Datexx DS-700 User Manual

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Owner's Manual
SCIENTIFIC CALCULATOR
Please read before operating the unit
DS-700
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This Datexx DS-700 Scientific
TABLE OF CONTENTS
culations.
(LCD)
Liquid Crystal Display Format
.....4
Display Symbols .................4
Setting Display Format.............. ....7
Operating the Calculator ...........9
One Factor Operations...........21
FEATURES
Removable protective cover doubles as a base for the calculator.
Large easy to read LCD (Liquid Crystal Display).
Binary-Octal-Hexadecimal-Decimal conversion.
Built-in Random Number Generator. Built-in Trigonometric and Algebraic
Functions.
2 3
Two Factor Operations...........21
Correcting Incorrect Entries ......22
Correcting Overflow Errors........23
Scientific Notation...............25
Percentage.................... 26
Logarithm and Exponential.......26
Trigonometric Calculations........27
Applications and Examples.......28
Business......................28
Physics........................28
Civil Engineering................29
Electronics..................... 30
Parallel Resistance..............31
Care and Maintenance ..........32
Replacing The Batteries..........33
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(LCD) LIQUID CRYSTAL DISPLAY FORMAT
FLOATING POINT DISPLAY
SCIENTIFIC NOTATION DISPLAY
DISPLAY SYMBOLS
Negative symbol
M Memory symbol
2ndF Second function symbol
Appears when 2ndF is pressed, allowing access to alternate key func­tions.
4
HYP Hyperbolic function designation symbol
Appears when a hyperbolic function is designated.
DEG Degree mode symbol
Appears when degree mode is desig­nated or shows that the angular mode of the converted result is in degrees.
RAD Radians mode symbol
Appears when radian mode is desig­nated or shows that theangular mode of the converted result is in radi­ans.
GRAD Grad mode symbol
Appears when grad mode is designat­ed or shows that the angular mode of the converted result is in grads.
( ) Parenthesis symbols
Appears when a calculation with parenthesis is performed by pressing the parenthesis key.
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BIN Binary mode symbol
Appears when the binary mode is set or the displayed result is a binary number.
OCT Octal mode symbol
Appears when the octal mode is set or the displayed result is an octal num­ber.
HEX Hexadecimal mode symbol
Appears when the hexadecimal mode is set or the displayed result is a he xa­decimal number.
CPLX
Complex number mode symbol
Appears when the complex number mode is set.
STAT Statistical mode symbol
Appears when the statistical calcula­tions mode is set.
A calculated result is displayed as a float­ing point number within the range of:
0.000000001 1 x 9999999999
Results outside this range are displayed in scientific notation.
SETTING UP DISPLAY FORMAT Display Format
Press TAB key to change format from floating point to scientific notion
Change to scientific notion
Change to floating point
Setting Decimal Point
Press 2ndF, TAB and Number of digit Example: Decimal Point 4
76
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Example: Decimal Point 6
Please note:
Once the decimal point is set, it will remain after power is off, to resume decimal point 2 (default), Please set the decimal point to 2 again.
Example: Setting back to Decimal Point 2
OPERA TING THE CALCULA TOR
Power off key
Press to turn off the calculator. Automatically turns off 8 min­utes after last keypress to con­serve battery power.
Power on and clear / statisti­cal calculation mode key
Press to turn on the calculator or to clear the display.
Press to activate statistical program.The display is cleared and STAT appears in the display. In this mode the ), x -->m, RM and M+ keys func­tion as the n, x, S and DATA keys respectively. Press 2ndF to activate the x, x2, Ó and CD keys.
2nd function key
Press to use alternate func­tions located above most keys.
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Degree / Radian / Grad selector / angular unit con­version key
Use to calculate trigonometric and coordinate conversion.The DRG key changes the angular mode with each press: DEG -> RAD -> GRAD -> DEG.
