Citizen SR-260 User manual

E-1
Contents
General guide .................................................. E - 2
Power supply ......................................................................... E - 2
The keyboard ......................................................................... E - 2
Display symbols .................................................................... E - 3
Display formats ..................................................................... E - 3
Order of operations................................................................ E - 4
Correction .............................................................................. E - 5
Accuracy and Capacity.......................................................... E - 5
Overflow / Error conditions.................................................... E - 7
Basic calculation ............................................. E - 8
Mixed arithmetic calculation ................................................. E - 8
Parentheses calculations ...................................................... E - 8
Constant calculation .............................................................. E - 8
Percentage calculation .......................................................... E - 9
Memory calculation ............................................................... E - 9
Scientific calculation ..................................... E - 10
Reciprocal, Factorial ........................................................... E - 10
Square, Square / Cubic Root, Power, Root ........................ E - 10
Logarithms and Antilogarithms ........................................... E - 10
Fraction calculation ............................................................. E - 10
Angular units conversion..................................................... E - 11
Trigonometric / Inverse trigonometric functions ................. E - 11
Hyperbolic / Inverse hyperbolic functions ........................... E - 12
Rectangular / Polar coordinates.......................................... E - 12
Permutations, Combinations .............................................. E - 12
Sexagesimal ↔Decimal form conversion ......................... E - 13
Base-n mode calculation .................................................... E - 13
Complex numbers calculation ............................................ E - 14
Random numbers and Exchange key................................. E - 14
Unit conversion.................................................................... E - 15
Statistics calculation ..................................... E - 15
Computing single variable statistics ................................... E - 15
Viewing statistics data ........................................................ E - 16
Adding a data entry ............................................................. E - 17
Editing statistics data .......................................................... E - 17
Delete error .......................................................................... E - 18
Weighted data entry method ............................................... E - 18

E-2
General guide
Power supply
On or Off :
Toturnthecalculatoron,press[ON/C];toturnthecalculatoroff,press
[2ndF][OFF].
Auto power-off function :
This calculator automatically turns off it when not operated for
approximately9minutes.Powercanberestored by pressing the [ON/C]
keyagain. Memorycontentsandthepreviousmode setting(STAT,DEG,
CPLX, Base-n,…) are retained even when power is turned off or auto
power-off.
Battery replacement :
The calculator uses two alkaline button batteries GP76A(LR44) for
power.Ifthedisplaybecomesdimanddifficulttoread,thebatteriesshould
bereplaced as soon aspossible.
Toreplace batteries:
1) Removethescrews that hold thebackcover.
2) Removethebackcover.
3) Replacetheoldbatteriesandinstallnewoneswithpolarityincorrect
directions.
4) Securethescrewsinplace,thenpress[ON/C]toturnthepoweron.
The keyboard
Manyofthecalculator’skeysareusedtoperformmorethanonefunction.
Thefunctionsmarkedonthekeyboardareprinteddifferentlytohelpyoufind
theoneyouneedquicklyandeasily.
1st functions
Thosearethefunctionsthatarenormallyexecutedwhenyoupressthekey.
2nd functions
Thesecondfunctionisprintedaboveortotherightofthekey.Toexecute
2ndfunctionskey,pleasepress[2ndF]thenthecorrespondingkey.When
youpress[2ndF ], the “2ndF”indicatorshowninthe display is totellyou
thatyouwillbeselectingthesecondfunctionofthenextkeyyoupress.Ifyou
press[2ndF]bymistake,simplypress[2ndF]againtoremovethe“2ndF
” indicator.
sin
sin –1
1st functions
2nd functions

