Sharp COMPET-23 User manual

~SHARP
ELECTRONIC
DESK
CALCULATOR
WITH
[Q
COMPET-23
M OD EL CS-2 3C
. INS TR UC TION M ANUA L
' J

CONTE NT S
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2
Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4
Key designation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5
Hints. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6
1. Addition and subtraction ......................... . .............. . , 6
2.
Multiplication and successive multiplication. . . . . . . . . . . . . . . . . . . . . . . . . . .. 8
3. Division and su cc essi ve division ............... . ..................... 10
4.
Multiplication and division check ................... . ................ 11
5. Rounding off (Multiplication and Division) ........... .. ............... 12
6. Negative
multiplication and division ............ . ..................... 13
7. Sum (difference) of products and individual products. ... .. ............... 15
8. Sum (difference)
of quotients and individual quotients ................... 16
9. Product
(Quotient) of Sums (Differences) and individual Sums (Differen c es) .. 18
10.
Multiplication and division by constant ............................... 20
11. Constant addition,subtraction
....................................... 21
12. Exponent calculation ................ .. ........................... 23
13. Geometric progression
........ ..... . .. ...... •• .................... 24
14. Square
root extraction ..•..... •. ... , . •• ........................... 25
15 Cubic
root extraction ....................... .. .................... 26
16. Mixed calcu lation .................... . ........................... 27
17.
Ratiocai c ulation ...... '" ....................................... 27
18. Percentage
cal c ulation ... . .......................... . ............. 29
19. Correcting mistakes
.............................................. 30
Square root
table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Cubic root table . ........................... .... ......................... 32

INT RODUC TIO N
Sharp's amazing CS-23C electr.onic desk calculator using ICs (Integrated Circuits) marks
another
major advance in modern business methods. Years of pioneering research and
resourcefulness in electronic engineering
has enabled Sharp to develop an exceptionally
remarkable desk calculator with a memory register.
The CS-23C
is thoroughly reliable and carries out complicated calculations with amazing
speed and efficiency. This booklet has been prepared to give current users and prospective
buyers a detailed understanding
of the scope and breadth of the machine's operation.
2

FEATURES
* Superior MOS -ICs
72 MOS-ICs (Metal Oxide Semiconductor Integrated (Circuits), 76 transistors and 335
diade-s d~astic:a\\y ~ed\.\ce tile Il\.\ m 'ae~ a' \NmKillg pmts , im:xeClse oepellooDi\it'l .
* Memory register
Stores intermediate answers for continued calculation ... enables extremely com-
plicated and diverse calculations, such
as sum of products, calculations by constant,
etc.
* Compact
Thanks to 72 ICs, the CS-23C is amazingly compact and light.
* Round off device
Setting the Round off dial conveniently counts fractions over 1/2 as one, rounds off
others.
* Overflow error ch eck lamp
A red error lamp turns on by mis-operation or exceeded capacity in any calculation.
* Memory indicator
When the memory entry is registered, the red Memory lamp turns on.
* Double-set pro te ction keys
Eliminate error, speed up operation . .. no more worry about doublesetting keys.
* Clear display panel
Snap reading with advanced electronic numerical indicators. The newly designed display
panel prevents annoying glares caused by
light reflecting off the display panel.
* Simplified exponent calculation
* Option al "Memorizer"
Sharp's dial unit "Memorizer 1 0" (CSA10) or automatic programer "Memorizer 60"
(CSA-12) can be easily connected for simplified diverse calculation by constant.
* Sophisticated spa ce-age styl ing
Lightweight and noiseles s, easy-to-carry the CS-23C enhanc es mode rn office decors,
upgrades
working areas, increasesefficiency.
3

