Lloyd's Accumatic 20 User manual
INTRODUCTION
Congratulations
on
the
purchase
of
your
new LLOYD'S Accumatic™ 20 Elect-
ronic Calculator. You can be assured
of
years
of
enjoyable, trouble-free service
if
you
use it as outlined
in
these pages.
This calculator
is
one of awide ranging
line
of
personal electronic products
that
LLOYD'S has
to·
offer;
personal,
because
all
LLOYD'S products are
designed
to
meet
your
needs for high
quality performance and dependability
at
areasonable price. If you already
own aLLOYD's Stereo, Cassette
Re-
corder, Portable Radio
or
Digital Clock
Radio,
you
know
what
we
maen.
LLOYD'S enjoys an excellent reputa-
tion as
the
manufacturer
of
avariety
of
Home Entertainment Systems.
Now
that
you have purchased one of
the LLOYD'S line
of
calculators, you
may be interested
in
knowing
that
all
LLOYD'S calculators employ
the
most
advanced microelectronic technology
available to date. Modern technology
has made it possible
to
miniaturize
most
of the electronic circuitry
in
your
calCulator so
that
it fits
on
achip
of
silicon which can pass through the
eye
of
aneedle! No wonder we can make a
calculator which fits in apocket!
Why
not
take afew minutes
to
read this
manual for the full story
on
the
far-reaching capabilities
of
your
new
microelectronic calculator.
f···
BEFORE
OPERATION
OF
YOUR CALCULATOR
Your cafcUlator
operates
from
four
AA penlight batteries, either
Carbon-Zinc,
Atkaline
orNickelCadmium.AHhough they
have
a
higher
initial cost, Alkaline batteries
and
Rec.hargeable batteries
will
giv£
you
the.
best
overall
value.
The
calculator
can
also
be
operated
using
LlOYO'S
AC
Adaptor
Model
YA·7247
(120Vf60H,1
or
Model
YA·7565
mOVf50 Hll.
CAUTION:
The
batteril1S
supplied
with
this
unit
are
not
reehargeable.
To
avoid
possible
<
damage
to
unit.
these
batteries
should
be
removed
when using LLOYD'S AC
Adaptor
VA-7247
U20V/60Hz)
or
YA-7585
(220V/50Hzl_
HOW
TO
CHANGE
BATTERIES
To change
the
batteries, make sure the power switch
is
in the
'OFF'
position. Remove
the
battery
access cover
from
the
back
of
the
calculator by sliding it
toward
the
bottom
of
the
machine. Remove
and dtSc2rd the. old
batter~s.
When inserting new batteries, observe
the battery pOlarity. The
(+}
pole
of
each
battery
must
correspond
with
the
(+) indication in
the
battery
compartment.
Damage
to
the
calculator can be caused
by
incorrect placement
of
the
batteries.
~
Adimly lighted display is
an
indication
that
the
battery
voltage is
low.
This
is
the time
to
replace the batteries with fresh ones
lit
mchargeabfes are being used, recharging is required).
It
tbe
batteries
becnme
too
low,
the
calculator
will
not op.erate.
HOW
TO USE AN AC ADAPTOR
Your calculator may also
be
operated
from
At
with
the
use
of
LLOY[J'S
AC
Adaptor
Model
YA·7247
{120V!60H,1
or
Model
YA·7585 (220V/50f1z). -Batteries may be left in
the
calculator when
using
it
on
AC.
However.
if
the
calculator
i~
being used
on
AC only
Over
long periods
of
time,
the
batteries
should
be
removed
to
prevent
pDssible
damage
from
battery
leakage.
The
At
Ad-aptor
wilt
also
charge
Rechargeable
Alkaline
and
Nickel-Cadmium
(Nitad)
balleries.
CAUTION: To avoid damage, use only
lLOYD'S
ModEi YA-7247
(l20VI60H,1
or
Model
YA·7565
(220Vl50Hll
AC
Adaptors
with
your c.akuiatuL
To
connect
the
adaptor,
follow these
four
steps in the order
outlined;
1.
Make
sure
that
th~
power
switch
is
in
the
'0
FF' position.
Z.
Connect
the
adaptor
plug
into
the calculator socket.
3.
Plug
the
adaptor
into
the
power
nutJ.et.
4. Move
the
calculator power switch
to
the
'ON'
position.
NOTE; When
the
AC
Adaptor is used only to recharge Nicad
or
Rechargeable Alkaline batteries, it
is
not
necessary
to
moV'e
the
calculator switch
to
the
'ON'
positiOTl,
CAUTION: When
the
calculator
is
not
in
use, disconnect
the
AC
Adaptor from 1he
AC
outlet
AND from the calculator. leaving
the
AC
Adaptor plugged into the calculator
without
it also being plugged
into an
ACoutlet
win drain
the
batteries.
