Casio fx-115ES / fx-991ES Calculator User Manual

This document is the user's guide for the CASIO fx-115ES and fx-991ES calculators.

Brand: Casio
Category: Office Equipment
Document type: User Manual
Language: English
Pages: 75
File format: PDF
File size: 924 KB
Published: 06 June, 2012
Updated: 30 September, 2023
Models: FX-991ES, FX-115ES
MD5 checksum: 1E30121C5B83859BD7EBECDD2DF171C4
PDF: Casio fx-115ES / fx-991ES Calculator User Manual PDF

About this 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.

What's inside

Safety Precautions
Handling Precautions
Initializing the Calculator
Display and Indicators
Calculation Modes
Input/Output Format
Error Messages
Power and Battery
Specifications

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)

Frequently asked questions

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.

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