SPECIFICATIONS
Power source:
Capacity:
Decima l poin t:
Sign ind icat ion :
Calc ulat ion s:
Calculation sp eed :
I
Cs:
Memory registe r:
Tr ansisto rs:
Dio des :
Di
ode array s:
Clock fre qu en cy:
Temperature:
P
ower co nsump tion:
Dimens ions :
W
eig ht:
AC 100/110/120 or 200/220/240V, 50'" 60 Hz
14 digits, 6
digit decimals
Addition & Subtraction: 14 digits ± 14 digits = 14 digits
Mu
Itiplication :
Total digits of multiplier and multiplicand : up to 14 digits
(rounding off possible)
Division: 13
digits-:-13 digits = 14 digits-divisor digits
In
case of addition and subtraction, decimal point is always
aligned
to the tabulation, In case of multiplication and division,
decimal
point works based on floating system until it exceeds
the
tabulation dial number. However, it is treated according
to the tabulation if the result exceeds the tabulation .
Minus
indication lamp in the case of Negative
Four arithmetical operations, product ± product with individual
products,
quotient ± quotient with individual quotients,
successive
multiplication and division, multiplicand ± multi-
plicand with individual product s,dividend ± dividend with indivi-
dual quotient, multiplication and division by constant, exponent
calculation, mixed calculation, etc,
Addition & subtraction O,05sec
Multiplication
O,5sec
Division
O,5sec
72
1
76
335
34
50kHz
O°C - 40°C (32°F - 104°F)
25W
294mm wide, 133mm high, 317mm deep (11-5/8" x 5-1/4" x 12-1/2")
4kg (8.8 Ibs.)
4

0.KEY D
ES IGNATION
Tabulation & Round off dial (0 ~ 6)
Specifies decimal places. Set red figure
for rounding off. Set black figure for discarding.
o Constant key
Used for carrying out calculations by constant. Push to lock the key. Push again to
unlock the key.
@ Clear entry key
Clears figures mistakenly set.
[5] Clear key
Clears all the contents except
memory register.
0-0 Numeral keys
8 Decimal point key
EJ Recall key
Exchanges the contents
of l \Jo.1 register with those of No.2 register.
@ Multiplication key
Orders
multiplication. The key lamp turns on when the key is touched.
@ Equal key
Derives sum, product, and
quotient .
I±l Division key
Orders division. The key lamp turns on when the key
is touched.
= Red equal key
Orders subtraction. Starts calculation
after changing the sign of the operator.
§) Memory recall key
Summons the stored contents
in the memory on the display panel.
8 Memory plus key
Adds displayed figures
to the stored contents in the memory. (No change in the display
panel.) Derives sum
of products (quotients) in memory calculation. Each product
(quotient)is displayed and added to the stored contents in the memory.
E3 Memory minus key
Subtracts displayed figures
from the contents in the memory. (~Jo change in the display
panel.) Derives difference
of products (quotients) in memory calculation. Each product
(quotient) is displayed and subtracted from the stored contents in the memory.
§] Clear memory key
Clears the contents in the
memory only.
o Overflow error lamp
o Memory lamp
• Minus sign lamp
5

HINTS
1. As highly sensitive ICs, transistors and diodes are used, avoid placing the unit in hot,
dusty or humid locations.
2.
Be sure to turn off the unit before disconnecting the power cord.
3. Do
not jolt or drop the unit.
4. Do not stand it on its side or turn it over.
5. Do
not place articles on top of the unit.
6. When cleaning the cabinet, use the enclosed cloth. Do not use a wet cloth or any
organic solutions such
as kerosene or benzine.
7. When
not in use, keep the unit covered.
OPERATI ON
Connect power cord to an electric outlet, and turn the unit on.
When the
unit is turned on, clear the calculator in the following order.
1. Touch CD key. (0 lamp goes out.)
2. Touch
§J key. (Glamp goes out.)
3. Except
for constant and exponent calculation, 0 key can be in locked or unlocked
cC?ndition. However, in order
to avoid confusion, examples of unlocked condition are
given in this operation manual.
1. Ad dition and Subtraction
.. Sum, Difference: Up to 14 (6 digit decimals)
EX.1 - 1 123 +456 +789 = 1368
Steps:
Operation Display
Note
1 0 e Tabulation dial
2
CD
0
3
4 I
I
123
§J
12 3
123
5 456 456
6 @ 579
7 789 789
8 I @ 1368 Sum
6

Ex.1-2 3.4567 + 2.1 -1.234 =4.32
Steps:
I Operation Display
Note
1 I
GJ . Tabulation dial
2
CD
0
3 3.4567 3.4567
4 § 3.45
5
2.1 2.1
6 @ 5.55
7 1.234 1.234
8
Red § 4.32 1 Ans.
Ex. 1-3 0.12+0.3584+0.235=0.7134
Steps:
Operation Display
Note
1 Tabulation dial
8 .
2 0
CD
3 .12
0.12 I
4 § 0.1200 I
5 .3584 0.3584
6 @ 0.4784
7 .235 0.235
8 I
I § I 0.7134 I Ans.
Ex.1-4 35.62 -0.53 -40.15 = -5.06
Steps:
Operation
1 0 .
2 I
CD
3 35 .62
4 I §
Display
Note
0
35.62
35.62
Tabulation dial
5 0.53
.53 35.09
I Red
§]
6 40.15
40.15
7 I Minus lamp on
5.06-
8 I
Red §
7

