User manual CITIZEN SR-281
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Manual abstract: user guide CITIZEN SR-281
Detailed instructions for use are in the User's Guide.
[. . . ] SR-281 / SR-282 Scientific Calculator
General Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Turning on or off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Battery replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Auto power-off function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] [ ( 3 x 5 ) + ( 56
0[X M]
7 ) + ( 74 8 x 7 ) ] = 41
DEG
0. 3 [ x ] 5 [ M+ ] 56 [ [ ] 8 [ x ] 7 [ M+ ] ] 7 [ M+ ] 74 748
DEG
7 M+ 18.
DEG
M
[ MR ] M
M
0[X M]
DEG
41.
0.
(Note) : Besides pressing [ STO ] or [ X M ] key to store a value, you can also assign values to memory variable M by [ M+ ]. However, when [ STO ] [ M ] or [ X M ] is used, previous memory contents stored in variable M are cleared and replaced it with the newly assigned value. When [ M+ ] is used, values is added to present sum in memory.
Order of operations
Each calculation is performed in the following order of precedence:
-E6-
1) 2) 3) 4)
Fractions Expression inside parentheses. Coordinates transformation ( P R , R P ) Type A functions which are required entering values before 2 pressing the function key, for example, x , 1/x, , x!, %, RND, ENG, , , x ', y ' . x,
y
X
5) 6)
Type B functions which are required pressing the function key 1 1 1 before entering, for example, sin, cos, tan, sin , cos , tan , 1 1 1 sinh, cosh, tanh, sinh , cosh , tanh , log, ln, FRAC, INT, , X X 3 , 10 , e , NOT, EXP, DATA in STAT mode. You attempted to divide by 0 When allowable input range of function calculations exceeds the range specified 3) When result of function calculations exceeds the range specified 4) When the [ ( ] key is used more than 13 levels in a single expression 5) When USL < LSL value To release the above errors, please press [ ON/C ]. 1) 2)
Basic Calculations
Use MAIN ( [ MODE ] 1 ( MAIN ) ) mode for basic calculations.
-E9-
Arithmetic calculation
Arithmetic operations are performed by pressing the keys in the same sequence as in the expression. 7 + 5 x 4 = 27
7[+]5[x]4[ ] 7+5
DEG
4= 27.
For negative values, press [ +/ ] after entering the value; You can enter a number in mantissa and exponent form by [ EXP ] key. 2. 75 x 10
5
= 0. 0000275
]
DEG
2. 75 [ EXP ] 5 [ +/ ] [
2 . 75E05= 0. 0 0 0 0 2 7 5
Results greater than 10 exponential form.
12
or less than 10
11
are displayed in
12369 x 7532 x 74103 = 6903680612720 12 = 6. 90368061272 x 10
12369 [ x ] 7532 [ x ] 74103 [ ]
DEG
12369
7532
7
12
6. 9 0 3 6 8 0 6 1 2 7 2
Parentheses calculations
Operations inside parentheses are always executed first. SR-281 / SR-282 can use up to 13 levels of consecutive parentheses in a single calculation. Closed parentheses occurring immediately before operation of the [ ) ] key may be omitted, no matter how many are required. 2 x { 7 + 6 x ( 5 + 4 ) } = 122
2[(]7[+]6[(]5[+]4[ ] 2
DEG
( 7+6
( 5+4= 122.
(Note) : A multiplication sign " x " occurring immediately before an open parenthesis can be omitted. The correct result cannot be derived by entering [ ( ] 2 [ + ] 3 [ ) ] [ EXP ] 2. Be sure to enter [ x ] between the [ ) ] and [ EXP ] in the below example.
-E10-
( 2 + 3 ) x 10 = 500
[ ( ] 2 [ + ] 3 [ ) ] [ x ] [ EXP ] 2 [ ]
DEG
2
(2+3)
1E02= 50 0.
Percentage calculation
[ 2nd ] [ % ] divides the number in the display by 100. You can use this key sequence to calculate percentages, add-ons, discounts, and percentage ratios. 120 x 30 % = 36
120 [ x ] 30 [ 2nd ] [ % ] [ ] 120
DEG
3 0%= 36.
