Casioメーカーfx-991ESの使用説明書/サービス説明書
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http://world.casio.com/edu/ RCA502160-001V01 E fx-115ES fx-991ES User's Guide.
CASIO Europe GmbH Bornbarch 10, 22848 Norderstedt, Germany.
E-1 About this Manual • The MA TH mark indicates an example that uses Math f ormat, while the LINE mark indicates Linear format. For details about input/output f or mats, see “Specifying the Input/Output F ormat”. •K e ycap mar kings indicate what a ke y inputs or what function it performs.
E-2 • The follo wing shows an example of ho w a key oper ation to select an on-screen menu item is represented in this User’ s Guide. Example: 1 (Setup) Indicates the menu item that is selected b y the number ke y operation ( 1 ) bef ore it. Note that this is not part of the actual ke y operation you perf orm.
E-3 Safety Precautions Be sure to read the f ollowing safety precautions bef ore using this calculator . K eep this manual handy for later ref erence. Caution This symbol is used to indicate inf or mation that can result in personal injury or mater ial damage if ignored.
E-4 Handling Precautions •B e sure to press the O ke y before using the calculator f or the first time. •E ven if the calculator is operating normally , replace the battery at least once every three years. A dead battery can leak, causing damage to and malfunction of the calculator .
E-5 Befor e Using the Calculator k Removing the Har d Case Bef ore using the calculator, slide its hard case do wnwards to remov e it, and then affix the hard case to the bac k of the calculator as shown in the illustration below . k T urning P ower On and Off •P ress O to turn on the calculator.
E-6 k About the Display Y our calculator has a 31-dot × 96-dot LCD screen. Example: k Display Indicator s Sample Display: This Means this: indicator: The keypad has been shifted b y pressing the 1 ke y. The ke ypad will unshift and this indicator will disappear when you press a k ey .
E-7 Important! •F or a very complex calculation or some other type of calculation that takes a long time to e xecute, the displa y ma y show only the abov e indicators (without any value) while it perf orms the calculation internally .
E-8 •S ee “Adjusting Displa y Contrast” f or information about how to use “ ] CONT ' ”. Specifying the Input/Output Format For this input/output format: P erf orm this key operation: Ma.
E-9 •N orm: Selecting one of the tw o availab le settings (Nor m1, Norm2) determines the range in which results will be display ed in non- e xponential format.
E-10 k Initializing the Calculation Mode and Other Settings P erf or ming the follo wing procedure initializes the calculation mode and other setup settings as shown belo w .
E-11 Example: sin 30 = LINE s 30)= Pressing s inputs “sin(”. •N ote that the input procedure is different if y ou want to use Math fo rm at. For more inf ormation, see “Inputting with Math Format”. Omitting the Multiplication Sign Y ou can omit the multiplication sign ( × ) in any of the f ollowing cases .
E-12 •N ormally the input cursor appears as a straight ver tical ( I ) or horizontal ( ) flashing line on the displa y screen. When there are 10 or fe wer bytes of input remaining in the current e xpression, the cursor changes shape to I to let you know .
E-13 Deleting a Character or Function Example: To correct the expression 369 × × 12 so it becomes 369 × 12 LINE Inser t Mode: 369**12 dd Y Ov erwrite Mode: 369**12 ddd Y Correcting a Calculation Ex.
E-14 k Displaying the Location of an Err or If an error message (lik e “Math ERROR” or “Syntax ERR OR”) appears when you press = , press d or e . This will display the part of the calculation where the error occurred, with the cursor positioned at the error location.
E-15 Functions and Symbols Supported for Math Format Input • The “Bytes” column shows the n umber of bytes of memory that are used up by input. Function/Symbol Ke y Operation Bytes Improper F ra.
E-16 Example 3: To input (1 + ) 2 × 2 = MA TH (1+ ' 2 c 5 e ) Math w *2= •W hen you press = and obtain a calculation result using Math fo rm at, par t of the expression y ou input can be cut off as shown in the Example 3 screen shot. If you need to vie w the entire input e xpression again, press A and then press e .
E-17 Original Expression: Function Ke y Operation Resulting Expression Integral 7 Derivative 1 7 ( F ) Σ Calculation 1 & ( 8 ) Y ou can also incor porate v alues into the following functions. 1l ( $ ), 1i ( % ), ! , 6 , 1 ! ( # ), 1w (Abs) Displaying Calculation Results in a Form that Includes ' ' ' ' ' 2, π , etc.
E-18 Example 2: sin (60) = (Angle Unit: Deg) MA TH s 60= Math Example 3: sin –1 (0.5) = π (Angle Unit: Rad) MA TH 1 s (sin –1 ) 0.5= Math • The follo wing are the calculations for which ' fo rm (form that includes ' within irrational number display) results can be display ed.
