GR-120 - Calculator CASIO - Free user manual and instructions
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| Product Type | Desktop Calculator |
| Brand | Casio |
| Model | GR-120 |
| Display | 12-digit LCD |
| Power Source | Solar and battery (LR44) |
| Dimensions (W x D x H) | Approx. 148 x 118 x 30 mm |
| Weight | Approx. 130 g (including battery) |
| Key Functions | Basic arithmetic, percentage, square root, memory |
| Auto Power Off | Yes, after approximately 7 minutes of inactivity |
| Material | Plastic casing |
| Cleaning | Wipe with a soft, dry cloth. Do not use solvents. |
| Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Battery Type | LR44 or equivalent |
| Battery Life | Approx. 3 years with normal use |
| Repairability | Not user-serviceable. Contact Casio service center. |
| Safety | Keep away from moisture and extreme temperatures. |
Frequently Asked Questions - GR-120 CASIO
How do I turn on the Casio GR-120?
The calculator turns on automatically when exposed to light or press the AC key. If using battery, press ON.
What type of battery does the GR-120 use?
It uses one LR44 (or equivalent) alkaline button cell battery.
How do I replace the battery?
Slide the battery cover off, remove the old battery, insert a new LR44 with the positive side up, and replace the cover.
Why is my calculator not working?
Check if the solar panel is receiving light. If not, replace the battery. Also ensure the ON key was pressed.
How do I clear an error?
Press the AC (All Clear) key to reset the calculator.
Can I use this calculator for complex math?
The GR-120 is a basic calculator. It performs addition, subtraction, multiplication, division, percentage, and square root but not scientific functions.
How do I perform a percentage calculation?
Enter the number, press %, then the percentage amount, and press =.
Does the calculator have memory?
Yes, it has M+, M-, MR, and MC keys for basic memory functions.
How do I clean the calculator?
Wipe the exterior with a soft, dry cloth. Do not use any liquids or chemical cleaners.
What should I do if the display is dim?
Ensure the solar panel is in a bright area. If using battery, replace it. The display may also have contrast adjustment via a small wheel on the side.
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