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* POWER SUPPLY
CITIZEN model SDC-3920 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 10 minutes.
-Battery change-
Remove the screw and the battery cover. Install a new battery with the +
symbol facing upward. After changing, use a pointed object to press the
RESET hole near the battery. Replace the battery cover and secure the
screw.
* KEY INDEX
ON
[
] : Power on / Clear entry / Clear key
CE
/
C
[M+] : Memory plus key
[MRC] : Memory recall /clear key
[+/-] : ± Sign change key
RECALL
[
] : Price without tax key / To recall first or second tax rate
−
TAX
TAX
I
when pressing [SET] and [-TAX] keys
TAX
I I
STORE
[
] : Price with tax key / To store first or second tax rate
+
TAX
when pressing [SET] and [+TAX] keys
The Signs Of The Display Mean The Following :
MEMORY : Memory
- : Minus (or negative)
ERROR : Overflow-error
SET : Tax rate setting
TAXI : The 1st tax rate calculation
* OPERATION EXAMPLES
1.Calculation Examples
Before performing each calculation, press the [
Example
2 x 3 = 6
6 + 4 - 7.5 = 2.5
5 x 3 ÷ 0.2 = 75
300 x 27% = 81
11.2
x 100% = 20%
56
300 + (300 x 40%) = 420
300 - (300 x 40%) = 180
4
5
= 625
1 / 2 = 0.5
1
=
. 0
0625
+
(2
x
3
10)
2.Memory Calculation
(25 x 5) - (84 ÷ 3)
+ (68 + 17) = 182
(52 - 35) ÷ (14 - 3 x 2)
= 2.125
135 x (12 + 14) = 3510
(12 + 14) ÷ 5 = 5.2
3.Constant Calculation
2 + 3 = 5
4 + 3 = 7
3 x 4 = 12
3 x 6 = 18
4.Overflow Error Clear
1234567890 x 10000
= 1'234.567890 x 10
5.Price Mark-Up & Down Calculation
2000+(P x 20%)=P
2000
P=
=2'500
- 1
20%
2500-2000 = 500
2000-(P x 20%)=P
2000
P=
=1'666.66
+
1
20%
18000
-
15000
x100%
15000
= 20%
6.TwoTax Rate Functions
● This calculator offers two tax rate settings : TAX I, TAX II.
● TAX I and TAX II are two independent tax rate functions, the calculation
of the first one does not affect the second.
● The operation illustrated below applies both to TAX I and TAX II.
100+TAX(3%)
= 103
Tax amount = 3
* 3 = Tax amount
206-TAX(3%)
= 200
Tax amount = 6
* 6 = Tax amount
[M-] : Memory minus key
[MU] : Price mark-up / down key
[SET] : Tax rate setting key
TAX : Amount of tax
-TAX : Price excluding tax
+TAX : Price including tax
% : Tax rate stored and recalled
TAXII : The 2nd tax rate calculation
Key operation
ON
2 [x] 2 [
CE
/
6 [+] 4 [-] 7.5 [=]
5 [x] 3 [÷] 0.2 [=]
300 [x] 27 [%]
11.2 [÷] 56 [%]
300 [+] 40 [%]
300 [-] 40 [%]
5 [x] [=] [=] [=]
2 [÷] [=]
2 [x] 3 [+] 10 [÷] [=]
[MRC] [MRC] [
25 [x] 5 [M+]
84 [÷] 3 [M-]
68 [+] 17 [M+]
[MRC]
ON
[MRC] [
CE
/
[M-] 52 [-] 35 [÷] [MRC] [=]
[MRC] [MRC] [
[M+]135 [x] [MRC] [=]
[MRC] [÷] 5 [=]
2 [+] 3 [=]
4 [=]
3 [x] 4 [=]
6 [=]
1234567890
10
[x] 10000 [=]
ON
ON
[
] [
CE
/
C
CE
/
C
2000 [÷] 20 [MU]
[MU]
2000 [÷] 20 [+/-] [MU]
18000 [-] 15000 [MU]
3 [SET] [+TAX]
100 [+TAX]
[+TAX]
103 = Tax inclusive value
ON
[
] [SET] [-TAX]
CE
/
C
206 [-TAX]
[-TAX]
200 = Tax exclusive value
ON
] key two times.
CE
/
C
] 3 [=]
C
ON
]
CE
/
C
] 14 [M+] 3 [x] 2
C
ON
]12 [+] 14
CE
/
C
ERROR
]
TAXII
TAXII
TAXII
TAXII
TAXII
TAXII
English
English
English
Display
6.
2.5
75.
81.
20.
420.
180.
625.
0.5
0.0625
125.
MEMORY
28.
MEMORY
85.
MEMORY
182.
MEMORY
2.125
MEMORY
3'510.
MEMORY
5.2
MEMORY
5.
7.
12.
18.
1'234'567'890.
1'234.567890
0.
2'500.
500.
1'666.666666
20.
3.
%
103.
+TAX
3.
TAX
3.
%
200.
TAX
-
6.
TAX
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