CK57 - Calculator AURORA - Free user manual and instructions
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| Product type | Handheld calculator |
| Brand | Aurora |
| Model | CK57 |
| Display type | 8-digit LCD |
| Power source | Solar panel with LR44 battery backup |
| Battery model | 1 x LR44 |
| Dimensions (L x W x H) | 150 x 80 x 15 mm |
| Weight | 100 g |
| Material | ABS plastic |
| Key functions | Addition, subtraction, multiplication, division |
| Percent function | Yes |
| Square root | Yes |
| Sign change (+/-) | Yes |
| Memory keys | M+, M-, MR, MC |
| Auto power off | Yes, after approximately 8 minutes |
| Operating temperature | 0 to 40 degree Celsius |
| Storage temperature | -20 to 60 degree Celsius |
| Cleaning | Wipe with a soft dry cloth |
| Safety instructions | Do not expose to water or excessive heat |
| Spare parts | Battery is user replaceable |
| Repairability | Repairs only through authorized service centers |
| Warranty | 1 year limited warranty |
Frequently Asked Questions - CK57 AURORA
How do I replace the battery in my Aurora CK57?
Turn off the calculator. Slide the battery cover off the back. Remove the old LR44 battery and insert a new one with the positive (+) side facing up. Replace the cover. Battery replacement is simple and requires no tools.
What type of battery does the CK57 use?
The Aurora CK57 uses a single LR44 button cell battery as backup for the solar panel. It provides stable power in low light conditions.
How do I turn on the calculator?
Press the AC/ON button to turn it on and clear the display. If the display is blank, try pressing it again or check the battery.
Why is the display not showing numbers?
If the display shows nothing, the battery may be depleted or the calculator is exposed to very low light without battery power. Replace the LR44 battery or ensure the solar panel receives adequate light.
How do I clear the memory on my CK57?
To clear memory, press the MC (Memory Clear) button. This resets the stored value to zero without affecting the current display.
How do I calculate percentages?
To calculate a percentage, type the number, press the percentage key (%), and then the operation. For example, 200 + 10 % displays 20, then pressing = gives 220.
Does the calculator have a square root function?
Yes, the CK57 has a square root key (√). Enter a number and press √ to display its square root.
How do I clean my calculator?
Use a soft, dry cloth to wipe the surfaces. Do not use solvents, abrasive cleaners, or submerge the calculator in water.
Can I use the calculator with solar power alone?
Yes, in bright light the solar panel powers the calculator. In dim environments, the LR44 battery takes over to ensure continuous operation.
Is the calculator equipped with automatic shut-off?
Yes, the CK57 features auto power off after about 8 minutes of inactivity to conserve battery life.
User questions about CK57 AURORA
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USER MANUAL CK57 AURORA
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Product information
Brand : AURORA
Model : CK57
Category : Calculator