Instruction/ maintenance manual of the product FX-820MS Casio
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http://world.casio.com/edu_e/ fx-820MS User's Guide E.
CASIO ELECTRONICS CO., LTD. Unit 6, 1000 North Circular Road, London NW2 7JD, U.K..
E-1.
E-2 Safety Precautions Be sure to read the follo wing safety precautions before using this calculator. Keep this man ual handy f or later reference. Caution This symbol is used to indicate information that can result in personal injury or material damage if ignored.
E-3 • The displa ys and illustr ations (such as ke y markings) shown in this User’ s Guide are f or illustr ativ e pur poses only , and ma y differ somewhat from the actual items they represent. • The contents of this manual are subject to change with- out notice.
E-4 Ta ke care ne ver to lea ve the calculator where it might be splashed b y w ater or e xposed to large amounts of hu- midity or dust. Such conditions can damage internal cir- cuitr y . • Never drop the calculator or otherwise subject it to strong impact.
E-5 Contents Safety Precautions .................................. 2 Handling Precautions ............................. 3 Tw o-line Display ...................................... 7 Before getting started... .......................... 7 k Modes .......
E-6 k Angle Unit Conversion ......................................... 20 k Coordinate Conversion (P ol ( x , y ), Rec ( r , θ )) ..... 21 k Engineering Notation Calculations ....................... 21 Statistical Calculations ........................
E-7 The two-line displa y makes it possible to view both the calculation formula and its result at the same time. • The upper line shows the calculation formula. • The lower line shows the result. A separator symbol is displayed every three digits when the integer part of the mantissa has more than three dig- its.
E-8 Note! •T o retur n the calculation mode and setup to the initial def aults shown below, press A B 2 (Mode) = . Calculation Mode: COMP Angle Unit: Deg Exponential Display Format: Norm 1 Fraction Display Format: a b / c Decimal Point Character: Dot • Mode indicators appear in the upper par t of the displa y .
E-9 k Replay Function • Every time you perform a calculation, the replay function stores the calculation formula and its result in replay memory . Pressing the [ ke y d isplays the f or m ula and result of the calculation you last performed. Pressing [ again back steps sequentially (new-to-old) through past calculations.
E-10 k Exponential Display Formats This calculator can display up to 10 digits. Larger values are automatically displayed using exponential notation. In the case of decimal values, you can select between two formats that determine at what point exponential notation is used.
E-11 COMP •P ress the number key ( 1 or 2 ) that corresponds to the setting you want to use. 1 (Dot): Period decimal point, comma separator 2 (Comma): Comma decimal point, period separator k Initial.
E-12 1 5 2 3 13 15. 00 13 15 • Example 1: 2 C 3 + 1 C 5 = 1 2 • Example 4: 1.6 2.1 1 C 2 + 1.6 = 4 11 12. 00 • Example 2: 3 1 4 3 C 1 C 4 + 1 C 2 C 3 = 2 3 1 4 11 12 • Example 3: 2 C 4 = 2 4 1 2 • Results of calculations that mix fraction and decimal val- ues are always decimal.
E-13 u Mix ed Fraction ↔ Impr oper Fraction Conversion • Example: 1 ↔ 1 C 2 C 3 = A B A B 5 3. 00 1 2 3. 00 5 3 2 3 1 2 3. 00 •Y ou can use the displa y setup (Disp) screen to specify the display format when a fraction calculation result is greater than one.
E-14 • Example 4 : To discount 3500 by 25% (2625) 3500 - 25 A v , • Example 5 : To discount the sum of 168, 98, and 734 by 20% (800) 168 + 98 + 734 = g A j q p q - 20 A v , *A s shown here, if y o.
E-15 • Example 2: To perfor m the f ollo wing calculation: 12 ° 34’56” 3.45 12 I 34 I 56 I - 3.45 = 43 ° 24 ° 31.2 k FIX, SCI, RND •T o change the settings f or the number of decimal pl.
E-16 COMP • Example 2: 1 3, displaying result with two significant digits (Sci 2) F ..... 2 (Sci) 2 1 3 = 3.3 –01 SCI •P r e ss F ..... 3 (Norm) 1 to clear the Sci specifica- tion. Memor y Calculations Use the F key to enter the COMP Mode when you w ant to perform a calculation using memor y .
E-17 k Independent Memory •V alues can be input directly into memory , added to memor y , or subtracted from memory . Independent memory is convenient for calculating cumulative totals. •I ndependent memory uses the same memory area as variable M.
E-18 COMP Scientific Function Calculations Use the F key to enter the COMP Mode when you want to perform basic arithmetic calculations. COMP ............................................................. F 1 • Certain types of calculations may take a long time to complete.
E-19 • Example 4: tan 1 0.741 36.53844577 ° q ..... 1 (Deg) A g 0.741 = k Hyperbolic/Inverse Hyperbolic Functions • Example 1: sinh 3.6 18.28545536 M S 3.6 = • Example 2: sinh 1 30 4.094622224 M A j 30 = k Common and Natural Logarithms/ Antilogarithms • Example 1: log 1.
