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HP 25 User Manual

HP 25
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56
Function Keys
For
example,
to recall
Avogadro's
number:
Press Display
10.00
I 6.0200000 23
Recalling a
number
causes
the
stack
to lift
unless
the
preceding
keystroke
was
mmiD
,liD
or
m
(more
abo
ut m later).
When
you recall a
number,
it
is
copied
from
the
storage
register
into
the
display,
and
it
also
remains
in
the
storage
register.
You
can
recall a
number
from a
storage
register
any
number
of
times
without
altering
it-the
number
will
remain
in
the
storage
register
as a 10-digit
number
with a two-digit
exponent
of
10
until
you
overwrite
it by
storing
another
number
there,
or
until
you
clear
the
storage
registers.
Example:
Three
tanks
have
capacities
in
U.S.
units
of
2.0,
14.4,
and
55.0 gallons,
respectively.
If
one
U.S. gallon
is
approximately
equal
to 3.785 liters,
what
is
the
capacity
of
each
of
the
tanks
?
Method:
Place
the
conversion
constant
in
one
of
the
storage
registers
and
bring it
out
as
required
.
Press Display
liD 10.00 I
D
0KJ
3 1 0.
000
1
Display
mode
set.
3.785
EmJo
,13.785 1
Constant
placed
in
register
Ro·
20
1 7.570 I
Capacity
of
I st
tank
in
liters.
14.4
_0
0 154.504 1
Capacity
of
2nd
tank
in
liters.
55
go
0 1 208.175 I
Capacity
of
3rd
tank
in
liters.
D
0KJ
2 1208.18 1 Display mode reset.
Clearing Storage Registers
To
clear
the
number
from a single
storage
register, simply
store
the
quantity
zero
in
the
register
by pressing@]
EmJ
followed by
the
number
key
(@]through[IJ)
of
the
register
address.
To
clear
data
from all manual
storage
registers
at
once,
without
affecting
data
in
other
portions
of
the
calculator,
press
D
~
·
This
places
zero
in
all eight
of
the
storage
registers.
Of
course,
turning
the
calculator
0
FF
also
clears
all registers.

Table of Contents

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HP 25 Specifications

General IconGeneral
Power SourceRechargeable battery pack
Programming Steps49
Release Year1975
FunctionsTrigonometric, logarithmic, statistical
TypeScientific
Dimensions148 x 80 x 14 mm

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