Key facts
- Brand
- Casio
- Model
- FX-991MS
- Category
- Other Electronics
- Industry
- Electronics
- Documents
- 7
- Languages
- EN · ES · ZH
- Last added
- 2012-05-09
Start here
Casio fx-95MS/100MS/115MS/570MS/991MS User Guide
This guide provides safety precautions, battery handling instructions, and step‑by‑step procedures for removing and re‑installing the calculator cover. It also explains the basic and scientific functions, modes of operation, and how to troubleshoot common error messages.
Technical specifications are listed for the fx-95MS model, including battery type, expected battery life, dimensions, weight, power consumption, and operating temperature range. The manual ends with warranty and disposal information. This manual is written in Spanish.
Casio FX-991MS specifications
| Power Supply (fx-570MS) | Single G13 Type button battery (LR44) |
|---|---|
| Dimensions (fx-570MS) | 12.7 mm (H) × 78 mm (W) × 154.5 mm (D) |
| Weight | 105 g (3.7 oz) including battery |
| Battery Life (fx-570MS) | Approximately 9,000 hours continuous display |
| Operating Temperature | 0 °C to 40 °C (32 °F to 104 °F) |
All Casio FX-991MS documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
- Casio fx-570MS and fx-991MS User Manual 30 p
- CASIO FX-570MS/991MS Manual
- Casio fx-95MS/100MS/115MS/570MS/991MS User Guide 44 p
- Casio fx-95MS / fx-100MS / fx-115MS / fx-570MS / fx-991MS User Manual 44 p
- Casio fx-95MS/100MS/115MS/570MS/991MS User Manual 2 p
- CASIO fx-570MS fx-991MS Manual
- Casio fx-570MS / fx-991MS User Manual 31 p
Questions answered in these manuals
How do I remove the calculator’s cover?
Hold the cover as shown in the illustration and slide the unit out of the cover.
What are the dimensions of the calculator?
The calculator measures 19.5 mm × 78 mm × 155 mm.
From: Casio fx-95MS / fx-100MS / fx-115MS / fx-570MS / fx-991MS User Manual
What should I do with the battery if I won’t use the calculator for a long time?
Remove the battery and store it safely away from children.
From: Casio fx-95MS / fx-100MS / fx-115MS / fx-570MS / fx-991MS User Manual
How often should the battery be replaced?
For the fx‑95MS and fx‑100MS the battery should be replaced every 2 years, while the fx‑115MS, fx‑570MS and fx‑991MS require replacement every 3 years.
What does the dual‑line display show?
The upper line shows the entered expression, and the lower line shows the calculation result.
How many steps can the CALC storage hold?
The CALC storage can hold up to 79 steps for a single mathematical expression.