88
88 [
55 % = 160
] 55 [ 2nd ] [ % ] [ ] 88
DEG
5 5%= 160.
Display notations
The calculator has the following display notations for the display value.
Fixed-point / Floating Notations
To specify the number of decimal places, press [ 2nd ] [ TAB ] and then a value indicating the number of places ( 0~9 ). To return floating setting, press [ 2nd ] [ TAB ] [ · ].
Scientific Notation
To change the display mode between floating and scientific notation, press [ FE ].
Engineering Notation
Pressing [ ENG ] or [ 2nd ] [ ] will cause the exponent display for the number being displayed to change in multiples of 3. 6
6[
7 = 0. 85714285714. . .
]7[ ] 6 7=
DEG
0. 8 5 7 1 4 2 8 5 7 1 4 [ 2nd ] [ TAB ] 4 6 7= 0. 8 5 7 1
DEG TAB
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[ 2nd ] [ TAB ] 2 6 7=
DEG
TAB
0. 8 6 [ 2nd ] [ TAB ] [ · ] 6 7=
DEG
0. 8 5 7 1 4 2 8 5 7 1 4 [ FE ] 6 7=
DEG
8. 5 7 1 4 2 8 5 7 1 4 3 [ ENG ]
DEG
03
857. 1 4 2 8 5 7 1 4 3 [ 2nd ] [ ] [ 2nd ] [ ]
DEG
03
0. 0 0 0 8 5 7 1 4 2 8 5
Engineering Symbol Notation
Each time you specify the ENG mode, a displayed result is automatically shown with the corresponding engineering symbol.
yotta
24 21 18 15 12 Y = 10 , Z = 10 , E = 10 , P = 10 , T = 10 , G = 10 6 3 3 6 M = 10 , K = 10 , m = 10 , µ = 10 , 9
zetta
exa
peta
tera
giga
9 mega
,
kilo
milli
micro
nano
n = 10 , p = 10
21 z = 10 ,
pico
12
,
femto
f = 10
15
,
atto
18 a = 10 ,
zepto
yocto
24 y = 10
Perform the following operation to specify engineering symbol notation. [ MODE ] 5 ( ENG ) To exit from this mode, press [ MODE ] 5 once again. [. . . ] The complement is the result of subtracting that number from 10000000000 in that number's base by pressing [ NEG ] key in non-decimal bases. 3/A 16 = NEG IFIFIFIFIFIFIC6 16
[ 2nd ] [ HEX ] 3 A [ NEG ] NEG
DEG HEX
h 3 /A F F FFFFC6
h
Logical operation
Logical operations are performed through logical products (AND), negative logical (NAND), logical sums (OR), exclusive logical sums (XOR), negation (NOT), and negation of exclusive logical sums (XNOR). 1010 2 AND ( /A 16 OR 7 16 ) = 12 8
[ 2nd ] [ BIN ] 1010 [ AND ] [ ( ] [ 2nd ] [ HEX ] A [ OR ] 7 [ ) ] [ ] [ 2nd ] [ OCT ]
DEG BIN
b 1 0 1 0 AND ( h 00000000012
o
Statistical Calculations
Use STAT ( [ MODE ] 2 ( STAT ) ) mode for statistical calculations.
The calculators can perform both singlevariable calculations and pairedvariable in this mode.
statistical
Press [ MODE ] 2 ( STAT ) to enter STAT mode. There are six items in STAT mode, asking you to select one of them,
DEG STAT
1VAR LIN LOG
[
][
][
]
DEG
STAT
EXP PWR DCL
Singlevariable statistics
1VAR Singlevariable statistics
Paired-variable / Regression statistics
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LIN LOG EXP POW DCL
Linear Regression Logarithmic Regression Exponential Regression Power Regression Clear all statistical data
y=a+bx y = a + b lnx bx y=a·e b y=a·x
Entering data
Always make sure you clear statistical data by DCL before performing statistical calculations. [. . . ]
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