P
ocket
R
efeRence
G
uide
— 5
i
Inch Key ─
enters or converts to
inches. Entry can be whole or decimal
number. Also used with the
/
key for
entering fractional inch values (for
example,
9 i 1 / 2
). Repeated
presses during conversions toggle
between fractional and decimal
inches.
/
Fraction Bar Key ─
used to enter
fractions. Fractions can be entered as
proper (1/2, 1/8, 1/16) or improper
(3/2, 9/8).
m
Meter Key ─
enters or converts to
meters.
Convert Key Functions
Ç
Convert Key
─
used with the
dimensional unit keys to convert
between dimensions, the
project keys
to calculate
material quantities, or with other
keys to access special functions.
Ç –
Change Sign (+/-)
─
toggles
displayed value to positive or
negative.
(cont'd)
Ç ÷
Square root (
√
¯
x
)
─
finds
square root of value in display.
Ç x
Value Squared (
x
2
)
─
finds
square of value in display.
Ç %
Pi (
π
)
─
constant 3.141593.
Memory
Ç +
M+
─
adds or stores a value in
the semi-permanent memory (for
example,
1 5 0 Ç +
).
Semi-permanent means the
value is cleared when the
calculator is turned off.
Ç –
Ç +
M-
─
subtracts a value from the
semi-permanent memory
(for example,
1 5 0 Ç –
Ç +
subtracts 150 from the
memory).
Ç =
Mr
─
recalls memory value (for
example, if 150 has been stored
in memory, pressing
Ç =
will
display 150).
Ç o
MC
─
clears memory value.
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Summary of Contents for 8509
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