Ex. 1-5 462-146-29+212=499
Steps:
Operation Display
Note
1
0-
Tabulation dial
2 [0 0
3 462 462
4 @ 462
5 146 146
6
Red §]
316
7
29
29
8
9
Red §]
212 I 287
212
10
@)
I 499 Ans.
Note
1)
Use §] key for addition. Use red §] key for subtraction.
2)
In the case of negative results, minus (-) lamp turns on.
2. Multiplication a nd Su ccessive multipl ic ation
* Tot al digits of multiplicand and multiplier: Up to 14 digits (6 digit decimals)
" Product: Up
to 14 digits (6 digit decimals)
* Rounding off possible
Note:
Set the larger Tabulation dial number (black) than the required decimal digits.
Ex. 2-1
11 x2.2=2.42
Steps:
Operation Display Note
1 I Tabulation dial
I 0 -
[0 I o
2 1
.1
1 .1
3
4
1.1
® lamp on
®
2.2
5 2.2
6 §) 2.42 ® lamp
of f,
product
I
8

Ex. 2-2 2.2 x 3.3 x 4.4 x 5.5 = 175.692
Steps:
Operation Display
Note
1
8e
Tabulation dial
2 0 0
3 2.2 2.2
4 @ 2.2 @ lamp
on
5
3.3 3.3
6
§)
7.26
~
lamp off
7
~
7.26 @ lamp on
8 4.4 4.4
9
§J
31.944 @ lamp off
10
@ 31.944 @ lamp on
11
5.5 5.5
12
§ 175.6920 I @ lamp
off (product)
r\jote:
1) When the decimal digits of the product are smaller than the specified
Tabulation dial number, the decimal
point is automatically positioned.
When the decimal digits
of the product are larger than the specified
Tabulation dial
number, the dial prescribes the decimal digits.
2) When @ key
is touched, the key lamp turns on indicating that multi-
plication order is registered.
3)
For further continued Successive Multiplication, touch the @ key
repeatedly and proceed the
ca lculations.
9

3. Division and Successive division
* Dividend: Up to 13 digits (6 digit decimals)
* Divisor: Up to 13 digits (6 digit decimals)
* Quotient: 14 digits -divisor digits
(6 digit decimals)
Rounding
off possible
*
Note: Set the Tabulation dial number (black) larger than the required decimal digits.
Ex.3-1 436.524 -:- 2=218.262
Steps:
Operation Display
Note
1
8-
Tabulation dial
2 8] 0
3 436.524 436.524
4 [f) 436.524 [f) lamp on
5 2 2
6 @ 218.2620 (!) lamp
off (quotient)
Ex.3-2 256 -:- 12 -:- 0.56 = 38.095237
Steps:
Operation Display
Note
1
0-
Tabulation dial
2 0 0
3 256 256
4
(fJ
256
{tl lamp on
5 12 12
6 § 21 .333333 !tl lamp off
7 (f) 21.333333
I±l lamp on
8 56 0.56
9
§J
38.095237
(fl lamp off (quotient)
Note: 1) When [f) key is touched, the key lamp
turns on indicating that the division
order
is registered.
2) For further continued Successive Division, touch ltlkey repeatedly to
proceed the calculations.
10

4. Multiplication and Division check
* Capacity: Same as for Multiplication and Division.
After Multiplication (Division) is carried out, get the multiplier (dividend) to check
the product (quotient).
Multiplication check
Ex.4-12x3*=6
2: mUltiplicand
3: multiplier
6: product
(to be checked)
Steps :
Operation Display Note
1
0e
Tabulation dial
2 (0 0
3 2 2
4
~
2
~ lamp on
5 3 3
6
@l 6
~ lamp off
7 (f) 6 (f) lamp on
8
El
2
9
§J
3 * (f) lamp off
Note: When the number 3 at step 9 is equal to a multiplier 3* in above expression,
the calculation
is correct.
When the number 4
is read in by mistake instead of 3 at step 5, the number
4
is displayed at step 9. As the number 4 should be a multiplier 3*, we can
find that product 8 is not correct.
Ex .4-2 12* -;- 2 = 6
12 : dividend
2: divisor
6: quotient
Steps :
Operation Display Note
1 0 e Tabulation dial
2 0 0
3 12 12
4
If)
12 (f) lamp on
5 2 2
11