E-20 • Example 2: 3 5 3 27 –1.290024053 A D 5 + A D R D 27 T = • Example 6: 12 R 3 a , 4 a T a = 1 1 3 4 1 • Example 4: 123 30 2 1023 123 + 30 K = • Example 5: 12 3 1728 12 N = 1 7 • Example 3: 7 123 ( = 123 ) 1.
E-21 • Example: To c o n v e r t 4.25 radians to degrees q ..... 1 (Deg) 4.25 A v 2 ( R ) = k Coordinate Conversion (Pol ( x , y ), Rec ( r , θ )) • Calculation results are automatically assigned to vari- ables E and F .
E-22 SD REG SD Statistical Calculations Standard Deviation Use the F key to enter the SD Mode when you want to perform statistical calculations using standard de- viation. SD ................................................................... F 2 •A lways start data input with A B 1 (Scl) = to clear statistical memor y .
E-23 • S S inputs the same data twice. •Y ou can also input multiple entries of the same data using A G . To input the data 110 ten times, for e xample , press 110 A G 10 S . •Y ou can perf or m the abov e ke y oper ations in an y order, and not necessarily that shown above.
E-24 Press 2 to exit data input without registering the value you just input. Press 1 if you want to register the value you just input, without saving it in memor y . If you do this, ho we ver, y ou will not be able to display or edit any of the data you have input.
E-25 •A lways start data input with A B 1 (Scl) = to clear statistical memor y . •I nput data using the k e y sequence sho wn below. < x -data> P < y -data> S •T he values produced by a regression calculation depend on the values input, and results can be recalled using the k e y operations shown in the table below .
E-26 • The values in the above tables can be used inside of expressions the same way you use variables. u Linear Regression • The regression formula for linear regression is: y = A + B x .
E-27 Coefficient of Deter mination = 0.965517241 A X r r 3 K = Sample Covariance = 35 E A U r 3 , A U 3 - A X 1 - A X r 1 F E A U 3 , 1 F = u Logarithmic, Exponential, P o wer, and In verse Regression •U se the same key operations as linear regression to re- call results for these types of regression.
E-28 Regression Coefficient C = – 6.71629667 10 –3 A X r r 3 = n when x i is 16 = –13.38291067 16 A X r r r 3 = m 1 when y i is 20 = 47.14556728 20 A X r r r 1 = m 2 when y i is 20 = 175.5872105 20 A X r r r 2 = Data Input Precautions • S S inputs the same data twice.
E-29 Math ERROR •C auses • Calculation result is outside the allowable calculation range. • An attempt to perform a function calculation using a value that exceeds the allowable input range. • An attempt to perform an illogical operation (division by zero, etc.
E-30 k Order of Operations Calculations are performed in the following order of prec- edence. 1 Coordinate transf or mation: Pol ( x , y ), Rec ( r , θ ) 2 Ty pe A functions: With these functions, the value is entered and then the function key is pressed.
E-31 k Stacks This calculator uses memory areas, called “stacks,” to tem- porarily store values (numeric stack) and commands (com- mand stack) according to their precedence during calcu- lations. The numer ic stac k has 10 le v els and the command stack has 24 le vels.
E-32 k Input Ranges Internal digits: 12 Accuracy * : As a rule, accuracy is ± 1 at the 10th digit. Functions Input Range sin x DEG 0 x 4.499999999 10 10 RAD 0 x 785398163.3 GRA 0 x 4.999999999 10 10 cos x DEG 0 x 4.
E-33 Functions Input Range n C r 0 n 1 10 10 , 0 r n ( n , r are integers) 1 [ n !/{ r !( n – r )!}] 1 10 100 Pol( x , y ) x , y 9.999999999 10 49 ( x 2 + y 2 ) 9.999999999 10 99 Rec( r , ) 0 r 9.
E-34 Power Supply The TW O WA Y PO WER system actually has two power supplies: a solar cell and a G13 T ype (LR44) button battery . Nor mally , calculators equipped with a solar cell alone can operate only when relatively bright light is present.
E-35 Auto Power Off Calculator pow er automatically tur ns off if you do not perform any operation for about six minutes. When this happens, press 5 to turn power back on. Specifications Power Supply: Solar cell and a single G13 T ype button battery (LR44) Battery Life: Approximately 3 years (1 hour use per day) Dimensions: 12.
SA0205-A Printed in China CASIO COMPUTER CO. , L TD . 6-2, Hon-machi 1-chome Shibuya-ku, Tokyo 151-8543, Japan.
An important point after buying a device Casio FX-820MS (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Casio FX-820MS yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Casio FX-820MS - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Casio FX-820MS you will learn all the available features of the product, as well as information on its operation. The information that you get Casio FX-820MS will certainly help you make a decision on the purchase.
If you already are a holder of Casio FX-820MS, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Casio FX-820MS.
However, one of the most important roles played by the user manual is to help in solving problems with Casio FX-820MS. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Casio FX-820MS along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