Used with trigonometric func­tions for arc hyperbolic calcu­lations.
Trigonometric / Inverse Trigonometric function keys
DEG MODE - Entries and
results are in decimal degrees. RAD MODE - Entries and results are in radians.
Press for the desired trigono­metric function. Press 2ndF first for inverse trigonometric
functions. GRAD MODE - Entries and results are in grads.
Display Format Exchange /
Tabulation key
Functions the same as the DEG key. The displayed num­ber is converted into a number of the specified angular mode.
Hyperbolic / Arc Hyperbolic key
Used with trigonometric func­tions for hyperbolic calcula-
Press to change display for-
mat from floating point to sci-
entific notation and back
again.
Press 2ndF, TAB, then a digit
to specify the number of deci-
mal tab places in the dis-
played result.
tions.
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Clear Entry / Factorial key
Press to clear the display of an incorrect number.
Calculates the antilogarithm
base e of the displayed num-
ber. Calculates the factorial of the
displayed number.
Degree / Minutes / Second ƒ Decimal degrees conversion / Hexadecimal number key
Converts degree / minute /
second to decimal degree. Press 2ndF first to convert decimal degree to degree / minute second.
Hexadecimal number D key (HEX mode only).
Natural Logarithm / Antilogarithm number key
Used to obtain the logarithm base e (e= 2.718281828).
Hexadecimal number E key (HEX mode only).
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Common logarithm / antilog-
arithm and hexadecimal
number key
Press to obtain the base 10
logarithm of the displayed number. Hexadecimal number F key (HEX mode only).
Press to obtain the base 10 antilogarithm of the displayed number.
Real number enter / coordi­nate conversion key
Used when the real parts of
complex numbers are entered
and when calling the real
parts of calculated results.
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Used during coordinate conver­sions when entering the x coor­dinate of the rectangular coordi­nate (X, Y) or the r of the polar
Right Shift / Complex num-
ber mode key
Press to delete the last num-
ber key pressed.
coordinate. Also displays the calculated values of X or r.
Press to set the complex num­ber mode.
Press to convert polar coordi­nates to rectangular coordinates
.
Enter Exponent / Pi and Hexadecimal number key
Press to enter a number in
Imaginary number enter / coordinate conversion key
Press to input the imaginary par ts
scientific notation. Hexadecimal number A key (HEX mode only).
of complex numbers or to display the imaginary par ts of a calculat­ed result.
Displays the value of Pi (π) Pi= 3.141592654
During coordinate conversions, press to enter the retangular y
coordinate, or the ø of the polar
y /xy and Hexadecimal number key
coordinates (r, ø).Also used to display the calculated values of y or ø.
Raises the displayed number to a power. Hexadecimal number B key
Press to convert polar coordinates
(HEX mode only).
to rectangular coordinates.
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Calculates the Xth root of Y.
Press to enter an open paren­thesis in the display.
Square root / cube root and hexadecimal number key
Press to exchange the dis­played number with the num­ber from the working register
Calculates the square root of
(x -> y)
the displayed number. Hexadecimal number B key (HEX mode only).
Close parenthesis / statisti­cal calculation key
Calculates the cube root of the displayed number.
Press to enter a close paren­thesis in the display. In statisti­cal mode it displays the number of the samples entered. (n)
Square / reciprocal key
Calculates the square of the
Press to obtain the sum of the data (∑x)
displayed number. Calculates the reciprocal of
the displayed number.
Open parenthesis / exchange key
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Number keys
Press to enter number 0-9.
Division / binary number key Press for division.
Press to convert the displayed number to a binary number(base 2).
Multiplication / Octal num­ber key
Press for multiplication. Press to convert the displayed
number to an octal number(base 8).
Subtraction / Hexadecimal number key
Press for subtraction.
Plus / Decimal number key
Press for addition. Press to convert the displayed
number to a decimal number (base 10).
