2
H ow to O pe ra te
2nd function key
Pressing this key will enable the functions
written in yellow above the calculator but-
tons.
ON/C, OFF key
D irect function
Mode key
This calculator can operate in three different
modes as follows.
<Example>
W ritten in yellow above
the O N /C key
<Power on>
<Power off>
1 . K E Y L AY O U T
•Mode = 0; normal mode for
performing normal arithmetic
and function calculations.
•Mode =
1
; STAT-
1
mode for
performing 1-variable statisti-
cal calculations.
•Mode = 2; STAT-2 mode for
performing 2-variable statisti-
cal calculations.
If the calculator fails to operate normally,
press the reset switch on the back to
reinitialise the unit. The display format and
calculation mode will return to their
initial settings.
RESET
2 . R E S E T S W I T C H
Reset switch
RESET
2nd function
[Normal mode]
[STAT-1 mode]
[STAT-2 mode]
N OT E :
Pressing the reset switch will erase any data
stored in memory.
≈
R ead B efore Using
≈
This operation guide has been written based on the EL-531V, EL-509V, EL-531VH, and
EL-509VH models. Some functions described here are not featured on other models. In
addition, key operations and symbols on the display may differ according to the model.