EC505 - Calculator AURORA - Free user manual and instructions
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| Brand | Aurora |
| Model | EC505 |
| Product Type | Calculator |
| Display | 8-digit LCD |
| Dimensions | Approx. 10 x 6 x 1 cm |
| Weight | Approx. 50 g |
| Power Source | 1 x LR54 battery |
| Functions | Basic arithmetic, percentage, square root, memory |
| Auto Power Off | Yes, after approx. 7 minutes |
| Keyboard | Plastic keys, tactile feedback |
| Case Material | Plastic |
| Color | Black/white (typical) |
| Cleaning | Wipe with a soft, dry cloth |
| Safety | Keep away from water and extreme temperatures |
| Battery Replacement | Easy access via sliding cover |
| Spare Parts Availability | Battery available at electronics stores |
| Repairability | Not user-serviceable beyond battery replacement |
| Included Accessories | None |
| Warranty | Standard 1 year (check retailer) |
Frequently Asked Questions - EC505 AURORA
How do I turn on the Aurora EC505 calculator?
Press the ON/C button to turn on the calculator. It will automatically power off after a period of inactivity.
What type of battery does the EC505 use and how do I replace it?
It uses one LR54 button cell battery. Slide the battery cover on the back to open, replace the battery with the correct polarity, and close the cover.
How do I perform a basic calculation like addition?
Enter the first number, press +, enter the second number, then press = to see the result.
What does the 'MU' button do?
The MU button is used for markup calculations. For example, to calculate a 20% markup on 100, enter 100, press MU, enter 20, then press =.
How can I clear a wrong entry?
Press CE (Clear Entry) to clear the last number entered, or press ON/C to reset the current calculation.
Why is my calculator not turning on?
Ensure the battery is installed correctly with the + side up. If the battery is dead, replace it with a new LR54 battery.
How do I calculate a percentage?
To find 10% of 200, enter 200, press ×, enter 10, then press %. The result will be 20.
What should I do if the display shows a faint or flickering numbers?
This usually indicates a low battery. Replace the battery with a fresh LR54 cell.
Can I use the calculator in direct sunlight?
The LCD display may become hard to read in very bright light. Use in a shaded area for best visibility.
How do I clean the calculator?
Wipe the exterior with a soft, dry cloth. Do not use water, solvents, or abrasive cleaners.
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