Memory-in / statistical calcula­tion key
Press to store the displayed num­ber into memory.To clear the memory, press the ON/C key then the x-> m key. In statistical mode, press to obtain the mean value of the data.
Press to obtain the sum of squares of the data (x^3)
Recall memory / Statistical cal­culation key
Displays the contents of the mem­ory. In statistical mode, press to obtain the standard the deviation of the data simple.
Press to convert the displayed number to a hexadecimal number (base 2).
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Press to obtain the standard deviation of the population of data.
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Memory plus / DATA CD key
Press to add the displayed num-
ber to the contents of the
Memory.To subtract the displayed
number from the memory, press
the +/- key first.In statistical mode, press to enter data. In statistical mode, press to delete
a wrong data entry.
ONE FACTOR OPERATIONS
One-Factor operations require the entry of only one mathematical function. The single factor is entered into the calcula­tion when you press the function key. You do not have to press = to complete the calculation.
Some one-factor functions include , cos, sin, tan and log.
Change sign key
Press to change the displayed
number from positive to negative
and vice versa.
Decimal point / random
number key Press to
place a decimal point number in
the display.
Press to generate random num-
bers between 0.000 and 0.999
(Decimal mode only).
Equals /Percent key
Displays the results of arith-
metic and complex calcula-
tions.
Used for percentage calcula-
tions.
Example: sin 90˚ = 1 Enter 90 [ sin ]. 1 is displayed
TWO-FACTOR OPERATIONS Two-Factor operations require the entry of at least two mathematical funtions.The first factor is entered when you press the function key such as +, --, x, ÷, or yx . The second factor is entered when you press the = key and the calculation is completed.
Example: 7 x 5 = 35 Enter 7 [ x ] 5 [ = ] . 35 is diplayed. Two factor functions can be chained
together but algebraic hierarchy is always in effect. To perform a calculation of a lesser
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hierarchy first, press [ = ] to perform the higher hierarchy calculation, then enter the lower hierarchy calculation to get an accurate result.
Example: (10 + 5 ) ÷ 3 = 5
CORRECTING OVERFLOW ERRORS
If a calculated result exceeds the dis­play ability or the memory capacity, the display stops and E appears in the display. Press [ ON/C ] to
resume calculating. Incorrect: 10 [+] 5 [÷] 3 = 11.6667 Correct: 10 [+] 5 [=] 15
[÷] 3 = 5
With this method, calculations can be performed in the proper order.
CORRECTING INCORRECT ENTRIES
If you press the wrong function key ( +, --, x, or ÷ ), just press the correct function after pressing the wrong one. The calculator preforms the last function pressed.
Example: If you press the 5 + -- x 5 =, the displayed result will be 25 as [ x ] was the last function key pressed.
If you press the wrong number key, press [ ON/C ] once to clear the last entry, or twice to clear all entries made. Entries made with the memor y keys are not affected.
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The range of calculated results and
memory capacity are within the
range of 1 x 10 -99 to 9.9999999 x
10 99
An error also occurs if you try to
divide a number by 0 or extract the
square root of a negative number.
CALCULATION EXAMPLES MIXED
2 x 8 - ( 3 + 5 ) x 4 - 6 x 7 = 20
4.3 - 1.8
Press
3 [+] 5 [=] [x] 4 [= ] [M+] 6 [x] 7 [+/– ] [=] [M+]
4.3 [–] 1.8 [=] [÷] [RM] [=] [2ndF] [1/x] [+/–] [x-->M] 2 [x] 8 [=] [M+] [RM]
Memory
Display
Contents
M 32 32 M–42 –10 M2.5 –10 M–4 –10 M 4 4 M 16 20 M 20 20
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CONSTANT AND REPEAT
When performing calculations, the last function and number entered are retained as a constant.
Examples: To calculate 7 + 5 + 5 + 5 = 22
Press 7 [ + ] 5 [ = ] [ = ] 22 In this case [ + ] and 5 are the con­stants.