KEYBOARD ORGANIZATION
The
following
is
abrief explanation
of
the
function
of
each
key
and
indicator
found
00 the keyboard
of
the Accumatic'TM
20.
DIGIT
ENTRY
KEYS
IQ)
Through
~:
Pressing
one
of
these keys wilt
enter
that
diqit
into
the rightmost display position. Previously
entered
digits
will
be
shifted one position to the feft.
DECIMAL
POINT
ENTRY KEY
G:
Depression
of
this key
win
correctly position
the
decimal
point
in
your
entries.
e
ARITHMETIC FUNCTION KEYS
S.
EJ.
lEI,
ffi: Depression of
anyone:
of
these
keys
tens
the
calculator what operation
to
perform with the next number entered.
During calculations, intermediate results are also displayed when these
keys are depressed.
EQUAL
KEY
§:
when the
El
key
is
depressed, the answer will appear on the
display.
PERCENT
KEY
IPS:
DepressiDn
of
this key causes the number un the
display
to
be
expressed as apercentage.
CHANGE
SIGN
KEY
El'3:0epressiDn
of
this key changes the
sign
of
the
displayed number.
To entet anegative number,
enter
the
number first,
then
depress
this
key.
REGISTER
EXCHANGE KEY
~;Oepfession
of
this key exchanges
the
contents
of
the display (xl
register and
the
cQnstant
(v}
register.
CLEAR
AND
CLEAR
ENTRY KEY
©:
Oepression
of
this key performs the following functions:
1. Resets error
or
overflow indicator. This dues not clear the display
or memory.
Press
If}
ONCE.
2. Clears the displav register (wrong entryLPrevious entries and the
arithmetic mode
set
are
not affected. Press ©ONCE.
3.
Two
successive
dllpressions
of
the
clear
[g
key
will
clear
all
registares EXCEPT
lhe
memory register.
MEMORY OPERATION
Depression
of
the
following keys perform
the
various memory
operations.
I.
Ii!ffi
:Adds
the
contents
of
the
displey (Xl register
to
the
contents
of
the
memory. The display
(X)
resister and all previous
operations are unaffected
by
thIs operation.
2.
1M3
;Subtracts
the
contents
of
the
(Xl resister from
the
con-
rents
of
memory_
The
(Xl
resister
and
all
previous
operation
are
unaffected
by
tbis operation.
S.
~
:Clears
the
memory tsets memory contents
to
zero) without
disturbing
othercalcufator
modes or resisters.
4.
.MBl
;Recalls -the contents of memory
to
thE:
display without
clearing
the
memory_
MEMORY INDICATOR
This indicator
is
a
dot
which wilt light
in
the-leftmost display position
whenever
memory
contents
are
OOlHero.
NEGATIVE NUMBER INDICATOR
This
!nditatot
is
located
in
the leftmost displav position and lights
whenve-r
negative
numbers
Of
cndit
balances
are
displayed.
OVERFLOW
(ERROR)
INDICATOR
This indicator is located in
the
leftmost display position. Any answer
or subtotal exceeding eight digits to
the
left
of
the
decimal
point,
overflow indicator
"C'
lights and eight most siqnfficant digits are
displayed.
The
position
of
the
decimal
point
in
the
overiloWlld displey
telts
you
how
many
digitS'
areoll'erflowed.
For example, if
the
overfloWlld display readsC1234.5fl78, thadecimal
point indicates four overflowed (counting from
the
left). The actual
answer
is
12345678oooD.
-.
Two
,u",
...
iYe
depression
of
the
clear
lQ
key
will
reset
the
calculator
and
only
a
zero,
in
the
rightmost
po,~ion,
will
appear
on
the
display.
EXAMPLE PROBLEMS
The
following example problems show
you
how
easy
it
is
to
use
the
Accumatic™20 Calculator.
The
calculator should
be
turned
on
using
the
On-Off
switch located
at the top edge of tbe calculator.
When
the calculator
is
'011'. azero
wilt
appear
in
the rightmost display position.
You
are now ready to
begin.
MACHINE
CAPACITY
l.
The
Capacity
oi
the
machme
IS
0.0000001
to
99,999,999
00
""'0
10'·1).
2.
The
calculator
displays.
whole numbers
up
to eight digits.
3.
The
calculator
displays
decimal
numbers
up
to
eight
digits.
For
decimal answers exceeding eight digits, the least significant
decimal digits are automaticaflv suppressed
to
prevent overflow.
4.
The
calculator displays numbers
less
than 1up to sewn digits.
A-
zero always appears to the left of the decimal point
if
the number
is
less
than
one.