6 6 [f) lamp off
7 6 @ lamp
on
8 2
9 12 @ lamp off
Note: When 12 at step 9 is equal to a dividend 12* in above expression, the
calculation
is correct.
When a number 10 is entered by mistake instead of 12 at step 3, the number
10
is displayed at step 9. As the number 10 should be a dividend 12*, we can
find that quotient 5 is not correct.
5. Rou nding off (Multiplication and D ivision )
* Capacity: Same as for Multiplication and Division
Ex.
5-1 0.14285 x 7 = 0.99995 Rounding off to the 5th decimal place (Multiplication)
Steps:
Operation Display Note
1
Red @.
Round off dial
2
3
CD
.142 85
0
0.14285
4 @ 0.14285 @ lamp on
5
6 I
I
7
@ 7
1.0000 @ lamp
off (rounded off)
Ex. 5-2 5 -:- 9 = 0.55555 .... Rounding off to the 5th decimal place (Division)
Steps:
! Operation Display Note
1
Red (!).
Round off dial
2
CD
0
3 I 5 5
12

4 5
[fJ lamp on
5 9
6 0.5556
(fJ lamp o ff (rounded off)
Note- When rounding off, be sure to set red number of the Tabulation dial
6. Negative multipl ic ati on an d division
'I(- Capacity: Same as for multiplication and division
Ex.
6-1 23 x 45 x (- 67) = - 69345
Steps:
Operation Display
Note
1 Tabulation dial
m.
8]
2 0
3 23 23
4 23
~ lamp on
~
5
45
45
§)
1035
6 ~ lamp off
7 1035
~ lamp on
~
67
8 67
~ lamp off (product), minus lamp on
9 Red
=
69345-
E x.6-2 -78 x (- 9.6) = 748.80
Steps:
Operation Display
Note
1
2
3
4
5
6
7
0 .
8]
78
Red =
@
9.6
Red
:I
0
78
78.00 -
78.00 -
9.6
748.80
Tabulation dial
minus
la mp on
@Iampon
~
lamp off (product), minus lamp off
13

EX.6-3 56.55 -;- (- 7.3) = - 7.746575
Steps:
Operation Display Note
1 0 e
Tabulation dial
2 0 0
3 56.55 56.
55
4 It) 56.55 III lamp on
5 7.3 7.3
6 Red = 7.746575- It} lamp
off (quotient), minus lamp on
EX.6-4 -87.2 -;- (- 6.33) = 13.775671
Steps:
Operation Display
Note
1 0 e Tabulation dial
2 0 0
3 87.2 87.2
4 Red = 87.200000 -Minus lamp on
5 [f)
87.200000- [f) lamp on
6 6.33 6.33
7
Red = I
13 .775671
(fJ lamp off (quotient)
14

7. Sum (Dif fere nce) of produc ts and Individual products
it Capacity: Same as for multiplication
Ex.7 -1 (123 x 0.55) + (43 x 0.76) = 100.33
Steps:
1
2
3
4
5
6
7
8
9
10
11
12
Operation
CD
§J
0e
123
®
I .55
8
43
~
.76
8
§J
Display
0
0
0
123
123
0.55
67.65
43
43
0.76
32.68
100.33
Nqte
}
Clears No.1 reg is ter & memory
Tabulation dial
@ lamp on
® lamp
off, (product), 0 lamp on
® lamp on
® lamp off (product)
Sum
of produc ts
Ex.7-2 (12.3 x 9.8) -(2.3 x 4.32) = 110.6040
Steps:
Operation Note
Display
1
CD
I 0 }Clears No. 1 register & memory
§J 0
2
3 Tabulation dial
0
0 e
4 12.3 12.3
5 @ lamp on
12.3
~
6 9.8 9
.8
7 120.5400 ® lamp
off, (product) , o lamp
on
8
8 2.3 2.3
9 2.3 @ lamp on
®
10 4.32 4.32
11
9.9360
~ lamp off (product)
8
12 §} 110.6040 Difference
of products
15