E-3
(Note) : [ A ], [ B ], [ C ], [ D ], [ E ], [ F ] are 1st functions in HEX mode.
Display symbols
Indicatorsshownonthedisplayisto indicate you the current status
ofthecalculator.
DEG or RAD or GRAD : angular unit
M : Independentmemory CPLX :Complexnumbermode
E: Overflow / Error STAT: Statisticalmode
–: minus 2ndF: [2ndF]keypressed
( ) : Parenthesiscalculation CP : Precisioncapability
BIN: Binarymode CPK: Processcapability
OCT : Octalmode : Deviation
HEX : Hexadecimalmode USL: Setting upper limit
ED : Editmode LSL: Setting lower limit
HYP: Hyperbolicmode
Display formats
Thecalculatorcandisplaynumbersinfourformats:floatingpoint,fixed
point, scientific, and engineering.
Floating point display format
Thefloating point format displaysnumbers in decimal form, usingup
to 10 digits. Any trailing zeros are truncated.
If the result of a calculation is too large to be represented in 10 digits,
thedisplayautomaticallyswitchestoscientificformat. Iftheresultoflater
calculations is small enough to be displayed in 10 digits, the calculator
returns to floating point format.
(Ex.) : Set the display in floating display format.
Step : Press [ 2ndF ] [TAB ] [ • ] DEG 0.
Fixed point display format
Thefixedpoint,scientific,andengineeringformatsuseafixednumber
ofdecimalplacestodisplaynumbers.Ifmorethantheselectednumberof
decimalplacesiskeyed,itwillberoundedtothecorrectnumberofdecimal
places.
(Ex.):Fixthedisplay at 2 decimal places, thenkeyin3.256
Step 1 : press [ 2ndF ] [TAB ] 2 DEG 0.00
Step 2 : key in 3.256 [ = ] DEG 3.26

E-4
Onthecontrary,if fewer than the selected numberofdecimalplaces
is keyed, it will be padded with trailing zero.
(Ex.):Fixthedisplayat4decimalplaces,thenkeyin4.23
Step 1 : press [ 2ndF ] [TAB ] 4 DEG 0.0000
Step 2 : key in 4.23 [ = ] DEG 4.2300
Scientific display format
InScientificdisplayformat,thenumber891500canbe showninscientific
formatas8.915x1005,where8.915iscalledthemantissaand5isasthe
exponentof10.
(Ex.): 7132 x 125is displayed in scientific displayformat.
Step 1 : key in 7132 [ x ] 125 [ = ] DEG 891500.
Step 2 : press [ F↔E ] DEG 8.915 05
(in floating point format)
Besides, entry can be made in scientific notation by using the [EXP]
keyafterenteringthemantissa.
(Ex.):Keythenumber4.82296x105
Step:key in 4.82296 [EXP]5 DEG 4.82296 05
(in floating point format)
Engineering display format
The format is similar to the scientific format, expect the mantissa can
have up to three digits left of the decimal, instead of only one, and the
exponentisalwaysamultipleofthree.Itisusefulforengineerstoconvert
units based on multiplesof 10 3.
(Ex.) : Convert 15V into 15000mV (V : Volt)
Step1:keyin15 DEG 15.
Step 2 : press [ ENG ] twice DEG 15000.– 03
(Ex.) : Convert 15V into 0. 015KV (V : Volt)
Step1:keyin15 DEG 15.
Step 2 : press [ 2ndF ] [ ] twice DEG 0.015 03
Order of operations
Each calculation is performed in the following order of precedence :
1) Operationinparenthesis
2) Functions required pressing the function key before entering, for
example, [DATA] in STATmode and [ EXP] key .
3) Functionsrequiredinputingvaluesbeforepressingthefunctionkey,
forexample, cos, sin, tan, cos–1, sin–1, tan–1, log, ln, X 2,1/x, , ,
, X!, %, RND, ENG, , ,,,, ,, , and 6 units conversion.
4) Fractions

E-5
5) +/–
6) X y,
7) nPr, nCr
8) x , ÷
9) +, –
Correction
Ifyouhavemadeamistakewhenenteringanumber(butyouhavenotyet
pressedanarithmeticoperatorkey),justpress[CE]toclearthelastentry
theninputitagain,or delete individual digits by using the backspace key
[ 00 0 ]
(Ex.) : Correct 12385 as 789
Step : press [ CE ] 789 DEG 789.
(Ex.) : Correct 12385 as 123
Step : press [ 00 0 ] twice DEG 123.
Ina seriesofcalculations,youcancorrecterrors inimmediateresults
by pressing [ON/C] to clear the calculation completely (expect clearing
memory,seepage9).
Ifyou press thewrong arithmetic operation key, justpress [ CE] key
beforeenteringanythingelse.
Accuracy and Capacity
Accuracy : 1 in 10th digit.
Capacity:
In general, every reasonable calculation is displayed up to 10 digit
mantissa,or10-digitmantissaplus2-digitexponentupto10 99orintegers
between–9999999999and9999999999.
Numbersused as input mustbe within the rangeof the given
function. The range for each of the calculator’s functions is given in the
following pages.
Functions Inputrange
sinx,cos x, tan x Deg X4.5 x 10 10 deg
Rad X2.5 x 10 8rad
Grad X5 x 10 10 grad
however,fortanx
Deg X90 (2n+1)
Rad X(2n+1)
Grad X100 (2n+1)
(n is an integer)
X
y
π
2

