Craig 4501 Operating Instructions Manual
WARRANTY
Craig
Corporation
warrantstothe
purchaser
of
this
new
Craig
Calculator
thatifthe
machine
or
any
part
thereofinthe
judgmentofCraig
is
proven
to be
defectiveinmaterialorwork-
manship
within
one
year
from
dateoforiginal
purchase,
such
defects
willberepaired
or
replaced
(at
the
Company's
option)
free
of
charge
for
parts
and
labor.
This
warranty
does
not
apply·to
any
product
which
has
been
damagedbyaccidentorwhich
has
been
misused,
abused,
altered,orrepaired
by
anyone
other
than
Craig.
Absenceordeface-
mentofthe
warranty
seal on
the
unit
shall
be
consideredasevidenceofunauthorized
repairs
and
the
warrantyisthereby
immediately
void.
This
warrantyisin
lieuofall
other
warranties
expressedorimplied,
andnopersonisauthor-
izedtoassume
for
Craig
any
other
liability
in
connection
with
the
saleofthis
product.
To
obtain
repairs,
the
Calculator
should
be
delivered,
prepaid,toCraig
Corporation
at
either
address
shown
below.
In-warranty
units
willbereturned
postage
prepaid.
Craig
Corporation
921W.Artesia
Blvd.
Compton,CA90220
Craig
Corporation
50-52
Joseph
St.
Moonachie,
N.J.
07074
INTRODUCTION
Your Craig 4501 Electronic Calculator
represents a significant engineering
achievement resulting in full-size capability
in
a pocket-size package. Major
advances
in
miniaturized computer
circuits using single-chip LSI (Large
Scale Integration), LED (Light Emitting
Diode) display technology, and unique
snap-action keyboard construction have
provided a rugged and reliable unit, and
the
AC
power supply and self-contained
nickel-cadmium rechargeable batteries
permit convenient use even when AC
power
is
not available.
The
Craig 4501 will perform addition,
SUbtraction, multiplication, and division
functions, including chain or mixed
multiplication and divisions, and utilization of a stored constant. Eight digits
are provided for entry and read-out, with
full-floating decimal point and positive
~r
negative sign capability. Additional
display indicators denote power on, low
battery,·overflow,error, and negative
result (minus sign). A "time-out" feature
,
J
to extend batteryoperating timecauses
the display to blank out approximately
15 seconds after the last entry, without
loss of stored information.
It is suggested that the following instructions for operation be read with the
calculator at hand, and that all calculation examples be performedto increase
your familiarity with the unit. A short
outline of operating procedures is also
printed on the backof the calculator
for quick reference.
OPERATION
AC Operation:
Connect
the Charger
unit
to any standard
120
Volt
electrical
outlet
and plug the
3-wire
connector
into
the
Calculator. (Note
that
the
3-wire
connector
is keyed and
should
not be forced
into
the
socket
the
wrong
way.)
After
the above connections,
the
power
switch
maybeturned on and
operation
started. (While
connected
to AC.
the
internal batteries are automatically
charged
whether
the
power
switch
is
"ON"or"OFF".)
Battery Operation:
Disconnect
the
Charger
cord
and turn the
power
switch
"ON".
(An
interlock
switch
in
the
Calculator
socket
will
prevent battery
operation if
the
3-wire plug remains
connected.) With normal use. a full battery
charge can be expected to supply about
5
hoursofworking
time.
NOTE: When the
low
battery
indicator
(L)
on the
display
is lighted,donot continue
battery operation.
This
indicates
need
for
a battery charge. Use of the Calcu-
lator
canbecontinued
during the charge
cycle.
Battery Charging:
Simply
follow
the same
procedure
as in
AC operation. The
Calculator
may be used
during
the charge
period
if desired.
In
order
to fully charge a battery
which
has
been
completely
discharged,14hours is
required. In
most
cases,anovernight
charge
should be adequate if the batteries
have not been fully discharged.
NOTE:
Although
no damage
will
result
from
prolonged
periods with the Charger
connected, it is advisable to remove the
Charger
cord
when
the
Calculator
is not
in use after a full recharge cycle.
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