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* POWER SUPPLY
CITIZEN model SDC-640II is a dual-powered (high power solar +
back-up battery) calculator operative under any lighting conditions.
-Auto power-off function-
The calculator switches the power off automatically if there has
been no key entry for about 6 minutes.
-Battery change-
If the back-up battery needs to be changed, open the lower cabinet
to remove the old battery and insert a new battery in the indicated
polarity. After changing battery, please use a metal, elliptical object
to press the RESET pad on printed circuit board.
* KEY INDEX
ON
[
] : Power on / Clear key.
C
[00 0] : Shift-back key.
[M–] : Memory minus key.
[MR] : Memory recall key
[MU] : Price Mark-up/down key
[MII+] [MII–] [MII
– F –
– 0 – 2 – 3 –
– A –
5/4
The Signs Of The Display Mean The Following:
MEMORY:The first memory loaded.
MEMORYII:The second memory loaded.
* OPERATION EXAMPLES
1.Calculation Examples
Before performing each calculation, press the [
Example
1 x 2 x 3 = 6
5/4
2 x 3 = 6
2 + 4 + 6 = 12
1234 x 100
= 123,400
5 x 3 ÷ 0.2 = 75
300 x 27% = 81
11.2
56
30 + (30 x 40%) = 42
30 – (30 x 40%) = 18
4
5
= 625
$14.90 + $0.35 – $1.45
+ $12.05 = $25.85
5/4
1 / 30 = 0.0333....
(2
x
2.Memory Calculation
(12 x 4) –
5/4
(20÷ 2) = 38
15 x 2 = 30
20 x 3 = 60
25 x 4 = 100
(total A = 190)
10 ÷ 5 = 2
4 x 2 = 8
(total B = 10)
A ÷ B = 19
3.Constant Calculation
5/4
2 + 3 = 5
4 + 3 = 7
3 x 4.111 = 12.333
3 x 6 = 18
4.Overflow Error Clear
12345678901234
x 100
= 1234567890123400
5.PRICE MARK-UP & DOWN CALCULATION
5/4
200+(P x 20%)=P
P=
- 1
250–200 = 50
125–(P x 20%)=P
P=
1
125–100 = 25
6.DELTA PERCENT
180
5/4
150
= 20%
File name: D494_IB_English_081919.doc
Size : 250x72mm(成型 : 125x72mm)
[CE] : Clear entry.
[M+] : Memory plus key.
[+ / –] : ±Sign change key
[MC] : Memory clear key.
R
] : The Second Memory Key
C
Decimal place selection switch
Floating decimal mode
Fixed decimal mode
ADD–mode automatically enters the monetary
decimal in addition and subtraction calculations
Round-up / Round-off / Round-down switch
Key operation
ON
[
1 [x] 2 [x] 3 [=]
ON
[
2 [x] 2 [CE] 3 [=]
2 [+] 3 [+] 6 [
2 [+] 4 [+] 6 [=]
12345 [00 0]
[x] 100 [=]
5 [x] 3 [÷] 0.2 [=]
300 [x] 27 [%]
x 100% = 20%
11.2 [÷] 56 [%]
30 [+] 40 [%]
30 [–] 40 [%]
5 [x] [=] [=] [=]
1490 [+] 35 [–] 145 [+]
1205 [=]
30 [÷] [=]
1
= 0.166....
2 [x] 5 [–] 4 [÷] [=]
5
-
4)
ON
[
]
C
12 [x] 4 [M+] 20 [÷] 2 [M–]
[MR]
[MC] [CE]
15 [x] 2 [M+] 20 [x] 3 [M+]
25 [x] 4 [M+]
[MR]
10 [÷] 5 [MII+] 4 [x] 2 [MII+]
R
[MII
]
C
[MR] [÷]
R
[MII
]
C
[=]
R
[MII
] [MII
C
2 [+] 3 [=]
4 [=]
3 [x] 4.111 [=]
6 [=]
123456789012345
[00 0] [x] 100 [=]
ON
[
]
C
200 [÷] 20 [MU]
200
[MU]
= 250
20%
125 [÷] 25 [+/–] [MU]
125
[MU]
= 100
+
25%
-
150
180 [–] 150 [MU]
x100%
English
English
–MINUS:Minus ( or negative)
ERROR:Overflow-error.
English
ON
] key.
C
]
C
]
C
ON
]
C
MEMORY
MEMORY
MEMORY
MEMORY
MEMORY
MEMORY MEMORY II
MEMORY MEMORY II
MEMORY MEMORY II
MEMORY MEMORY II
MEMORY MEMORY II
ON
R
] [MC] [
]
C
C
ERROR
12'345'678'901'234
ERROR
12.345678901234
Date : 2008/9/19
Display
0.
6.
0.
6.
0.
12.
1'234
123'400
75.
81.
20.
42.
18.
625.
25.85
0.03
0.16
0.
10.
38.
0.
60.
100.
190.
8.
10.
190.
10.
19.
0.
5.00
7.00
12.34
18.00
0.
250.
50.
100.
25.
20.
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