E-6
sin –1 x, cos –1 x X≤ 1
tan–1x X1 x 10 100
sinhx,coshx X≤ 230.2585092
tanhx X1 x 10 100
sinh –1 x X5 x 10 99
cosh –1 x1≤X 5 x 10 99
tanh–1 x x 1
log x, ln x 1 x 10 –99 ≤X 1 x 10 100
10x–1 x 10 100 X100
ex–1x10100 X≤230.2585092
0≤X 1 x 10 100
x2X1 x 10 50
1/X X1 x 10 100, X 0
X1 x 10 100
X ! 0 ≤X ≤69 , X is an integer.
RP1 x 10 100
PR0≤r1 x 10 100
Deg 4.5 x 10 10 deg
Rad 2.5 x 10 8rad
Grad 5 x 10 10 grad
however,fortanx
Deg 90 (2n+1)
Rad (2n+1)
Grad 100 (2n+1)
(n is an integer)
, ,, DD , MM, SS.SS 1 x 10 100,
0≤MM, SS.SS
, ,, x1 x 10 100
XyX0–1 x 10 100 y log X 100
X = 0 y 0
X 0 y = n, 1/(2n+1), n is an integer.
but -1 x 10 100 log X100
X0y 0, –1 x 10 100 log X 100
X = 0 y 0
X0y = 2n+1, I/n, n is an integer.(n 0)
but – 1 x 10 100 log X100
2
X2+Y2
X
3X
yXy
1
y
1
y
1

E-7
Input Total of integer,numerator and
denominatormust bewithin10digits
(includesdivisionmarks)
Result Result displayed as fraction for
integerwhen integer,numeratorand
denominatorarelessthan1 x 10 10
nPr, nCr 0 rn, n 9999999999, n,r are integers.
STAT x1x10 50 x1 x 10 100
0≤ x21 x 10 100, n, r are integer
_
xn 0 S n 1 n 0
Range = 1 ~ r, 1 ≤n≤r, 80 ≤r≤20400
DEC 0 ≤X≤9999999999 (for zero or positive )
– 9999999999 ≤X≤– 1 (for negative)
BIN 0 ≤X≤0111111111(forzero,positive)
1000000000 ≤X≤1111111111
(for negative)
OCT 0 ≤X≤3777777777 (for zero or positive)
4000000000 ≤X≤7777777777
(for negative)
HEX 0≤X≤2540BE3FF( for zero or positive)
FDABF41C01 ≤X≤FFFFFFFFFF
(for negative)
Overflow / Error conditions
A symbol “ E ” are indicated on the display when any of the following
conditionsoccurandfurthercalculationbecomesimpossible.Justpress
[ ON/C ] to release those overflow or error indicator and the subsequent
calculationcanthenbeperformed.
1) Whenfunctioncalculationsareperformedwithanumberexceeding
theinputrange.
2) Whenanumberisdividedby0.
3) Whenthe[(]keyisusedmorethan 15timesinasingleexpression.
4) Whenaresult(whetherintermediateorfinal)oraccumulatedtotalin
memoryexceeds the limit. ( 9.999999999 x 10 99)
5) Whenmorethansixpendingoperations.
Basic calculation
Before performing the following calculation, check to see that your
calculator is in decimal base and floating point display.
ab/c