To calculate 2 + 3 = 5 and 4 + 3 = 7 Press 2 [ + ] 3 [ = ] 5 5
4 [ = ] 7
In this case [ + ] and 3 are the con­stants.
When calculating powers 5 2 = 25 and 4 2 = 16
SCIENTIFIC NOTATION
Calculate
(72.5 x 10 20= 1.75 x 10 20)
(-4.7 x 10
= -1.57978 x 10
To Calculate
(72.5 x
20
10
1.75 x
20
10 ) ÷ (–4.7
–11
x 10 = –1.57978
32
x 10
-11
32
Press
(72.5 [EXP] 20 [+]
1.75 [EXP] 20 [=]
[÷] 4.7 [+/–] [EXP]11[+/–]
[=]
)
Display
7.425 21
–1.5797872 32
7.25 21
–4.7 –11
Press 5 [ yx] 2 [ = ] 25
4 [ = ] 16
In this case [ yx ] 2 is the constant.
If a result is displayed in scientific
notation, you can press [ F <--> E ]
to convert the number to floating
point and vice- versa.
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PERCENTAGE
To Calculate
6% of 1250 =75
65 + 15% =74.75
129.95 – 10% =116.955
Press
1250 [X] 6 [2ndF][%][=]
65 [+] 15 [2ndF][%][=]
129.95 [–] 10 [2ndF][%][=]
Display
75
74.75
116.955
LOGARITHM AND EXPONENTIAL
To Calculate
log 0.02
Press
0.02 [log]
= –1.69897 In (50/3)
=2.8134107
10
7 =2.82475x10
5x
56 =2.236854
50 [÷] 3 [=] [In]
7[y ] 10
8
[=] 56 [y ] 3
5 [2ndF] [1/x] [=]
Display
–1.698970004
2.813410717
282475249
56
5
2.236853829
TRIGONOMETRIC CALCULATIONS
Repeatedly press DEG to select degrees, radians or grads as the trigonometric unit.
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To calculate
cos-1 0.5 = 66.666666 grads
Angular Mode
GRAD
Press
0.5 [2ndF] [cos ]
Display
–1
6.666667
To calculate
tan π/5 = 0.72654253
Angular Mode
RAD
Press
[2ndF] [π] [÷] 5 [=] [tan]
Display
0.62831853
0.726542528
To calculate
sin 30˚ x 5 = 1.118034
Angular Mode
DEG
Press
30 [sin] [x] 5 [√] [=]
Display
1.118033989
To calculate
90˚ = 1.5707963 radians
= 100 grads
Angular Mode
DEG RAD GRAD
Press
90 [2ndF] [DRG->] [2ndF] [DRG->]
Display
1.570796327
0.5
90
100
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APPLICATIONS AND EXAMPLES
CIVIL ENGINEERING BUSINESS
Calculate the future value of a $1000 invest­ment compounded annually at a rate of 6% for 7 years.
FV = p (1+i )n
= 1000 (1+0.06) 7 = 1503.63
Press
1 [+] 0.06 [=] [y ] 7
x
[=] [X] 1000 [=]
Display
1.503630259
1503.630259
PHYSICS
If a ball is thrown upwars with a velocity of 75 feet per second, what is its velocity at the end of 1.6 seconds
( g = 32.2 ft/sec2) ? Velocity: V = Vo - gl
Height: S = Vol - 1/2 gl2
Press
75 [–] 32.2 [X] 1.6 [=]
75 [X] 1.6 [–] 2 [2ndF][1/x][X]
32.2 [X] 1.6 [X ] [=]
= 75 - ( 32.2 x 16)
= 23.48 ft/sec. =
(75 x1.6)– (1/2 x 32.2 x (1.6 )2)
= 78.784 ft.
2
Display
78.784
23.48
0.5
Trigonometric Functions
In this right triangle,
A = 5.7 feet and a = 30 degrees.