Multiplv
Mode
is
still set
fQr
Auto-
Constant
Sets-
Multiply
Mode
Negative
Indicator tights
COMMENTS
Re,ul'
3-7
Negative
Indicator lights
Negative
Indicator
Goes
Out
Sets Subtract
Mode
Selt Subtract
Mode
SetS'
Subtract
Mode
8 8
EJ
4
MULTIPLICATION
Example:
5.2
x
6.3
"32.76
5.2 5.2
o
5.2
6.3 6.3
El
32.76
MIXED ADDITION, SUBTRACTION
Example:
3 - 7 +
804
3 3
83
7 7
El
-4
SUBTRACTION
Example:
6- 2• 4
ENTRY
OISPLA
V
6 6
86
2 2
EJ
4
NEGATIVE BALANCE
Example: 4 - 9
;.
-5
4 4
EJ
4
9 9
EJ
-5
Set,
Add
Mode
COMMENTS
ADDITION
Example:
5+308
ENTRY
DISPLAY
5 5
8 5
3 3
o8
MIXED MULTIPLICATION. DIVISION
Example:
8 x 6 +
l2
""
4
88
IE]
8Sots
Multiply
Mode
6 6
IB
48
Result 8 x 6
12 12
EJ
4
Sets Multiply
Mode
2'
2'
2'
POWERS
Example:
24=
16
2 2
o2
B 4
El
8
B16
AUTOMATIC DISCOUNT
Exampla: A$15.25
Item
Discounted
20%
ENTRY DISPLAY
COMMENTS
15.25 15.25
EJ
15.25
20 20
l!!l 3.05
211%
of 15.25
El
12.20
.COMBINED
M~RK·UP.
DISCOUNT
Example:
A$31.25 Item
Discounted
26%
Plus
5%
Tax
31.25 31.25
EJ
31.25
20 20
l!!l 6.25
211%
of 31.25
EI
25.00
Discounted
Price
5 5
l!!l
1.25
5%
of 25.00
El
26.25
COMMENTS
Sets
Divide
Mode
N-o
Need
to
Key~tn
l..eading
Zero
Converts
5
to
Percentage
Format.
Sets Multiply
Mode
DIVISION
Example: 12.4 , 0 4
~
31
ENTRY
D1SPLA
V
12.4 12.4
IB 12.4
.4 0.4
B
31
PERCENTAGE
Example: 5
....
of
30" 1.5
5 5
l!!l
0.05
IE]
0.05
30
30
EJ
1.5
AUTOIlllATIC IIIlARK-U.P
Example: A$47.25 Purchase Plus
4%
Tax
47.25 47.25
B47.25
4 4
l!!l
1.89
4%
of 47.25
B49.14
RECIPROCAL MULTIPLICATION
Example:
1f4
=0.25 Example:
4.
~.
4.4=
258
ENTRY
DISPLAY
COMMENTS
ENTRY
DISPLAY
COMMENTS
4 4 44
ffi 4
lEl
4
SelS
Multiply
Mode
El
1
lEl
18
4 x 4
El
0.25
lEl
84 4 x 4 x 4
El
256
4x4x4x4
REPEATED
OPERATIONS
DIVISION
ADDlTtON
Example:
20+
4 + 4
+4
=32 Example:
2~
2+2+2=0.25
22
(20 20
ill
2
SelS
mvide
Mode
El
20 Sets
Add
Mode
ill
1
2+2
44
ill
0.5
2+ 2+
2
El
24
20+4
El
0.25
2+2+2+2
IEl
28
20+4+4
El
32
20+4+4+4
CONSTANT
OPERATIONS
SUBTRACTiON
MULTIPLICATION
Example:
18-3-3-3=
9example: 4 x 3 =
12,4
x 5 =20
18 18 44
8
18
Sets
Subtract
Mode
lEl
4
SelS
Multiply
Mode
3333
8
15
18-
3
El
12
Sets
Auto·Constant
812
18-
3-3
55
El
9
18-
3-3
- 3
El
20
MEMORY
OPERATION
This
example
is
used
to
illustrate
the
various
memory
features.
You
buy
5
ot
Item Ator 50.25 each end 6of Item 8for 50.75 each.
You
return
for
credit
2of
hem
Cat
SO.15
each.
CHANGE SIGN
Example:
S:J-
3
)=
-5
ENTRY DlSPLAY
ENTRY
DISPLAY
5 5
I8l
5
.25 0.25
El 1.25
I'iB3
1.25
6G
119
6
.75 0.75
El 4.5
I'iB3
4.5
DIVISION
Example: 6+
2=
3,8+
2=4
ENTRY DISPLAV
COMMENT,S
G G
ttl 6Sets
Oivide
Mode
2
~
EI
3Set, Auto·Constant
8 8
§4
CHAIN OPERATIONS
E)Camp'e~
{6
...