E-8
Mixed arithmetic calculation
1 + 2 x 3 = ? 1 [ + ] 2 [ x ] 3 [ = ] DEG 7.
– 3.5 + 8 ÷ 2 = ? 3.5 [ +/– ] [ + ] 8 [ ÷ ] 2 [ = ] DEG 0.5
Parentheses calculations
Operationinsideparenthesesarealwaysexecutedfirst.Youcanuseup
to15levelsofparenthesesinasinglecalculation.Whenthefirstparenthesis
isopened,the“( ) ” indicator appears and remainsinthedisplayuntilthe
last parenthesis is closed.
( 5 – 2 x 1.5 ) x 3 [ ( ] 5 [ – ] 2 [ x ] 1.5 [ ) ] [ x ] DEG 2.8
+ 0.8 x ( – 4 ) = ? 3 [ + ] 0.8 [ x ] 4 [ +/– ] [ = ]
2 x { 7 + 6 x ( 5 + 4 ) } 2 [ x ] [ ( ] 7 [ + ] 6 [ x ] DEG 122.
= ? [ ( ] 5 [ + ] 4 [ = ]
(Note) : It is unnecessary to press the [ ) ] key before the [ = ] key.
Constant calculation
Thecalculatorenablesyou to repeat the last numberenteredorthe
lastoperationexecuted by pressing [=]key.
Repeating the last number
3 x 3= ? 3 [ x ] [ = ] DEG 9.
3 x 3 x 3 = ? [ = ] DEG 27.
3 x 3 x 3 x 3 = ? [ = ] DEG 81.
Repeating the arithmetic operation
321 + 357= ? 321 [ + ] 357 [ = ] DEG 678.
654 + 357= ? 654 [ = ] DEG 1011.
579 – 159 = ? 579 [ – ] 159 [ = ] DEG 420.
456 – 159 =? 456 [ = ] DEG 297.
18x45= ? 3 [ x ] 6 [ x ] 45 [ = ] DEG 810.
18x23=? 23 [ = ] DEG 414.
18 x (0.5 x 10 2) = ? 0.5 [ EXP ] 2 [ = ] DEG 900.

E-9
96 ÷8=? 96 [ ÷ ] 8 [ = ] DEG 12.
75 ÷8=? 75 [ = ] DEG 9.375
(1.2 x 10 2)÷8 =? 1.2 [ EXP ] 2 [ = ] DEG 15.
Percentage calculation
30% of 120 = ? 120 [ x ] 30 [ 2ndF ] [ % ] DEG 36.
[ = ]
70% of 120= ? 70 [ 2ndF ] [ % ] [ = ] DEG 84.
88 is 55%of 88 [ ÷ ] 55 [ 2ndF ] [ % ] DEG 160.
whatnumber =? [ = ]
30%add-onof120 120 [ + ] 30 [ 2ndF ] [ % ] DEG 156.
= ? [ = ]
30%discountof120 120 [ – ] 30 [ 2ndF ] [ % ] DEG 84.
= ? [ = ]
Memory calculation
Youshouldkeepthefollowingrulesinmindwhenperformingmemory
calculations.
1) The“M”indicatorappearswhenanumberisstoredinthememory.
2) Recalling from a memory by pressing [ MR ] key does not affect its
contents.
3) AllmemoriesareunavailableunderSTATmode.
4) Inordertoexchange thecontentofthememoryforthe
displayed number, please press [X M] key.
5) The contents of the memories can be cleared by pressing [ 0 ]
[X M] or [ CE ] [X M] in sequence.
[ CE ] [X M] DEG 0.
3 x 5 3 [ x ] 5 [ M+ ] M DEG 15.
+) 56 ÷ 7 56 [ ÷ ] 7 [ M+ ] M DEG 8.
+) 74 – 8 x 7 74 [ – ] 8 [ x ] 7 [ M+ ] M DEG 18.
Total = ? [ MR ] M DEG 41.
0 [X M] DEG 0.
Scientific calculation
Beforeperformingthefollowing calculation, check to see that your
calculatorisfixed at 2 decimal placesdisplayformat.