Ex.7-3 (46.9 x 3.51) + (83.4 x 7.2) -(65.3 x 4.73) =456.2300
Steps:
Operation Display
Note
1
2
CD
§1
0
0 }Clears
No . 1 register & memory
3
Ge
0 Tabulation dial
4 46.9 46.9
5
~
46 .9
~ lamp on
6 3.
51
3.51
7
El
164.6190
@ lamp off / (product).
o lamp on
8 83.4 83.4
9
~
83.4 @ lamp on
10 7.2 7.2
11
El
600.4800
~ lamp off (product)
12
65.3 65.3
13
~
65.3 @ lamp on
14 4.73
4.73
15 8
308.8690 @ lamp off (product)
16
§J
456.2300
Ans.
Note:
1) Touch CD and §1 keys in order to clear all the contents in the calculator.
2) Touch 8
for Sum of products. Touch 8 for Difference of products .
3)
For further continued Sum (Difference) of products, repeat the operation .
8. Sum (Diff er en ce) of Qu otie nts a nd Individ ual Quotien ts
* Capacity: Same as for Division.
Ex.8-1 (1288723) + (0 . 8674) =56.2150
Steps:
Operation Display
Note
1
2
3
4
5
6
CD
~
0e
1288
(i1
23
0
0
0
1288
1288
23
} Clears No . 1 register & memory
Tabulation dial
(i1 lamp on
16

7
8
9
10
11
12
E3
56.0000
(E lamp off (quotient), o lamp on
.86 0.86
(E
0.86
(tJ lamp on
4 4
8 0.2150
ffi lamp off (quotient)
§) 56:2150 Sum
of quotients
Ex.8-2 (11.502..;- 2.7) -(0.96..;- 5) = 4.0680
Steps:
Operation Display Note
1
2
3
4
5
6
7
8
9
10
11
12
CD
§J
8 -
11 .502
(tJ
2.7
E3
.
96
[f)
5
8
§J
0
0
0
11.502
11.502
2.7
4.2600
096
0.96
5
0.1920
4.0680
}Clears
No.1 register & memory
Tabulation dial
Iil lamp on
(tJ lamp off (quotient).
o lamp on
If) lamp on
If) lamp off (quotient)
Difference
of quotients
Ex.8-3 (568";- 4) + (0.586..;- 2) -(35.8";- 9.308) = 138.4468
Steps:
1
2
3
4
5
6
7
8
Operation Display
Note
CD
§J
0·
568
(f)
4
8
.58.6
0
0
0
568
568
4
142.0000
0.586
}Clears
No.1 register & memory
Tabulation dial
lE
lamp on
ttl
lamp off (quotient). o lamp
on
17

9
10
11
12
13
14
15
16
ltJ
2
El
35.8
r.tJ
9.308
g
8
0.586
2
0.2930
35.8
35.8
9.308
3.8461
138.4468
(f) lamp on
!tl lamp off (quotient)
[f] lamp on
[fJ lamp off, (quotient)
Sum of quotients
Note : Sum (Diff erence) of Quotient and Product can be obtained in the same way
as stated above.
9. Product (Q uotient) of Sums (Differences) and individual Sums (Differences)
* Capacity: Same as for Multiplication or Division.
Ex.g-l (2+3)x(4+5)=45
Steps
Operation I Display
Note
1
CD
0
2 0
~
i Tilbulation dial
i
3 0 e 0
4 2 2
5 8 2 8 lamp on
6 3 3
7 8 3
8
CD
0
9 4 4
10
§l
4
11
5 5
12
§l
9
13
9 ~ lamp on
~
14
§l
5
15
§J @ lamp
off
I
produ ct of sums
45
18

Ex.9-2 (3 - 7) x (2 -8) = 24
Steps
Operation Display
Note
1 0 0
2
@3
0
3 0 e 0 Tabulation dial
4 3 3
5 8 3 8 lamp on
6 7 7
7
E3
7
8
(0
0
9 2 2
10
§)
2
11
8 8
12
Red
6-
13
@
6-
®lamp on
14
§)
4-
15 §)
24 ®lamp
off
Ex.9-3 (6 -26) -:- (2 + 3) = -4
Steps
Operation I Display Note
(0
1 0
@3
0
2 Tabulation dial
0
3 0 e
4 2
2 8 lamp on
2
5 8
3 3
6 3
7 8
(0
0
8
9 6 6
6
10
26
11 26
Red 20- I
12
19