement: Replace the AAA battery when the display becomes dim or unresponsive, even in good lighting conditions.
- Avoid Dropping: Protect the calculator from impacts and drops to prevent damage to internal components or the display.
7. Troubleshooting
- Display is blank or dim:
- Ensure the calculator is in a well-lit area for solar power.
- Check and replace the AAA battery if necessary.
- Incorrect calculations:
- Press the AC key to clear all previous calculations and memory.
- Double-check your input and the sequence of operations.
- Keys are unresponsive:
- Clean around the keys to ensure no debris is obstructing them.
- If the issue persists, try replacing the battery.
8. User Tips
- The dual power supply (solar and battery) ensures reliable operation. Keep the solar panel exposed to light to extend battery life.
- The large display and comfortable keys make counting and calculations easy and efficient for daily tasks.
- Its pocket-style design and CE certification highlight its portability and adherence to quality standards.
9. Warranty and Support
For warranty information and customer support, please refer to the seller's policies or contact the point of purchase. Keep your purchase receipt as proof of purchase.