E-10
5
3
15
124
15
4
9
44 3
36
7
Reciprocal, Factorial
= ? 1.25 [ 2ndF ] [1/X] [ = ] DEG 0.80
5! = ? 5 [ 2ndF ] [ X! ] [ = ] DEG 120.00
Square, Square / Cubic Root, Power, Root
22+ 3 4= ? 2 [ X 2] [ + ] 3 [ X y] 4 [ = ] DEG 85.00
5 x + 5 [ x ] 27 [ 2ndF ] [ 3] DEG 20.83
= ? [ + ] 34 [ ] [ = ]
= ? 72 [ 2ndF ] [ ] 9 [ = ] DEG 1.61
Logarithms and Antilogarithms
ln7 + log100 = ? 7 [ ln ] [ + ] 100 [ log ] [ = ] DEG 3.95
10 2= ? 2 [ 2ndF ] [ 10 x] [ = ] DEG 100.00
e5– e – 2 = ? 5 [ 2ndF ] [ e x] [ – ] DEG 148.28
2 [ +/– ] [ 2ndF ] [ e x] [ = ]
Fraction calculation
Fraction value display is as follow :
(Note) : Totalofinteger,numerator anddenominatormustbewithin 10
digits,orthe fractional valuecouldn’tbeshowncompletely.
Bypressing[2ndF][ d/e],thedisplayedvaluewillbeconvertedtothe
improperfraction.
+ 7 2 [a b/c ] 3 [ + ] DEG84 15
= 8 7 [ab/c ] 3 [a b/c ] 5 [ = ]
= [ 2ndF ] [ d/e ] DEG 124 15
When apressof[ab/c]keyafterthe [=]keyor afraction performed
with a decimal, the answeris displayed as a decimal.
5 + 3 5 [a b/c ] 4 [a b/c ] 9 DEG 9 736
= 9 [+] 3 [a b/c ] 3 [a b/c ] 4 [ = ]
= 9.19 [ab/c ] DEG 9.19
512 Display of 12
5
56 512 Display of 56 12
5
3
2
1.25
1
X
y
27
3
72
9
34

E-11
8 + 3.75 8 [ab/c] 4 [ab/c ] 9 DEG 12.19
=12.19 [ + ] 3.75 [ = ]
During a fraction calculation, if the figure is reducible, a figure is
reducedto thelowesttermsafter pressingafunctioncommand key([+],
[ – ], [ x ] or [ ÷]) or the [ = ] key.
3 = 8 3 [ab/c] 119[ab/c] 21 DEG 82 3
[ = ]
If total of integer, numerator and denominator exceeds 10 digits
(includingdivisionmarks),theresultanswerwillbedisplayedasadecimal.
12345 + 5 12345[ab/c ] 5 [a b/c ]16 DEG 12350.77
=12350.77 [+] 5 [a b/c ] 6 [ab/c ] 13 [=]
Angular units conversion
The calculator enables you to convert aangular unit among degrees
(DEG), radians(RAD), and grad(GRAD).
The relation among the three angle unitsis :
180 °= rad = 200 grad
1) To change the default setting to another setting, press [DRG] key
repeatedlyuntiltheangularunityouwantisindicatedinthedisplay.
2) Afterenteringanangle,press[2ndF][DRG ]repeatedlyuntilthe
convertedvalueisdisplayed.
90 °(deg) 90 DEG 90
= ? (rad) [ 2ndF ] [ DRG ]RAD 1.57
= ? (grad) [ 2ndF ] [ DRG ]GRAD 100.00
Trigonometric / Inverse trigonometric functions
Whenusing thosekey,make surethecalculatorissetfor the angular
unityouwant.
3 sin 85 °= ? 3 [ x ] 85 [ sin ] [ = ] DEG 2.99
cos ( rad) = ? [ 2ndF ] [ ] [ ÷ ] 4 [ = ] RAD 0.71
[ cos ]
tan 150grad = ? 150[tan] GRAD –1.00
sin –1 0.5 = ? deg 0.5 [ 2ndF ][ sin –1 ]DEG 30.00
9
4
21
119 3 2
16
513 6
4

E-12
cos –1( ) = ? rad 2 [ ] [ 2ndF ] [ 1/X ] RAD 0.79
[ 2ndF ] [ cos – 1 ]
tan –1 1 = ? grad 1 [ 2ndF ] [ tan –1 ]GRAD 50.00
Hyperbolic / Inverse hyperbolic functions
cosh1.5+sinh1.5= 1.5 [ HYP ] [ cos ] [ + ] DEG 4.48
1.5 [ HYP ] [ sin ] [ = ]
sinh –1 7 = 7 [ HYP ] [ 2ndF ] [ sin –1 ]DEG 2.64
tanh 1= 1 [ HYP ] [ tan ] DEG 0.76
Rectangular / Polar coordinates
RectangularCoordinates PolarCoordinates
a + b i= r (cos + i sin )
(Note) :When using those key, make sure the calculator is set for the
angularunityouwant.
Converting from Rectangular to Polar
If a = 5 and b = 6 5 [ a ] 6 [ b ] DEG 7.81
, what are r and ? [ 2ndF ] [ R P]
[b ] DEG 50.19
Converting from Polar to Rectangular
If r = 25 and = 56° 25 [ a ] 56 [ b ] DEG 13.98
,whatare aandb? [ 2ndF ] [ P R]
[b ] DEG 20.73
Permutations, Combinations
nPr = nCr =
Howmany 7 [ 2ndF ] [ nPr ] 4 [ = ] DEG 840.00
permutationsof4
itemscanyouselect
out of a set of
numbersof7items?
r ! (n – r) !
n !
(n – r) !
n !
• P( r, )
0X
Y
r
0X
Y
• P( x, y )
x
y
2
1

