Key facts
- Brand
- Casio
- Model
- FX-115ES
- Category
- Office Equipment
- Industry
- Electronics
- Documents
- 4
- Languages
- EN · ES
- Last added
- 2012-06-06
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Casio fx-115ES / fx-991ES Calculator User Manual
This guide explains how to set up and operate the Casio fx-115ES and fx-991ES scientific calculators. It covers safety and handling precautions, initialization of the calculator, display features, calculation modes, input/output formats, and error handling procedures.
The manual also lists technical specifications such as power requirements, battery type, dimensions, weight, and includes detailed steps for battery replacement and auto‑power‑off behavior.
Casio FX-115ES specifications
| Solar Cell | Built into the front of the calculator |
|---|---|
| Button Battery | G13 Type (LR44) × 1 |
| Battery Life | Approximately 3 years |
| Weight | 105 g (3.7 oz) |
All Casio FX-115ES documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How do I reset the calculator to its default settings?
Press [SET] [9] (CLR) [3] (All) [≡] (Yes) to initialize all modes and clear memory.
What does the "S" indicator on the display mean?
The "S" indicator shows that the keypad has been shifted by pressing the SHIFT key.
What is the initial default calculation mode?
The initial default calculation mode is the COMP Mode.
How often should the battery be replaced?
You should replace the battery at least once every three years, even if operating normally.
How do I replace the battery?
Remove the old battery, insert a new G13 (LR44) battery, and ensure the positive and negative contacts are correctly aligned.
What are the operating temperature limits?
The calculator can be used between 0 °C and 40 °C.