Casio fx-991ES PLUS Manual De Usuario

E-42

For details about initialized settings, see “Configuring the Calculator 
Setup”.

4. Initialize all modes and settings by performing the following operation: 

(CLR)(Setup)(Yes).

A low battery is indicated by a dim display, even if contrast is adjusted, or by 
failure of figures to appear on the display immediately after you turn on the 
calculator. If this happens, replace the battery with a new one. 
Important: Removing the battery will cause all of the calculator’s memory 
contents to be deleted. 

1. Press 

(OFF) to turn off the calculator. 

• To ensure that you do not accidentally turn on power while replacing the 

battery, slide the hard case onto the front of the calculator (fx-991ES 
PLUS). 

2. Remove the cover as shown in the illustration and replace the battery, 

taking care that its plus (+) and minus (–) ends are facing correctly. 

  

 

Screw

 Screw 

Screw

3. Replace the cover.

4. Initialize the calculator: 

(CLR)(All)(Yes)

• Do not skip the above step! 

Power Requirements:
  fx-570ES PLUS: AAA-size battery R03 (UM-4) 

s 1

  fx-991ES PLUS: Built-in solar cell; button battery LR44 (GPA76) 

s 1

Approximate Battery Life:
  fx-570ES PLUS: 17,000 hours (continuous display of flashing cursor)
  fx-991ES PLUS: 3 years (based on one hour of operation per day)

Power Consumption: 0.0002 W (fx-570ES PLUS)

Operating Temperature: 0°C to 40°C (32°F to 104°F)

Dimensions: 
  fx-570ES PLUS: 13.8 (H) 

s

   

          

1

/

2

 (H) s

1

/

8

 (W) s

3

/

8

 (D)

  fx-991ES PLUS: 11.1 (H) 

s

                              

3

/

8

 (H) s

1

/

8

 (W) s

3

/

8

 (D)