E-13
Howmany 7 [ 2ndF ] [ nCr ] 4 [ = ] DEG 35.00
combinationsof4
itemscanyouselect
out of a set of
numbersof7items?
Sexagesimal ↔↔
↔↔
↔Decimal form conversion
Thecalculatorenablesyouto converts the sexagesimal figure
(degree, minute and second) to decimal notation by pressing [ , ,, ]
andconvertsthedecimalnotationtothesexagesimalnotationby[2ndF]
[, ,, ].
Sexagesimalfigurevaluedisplayisasfollow:
(Note) :The total of DD, MM and SS.SS must be within 8 digits, or
thesexagesimalcouldn’tbeshowncompletely.
Converting from Sexagesimal to Decimal
12deg.,45min., 12 [ , ,, ] 45 [ , ,, ]DEG 12.76
30.5 sec.=? 30.5 [ , ,, ]
Converting from Decimal to Sexagesimal
2.12345=? 2.12345 [ 2ndF ] [ , ,, ]2
724 42
Base-n mode calculation
Converting between bases
Theunitenables youtocalculateinnumber base otherthandecimal.
The calculator can add, subtract, multiply, and divide binary, octal, and
hexadecimalnumbers.Select the numberbaseyouwant by the[ BIN],
[OCT], [ HEX], [ DEC] keys. The BIN, OCT, and HEX indicators
showyouwhichbaseyouareusing.(ifnoneoftheindicatorsappearsinthe
appearinthedisplay,youareindecimalbase.)
Thekeys active in each base isdescribed as follows :
Binary base : [ 0 ] [ 1 ]
Octal base : [ 0 ] ~ [ 7 ]
Decimal base : [ 0 ] ~ [ 9 ]
Hexadecimal base : [ 0 ] ~ [ 9 ], [ A ] ~ [ F ]
31(base10) [ 2ndF ] [ DEC ] 31 DEG 31.
= ? (base 2) [ 2ndF ] [ BIN ] DEG BIN 11111.
= ? (base 8) [ 2ndF ] [ OCT ] DEG OCT 37.
= ? (base 16) [ 2ndF ] [ HEX ] DEG HEX 1F.
12 45 30 5Represent12degrees,
45 minutes, 30.27 seconds

E-14
4X1B(base16) [ 2ndF ] [ HEX ] DEG HEX 6C.
4 [ x ] 1B [ = ]
= ? (base 2) [ 2ndF ] [ BIN ] DEG BIN1101100.
= ? (base 10) [ 2ndF ] [ DEC ] DEG 108.00
= ? (base 8) [ 2ndF ] [ OCT ] DEG OCT 154.
Negative and Complements
Inbinary, octal, andhexadecimalbases, the calculator represents
negativenumbersusingcomplementnotation.Thecomplement isthe
resultof subtractingthatnumberfrom10000000000inthatnumber’s
baseby pressing [+/– ] key innon-decimal bases.
Calculatethe [ 2ndF ] [ BIN] 11011 DEG BIN
complementofbinary [ +/– ] 1111100101.
number 11011
Complex numbers calculation
Selectthecomplexnumbers modebypressing[CPLX]key and
make sure “ CPLX ” indicator appears on the display. The calculator
enablesyoutoadd,subtract,multiply,anddividecomplexnumbers.
Complex numbers are generally represented as a + b i, where a is a
real and b is imaginary.
[ 2ndF ] [ CPLX ] DEG CPLX
( 7– 9 i ) 7 [ a ] 9 [ +/– ] [ b ] 22.00
+ (15 + 10 i) = ? [ + ] 15 [ a ] 10 [ b ] [ = ]
[b ] DEG CPLX 1.00
(Note):Memorycalculationisavailableincomplexnumbermode.
Random numbers and Exchange key
Randomkey
Pressing [ RND ] key enables the display to generate random
numbersbetween0.000and0.999.
Step : press [ 2ndF ] [ RND ] DEG 0.231
Exchangekey
Pressing [ 2ndF ] [ X↔Y ] enables the displayed value to exchange
asthepreviousvalue.
123 + 456 = ? 123 [ + ] 456 [ = ] DEG 579.00
[ 2ndF ] [ X↔Y] DEG 456.00
[ 2ndF ] [ X↔Y] DEG 579.00