4)$2
- 8
""
2.4
6 6
EJ
G
4 4
o
10
6+4
2 2
8
20
{6+412
8 8
ttl
12
(6+
4)
2 - 8
5 5
B2.4 Result
REGISTER EXCHANGE
Example:
2
~5
3:"
3
2 2
B2
3 3
ttl 5
2+3
15
15
g;;j
5Exchanges X
and
YRegi,ters
B 3
5
00
00
3
ffEJ
ttl
15
B
5
5
25
3
-3
-75
15
-5
COMMENTS
Sets Multiply
Mode
5'
5'
x
(-3)
Negative
Indicator
Goes
Out
Negative
Indicator
lights
COMMENTS
Cost of Item A
Memorv Indican" lights
Cost
of Item B
Add,
Cost
of ltom Bto Item A
in
Memory
ENTRV
DlSPLAV
22
02
.15
0,15
§
0.3
liE
0.3
IM8l
5.45
m
5.45
IQ
0
:1;'"
ENTRY CORRECTION
COMMENTS
Credit
for
Item
C
Subtrocls
Item
C
from
A&B
in
Memory
Total
Scale
CI44rs
Memory
OVERFLOW AND
ERROR
INDICATIONS
Whenever
the
capacitY
of
the
machine
is
exceeded
or
an
impossible
calcufation
is
attempted
the
error
indleator
in
the
leftmost
displav
position
will
light.
The
error
conditlnos
relevant
are:
1.
Depressing
G.8 •
0.
B
where
the
ma!fllitude
of
the
re,ult
is
greater
than
99,999,999.
2.
Depressin9
Mil
or
M3
where
the
ma!fllitude
of
the
result
in
memory
is
greater
than
99,999,999.
3.
Division
by
zero.
Example:
5
B
4
19
3
EJ
5+3=85
5
4
o
3
8
Should
Have
Been
3.
RECOVERY TECHNIQUES
Occasio-naHy
during
c1aculations,
an
undesired
arithmetic
function
key
may
be
depressed.
Utilizing
thest!
simple
recovery
techniques
makes
it
unnecessary
to
begin
the
calculations
again.
For
example,
if
the
B
or
B
keys
are
inadvertently
depressed,
simply
enter
a
0,
depress
the
intended
arithmetic
funetian
and
continue
with
the
calculation.
If
the
0.
or
l±l
keys
are
inadvertently
depressed.
simply
enter
a
1,
depress
the
intended
function
key
and
continue
with
the
calculation.
PRODUCT
WARRANTY
LLOYD'S
Electronics
warrants
it.
products
to
be
free
from
defecls
in
matt!riats
and
wOrkmanship
under
n-armal
use
and
service
for
the
following
period:
PARTS
J
YEAR
LABOR
90
DAYS
This
warrllllty
begins
with
the
date
of
purcha
..
and
applies
to
the
original
owner
only.
Within
the
s.pecified
period
LLOYD'S
will
repair
or
replace
any
part(s)
which
we
deem
defective
through
normal
u,",
at
no
charge
extept
for
a
factory
processing
fee
of $1.15.
All
products
must
be
returned
10
the
appropriate
LLOYD'S
Factory
Service
Department
ffJr
Warrantv
Service-.
IMPORTANT:
To
obtain
Warranty
SeNi",
on
any
producl,
you
must
pre
..
nt a
copy
of
Ihe
Bill
of
Sale
as
proof
of
valid
guarantee.
If
the
merchandise
is
tD
be
mailed
to
US~
be
certain
to
include
the
BUI
of
Sale
along
with
your
check
or
money
order
for
the
processing
fee.
Any alterations, abuse. misuse. batte'Y
corrosi«;10
or aecitk!ntal
damage
VQids
tttis guarantee.
Any repairs made
by
other
than a
LLOYD'S
Factory Sent;t:e Cenmt
are
not
coveted
bY
our warranty.
This
guarantee
is
in
lieu
of
all
other
guarantees,
either
expn!ssed
Of
implied
and
is
valid
ontv
in
the
Continental
U.S.,
Alaska,
Hawaii
and
Canada.
Bevond
the
warrantv
period
service
may
be
obtained
at-
the
Factoiy
S~rvjce
Centers
at
reaso-oable
rates~
U.S.
LLOYD'S
Electronics
of
Calif.,
Inc.
P.O.
Box
4248
Compton,
California
90224
CANADA
LLOYO'S
Electronics
Ltd.
11
Plymouth
Street
Winnipeg,
Manitoba
R2X
2V5
LLOYD'S
EI
..
tronlcs
Eastern
Ltd.-
857
Yorkmill.
Road
Don
Mills,
Ontario,
Canada
LLOYD'S
Electronics
Eastern
Ltd.
165
Graveline
Road
Ville
St.
Laurent,
Quebec,
Canada
i:1III~rliil.r
....
,··~~·~~",,"-iiiiio--
__
'_'"
- _
.~
f
;'~22~'.:.c..c..'
.
.c;;,;;c~""",
-'-
......
~
..
i¥i'ti:
•....
_
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