Determine the value of C.
sin a = A/C
sin 30 degrees = 5.7/C
C = 5.7 / sin 30 degrees
C = 5.7 / 5
C = 11.4
Angular
Press
Mode
DEG
5.7 [÷] 30 [sin] [=]
28 29
Display
5.7
0.5
11.4
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In another right triangle, A = 6 feet and C = 15 degrees. Determine the value of a, b and B.
sin a = A /C sin a = 6 / 15 = 0.4 sin-1 .4 = 23.58
a = 23.58 degrees b = 90 - 23.58 = 66.42 degrees
cos a = B / C cos 23.58 = B /15 B = cos 23.58 x 15
B = .92 x 15 = 13.75 feet
ELECTRONICS
Amplifier Gain
Calculate the value of Av
Voltage gain AV= 20 log Vo/ Vi
= 20 log 3
Angular
Press
Mode
DEG
30 31
0 [X->M] 6 [÷] 15 [=] [2ndF] [sin ] [M+] 90 [–] [RM] [=] 0 [X->M]
23.58 [cos] [X] 15 [=]
–1
Display
0.4
23.57817848 M 32.57817848 M 66.42182152
0.916502421
13.74753633
0 6
0
Press
3 [÷] [EXP] 3 [+/– ] [=] [log] [X] 20 [=]
=69.54242509dB
-3
1x10
Display
1.–03
3.477121225
69.54242509
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PARALLEL RESISTANCE
Three resistors are connected in par­allel. Their values are 540 ohms, 470 ohms and 680 ohms. Calculate the total equivalent resist­ance.
REPLACING THE BATTERIES
This calculator is powered by two internal batteries LR 44 or A76. If the display gets dim or calculations slow down the batteries should be replaced.
To replace the batteries:
Req = 1
1 + 1 + 1
1.Remove the six screws on the back of the calculator and lift off the back cover.
R1 R2 R3
2.Replace the two batteries located near
Req = 1
1 + 1 + 1 680 470 540
Press
680 [2ndF] [1/x ] [+] 470 [2ndF] [1/x ] [+] 540 [2ndF] [1/x ] [=] [1/x ]
Display
0.001470588
0.003598247
0.005450 100
183.4828833
CARE AND MAINTENANCE
Attempting to modify or tamper with
the tip of the calculator with new batteries following the polarity shown in the illustra­tion.
3.Replace the back cover and screws.
BATTERY PRECAUTIONS
1.Only use the size and type of batteries specified.
2.Follow the correct polarity when installing the batteries. Reversed batter­ies can cause damage to the calculator.
the caclulator’s interal components can cause a malfunction and invali­date the warranty.
32 33
3.If the calculator is not going to be used for a long period of time, remove the bat­teries to prevent the damage or injury from possible battery leakage.
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Datexx Limited Warranty
This product is warranted against defects for 1 year from date of purchase. Within this period, we will replace or repair it, at our option, without charge for parts and labor, with the exception of accessories such as batteries, wallets, etc.
Return the defective unit with proof of purchase and a check or money order for $5.00 (to cover postage, insur­ance and handling) to T eledex Service Center, 1 Atlas St., Kenilworth, NJ, 07033.
This warranty does not cover products subjected to misuse, accidental damage, or repair by other than TELEDEX. In no event shall TELEDEX be liable for consequential econom­ic damage or damage to property.
Except as provided herein, DATEXX makes no express warranties and any implied warranties are limited in dura­tion to the written limited warranties contained herein. Some states do not permit limitation or exclusion of implied warranties; therefore, the aforesaid limitation(s) or exclu­sion(s) may not apply to the purchaser.
This warranty gives you specific legal rights and you may also have other rights which vary from state to state.
© 2000 Teledex
All Rights Reserved.
Datexx is a trademark of Teledex Inc.
WWW.DATEXX.COM
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