E-15
Unit conversion
in↔↔
↔↔
↔cm
12 in = ? cm 12 [ A B ] [ 2ndF ] DEG 30.48
[in↔cm]
98cm= ? in 98 [ 2ndF ] [ A B ] DEG 38.58
[ 2ndF ] [ in↔cm ]
(Note) : Theoperating procedure for unitconversionkey,[ ↔],
[mmHg↔Kpa], [ gal↔l], [ lb↔kg ], [OZ↔g],issimilartothe
aboveexample.
Statistics calculation
Computing single variable statistics
Select the mode by pressing [ STAT ] key and make sure “ STAT ”
indictorappearson the display.
TheSTATmodeenablesyoutocalculate thefollowingsinglevariable
statistics :
n numberofalldata
x sumof all data
x2sum of the squares
_
xmeanvalue
s SampleStandarddeviation
Populationstandarddeviation
CP Precisioncapability
CPK Process capability Min(CPU, CPL)
where CPU = CPL =
(Note) : In STAT mode, all function key are available, except base-n
calculation.
(Ex. 1) : Enter the following data to calculate x, x2, n, _
x, S, CP,
and CPK , where data 1 = 2, data 2~5 = 5, data 6-8 = 9, USL
value:12,LSLvalue:2
InSTATmode [ 2ndF ] [ STAT] DEG STAT 0.00
Enter all data [DATA] 2 DEG STAT 2.
[DATA] 5 DEG STAT 5.
3– LSLx
6
USL – LSL
x
3
USL –
x2–x)2/ n
n
x2–x)2/ n
n – 1

E-16
CPK
CPK
[DATA] 5 DEG STAT 5.
[DATA] 5 DEG STAT 5.
[DATA] 5 DEG STAT 5.
[DATA] 9 DEG STAT 9.
[DATA] 9 DEG STAT 9.
[DATA] 9 DEG STAT 9.
[ = ] DEG STAT 0.00
_
x=? [ _ x] DEG STAT 6.13
n = ? [n ] DEG STAT 8.00
S = ? [S] DEG STAT 2.59
x = ? [ 2ndF] [ x ] DEG STAT 49.00
x2= ? [ 2ndF ] [ x2]DEG STAT 347.00
= ? [ 2ndF ] [ ]DEG STAT 2.42
CP = ? [ 2ndF ] [ CP ] 12 DEG STAT 12. USL
[ = ] 2 DEG STAT 2. LSL
[ = ] DEG STAT 0.69
CPK = ? [ 2ndF ] [ CPK ] DEG STAT 12.00 USL
[ = ] DEG STAT 2.00 LSL
[ = ] DEG STAT 0.57 CPK
(Note) : Thecalculator keeps arecord of all the entries youmakeand
theseentriesareretainedevenifautopower-offorturningoff,
unlessexitingSTATmode.
Viewing statistics data
Pressing[DATA]or[=]keyunderEDmodecanviewthestatisticsdata
youhaveentered.Thedifferencebetween [DATA] and[ = ] istheitem of
the data entry appears 1.5 sec. before the value by [DATA], the value
appearsimmediatelywithouttheitemby[=].
(Ex.2): View the statistics data basedon Ex. 1.
Step 0 : Press [ 2ndF ] [ EDIT ] to enter ED mode.
(Method 1) :
Step 1 : Press [DATA] once to view the first data.
DEG ED STAT 1.5 sec. DEG ED STAT
dAtA 1 2.00
Step 2 : Continue pressing [DATA] once for each data, it
willdisplaydata 2, 5.00, data3,5.00,data4,
5.00,data5,5.00,data6,9.00,data7,9.00,data8,
9.00insequence.
CP
CP
CP

E-17
x
(Method 2) :
Step 1 : Press [ = ] once to view the first data
DEG ED STAT 2.00
Step2: Continue pressing [ = ] once for each data, it will
display5.00,5.00,5.00,5.00,9.00,9.00,9.00in
sequence.
Adding a data entry
(Ex.3): Add data9 = 10 to Ex.1
Step 1 : Press [DATA] 10 DEG ED STAT 10.
Step 2 : The calculator updates the statistics as you enter
data. You can then recall all variable statistics to
get the following result : = 6.56, n = 9.00, S = 2.
74, x = 59.00, x2= 447.00, = 2.59, where
data 1 = 2.00, data 2~5 = 5.00, data 6~8 = 9.00,
data9=10.00
Editing statistics data
(Ex.4) : Based on Ex.1, correct data 1 = 2 as data 1 = 3
Method 1 :
Press 2 [ 2ndF ] [ DEL ] 3 to overwrite.
Method 2 :
Step 1 : Press [ 2ndF ] [ EDIT ] DEG ED STAT 0.00
Step 2 : Find out 2 by [DATA] or [ = ] DEG ED STAT 2.00
Step 3 : Enter 3 to overwrite 2 DEG ED STAT 3.
Step4: Press [ = ] and [ 2ndF ] [ EDIT ] to exit ED mode,
wherethosedata are changedasdata1= 3.00,
data 2~5 = 5.00, data 6~8 = 9.00.
(Ex.5):Based on Ex.1, delete data1=2 .
Method 1 :
Press 2 [ 2ndF ] [ DEL ] to delete 2.
Method 2 :
Step 1 : Press [ 2ndF ] [ EDIT ] DEG ED STAT 0.00
Step 2 : Find out 2 by [DATA] or [ = ] DEG ED STAT 2.00
Step 3 : Press [ 2ndF ] [ DEL ] DEG ED STAT 5.00
Step 4: Press [ 2ndF ] [ EDIT ] to exit ED mode, where
thosedataare changed as data 1~4 =5.00,data
5~7= 9.00.

E-18
Delete error
(Ex.6):Ifyou enter and delete a value that isn’t includedinthestored
data by mistake, “dEL Error ” appears, but the previous data are still
retained,forexample,delete7basedonEx.1.
Step 1 : Press 7 [ 2ndF ] [ DEL ] DEG STAT
dEL Error
Step 2 : Press any key to clear it DEG STAT 0.00
Step3: Enter EDmode, then view data by [DATA ] or [ = ],
wherethosedataarestilldata1=2.00,data2~5= 5.
00,data6~8 =9.00.
(Ex.7):BasedonEx.1,enter5x5and delete it.
Step 1 : Press 5 [ x ] 5 [ 2ndF ] [ DEL ] DEG STAT
dEL Error
Step 2 : Press any key to clear it DEG STAT 0.00
Step3: Enter EDmode, then view data by [DATA] or [ = ],
wherethosedataarechangedasdata1=2.00,data
2~4 = 9.00.
Weighted data entry method
Insteadofenteringdirectlyeachdata,whenoftenseveralitemofdata
have the same value, you can enter the value and the number of occur-
rencesupto255.ThedatabasedonEx.1canberewrittenandenteredas
follow :
Value Numberofoccurrences Alternativemethod
21 [DATA]2
5 4 [DATA] 5 [ x ] 4
9 3 [DATA] 9 [ x ] 3
, where data 1 = 2, data 2~5 = 5, data 6~8 = 9.
UnderEDmode,whenyoucontinuechoosingavaluefromdata2~5and
correctingit as33,thepermutation amongthosedata willbechangedas
data1=2,data2~4=5,data5=33,data6~8=9,wherethenewvalue33
is inserted after data 4 = 5.
(Note):A“FULL”isindicatedwhenanyofthefollowingconditionsoccur
andfurther dataentrybecomesimpossible. Justpressingany
key can clear the indicator. The previous data entries are still
retainedunlessexitingSTATmode.
1) If the times of data entry by [DATA] is more than 80
2) Thenumberofoccurrencesis more than 255
3) n 20400 (n =20400appearswhenthetimesof data entry by
[DATA] are up to 80 and the number of occurrencesfor each
valueare all 255, i.e. 20400 = 80 x255.)