E-19 The follo wing shows the range f or each of the coefficients ( a , b , c , d , e , f ). 1 < a < 100, 1 < b < 1000, 1 < c < 100 0 < d < 100, 0 < e < 1000, 1 < f < 100 Example: The underlined areas in the abov e examples indicate what caused decimal f or m to be used.
E-20 • If a term is encountered during the calculation cannot be displayed as a root ( ' ) form or a fraction, the calculation result is displa yed in decimal f or m. Example: log3 + ' 2 = 1.891334817 Basic Calculations (COMP) This section e xplains how to perform arithmetic, fraction, percent, and sexagesimal calculations .
E-21 Omitting a Final Closed P arenthesis Y ou can omit any closed parenthesis ( ) ) immediately preceding operation of the = ke y at the end of a calculation.
E-22 Switching between Fraction and Decimal Format • The f or mat of the fraction depends on the currently selected fraction display f ormat setting (improper fraction or mixed fraction).
E-23 Sexa gesimal Calculations •P erforming the following types of se xagesimal calculations produces a se xagesimal result. -A ddition or subtraction of two se xagesimal values -M ultiplication or .
E-24 Using Calculation History Memory and Replay Calculation history memor y maintains a record of each calculation e xpression y ou input and e xecute, and its result.
E-25 Using Calculator Memory Memory Name Description An sw er Memo ry Stores the last calculation result obtained. Calculation results can be added to or sub- Independent tracted from independent memory . The “M” Memory display indicator indicates data in independent memory .
E-26 Inputting Answer Memory Contents into an Expression Example: To perform the calculations shown below: LINE 123+456= 789- G = k Independent Memory (M) Y ou can add calculation results to or subtract results from independent memory . The “M” appears on the display when independent memory contains a value.
E-27 Calculation Examples Using Independent Memory • If the “M” indicator is on the displa y , perform the procedure under “Clearing Independent Memor y” before perf orming this example.
E-28 Using CALC The CALC feature lets y ou input a calculation e xpression that contains v ar iab les, and then assign values to the v ariables and perf or m the calculation.
E-29 s (or = ) 10= •T o exit CALC , press A . • If the expression y ou are using contains more than one variable , an input prompt appears for each one . Appendix <#016> Cal culate a n +1 = a n + 2 n (a 1 = 1) as the value of a n changes from a 2 to a 5 .
E-30 •A n error (V ariable ERR OR) occurs when the solution variable is not included in the expression being solv ed. k Example SOL VE Operation Example: To solve y = ax 2 + b for x when y = 0, a = 1, and b = –2. MA TH S f (Y) Ss (=) S y (A) S ) (X) w + S e (B) 1 ) (,) S ) (X) 1s (SOL VE) Math Prompts for input of a v alue f or Y .
E-31 • SOL VE uses Newton’ s Method, so e ven if there are multiple solutions, only one of them will be returned. •N ew ton’s Method can ha ve prob lems obtaining solutions for the f ollowing types of functions. -A per iodic function ( y = sin( x ), etc.
E-32 Function Calculations This section explains ho w to use the calculator’ s built-in functions. The functions av ailable to you depends on the calculation mode y ou are in. The e xplanations in this section are mainly about the functions that are av ailable in all calculation modes.
E-33 k Con verting an Input V alue to the Calculator’ s Default Angle Unit After inputting a value , press 1G (DRG ' ) to displa y the angle unit specification menu shown belo w . Press the number ke y that corresponds to the angle unit of the input value .
E-34 Appendix <#023> to <#025> *1 A base of 10 (common logarithm) is used if no base is specified. k Po wer Functions and P ower Root Functions •P ower functions and power root functions can be used in the COMP , ST A T , EQN, MA TRIX, T ABLE, and VECTOR calculation modes .
E-35 Tips on Impr oving Integration V alue Accuracy •W hen a periodic function or integration interval results in positive and negative f ( x ) function values P erf or m separate integrations f or each cycle, or f or the positive part and the negative par t, and then combine the results.
E-36 k Differential Calculations Y our calculator performs differential calculations b y approximating the derivativ e based on centered difference appro ximation. d / dx ( f ( x ), a , tol ) f ( x ): Function of X (All non-X v ariables are treated as constants.
E-37 k Σ Calculations With Σ (, you can obtain the sum of an input f ( x ) e xpression for a specific range . Σ calculations are perf ormed using the follo wing for m ula. Σ ( f ( x ), a , b ) = f ( a ) + f ( a + 1) + .... + f ( b ) f ( x ): Function of X (All non-X v ariables are treated as constants.
E-38 • If you perf or m coordinate con version inside of an e xpression instead of a stand-alone operation, the calculation is performed using only the first value (either the r -v alue or the X-value) produced b y the conv ersion.
E-39 Rounding Function (Rnd) This function rounds the value or the result of the e xpression in the function’ s argument to the number of significant digits specified by the number of displa y digits setting. Display Digits Setting: Norm1 or Nor m2 The mantissa is rounded to 10 digits.
E-40 (Check rounded result.) *14= FIX k Practical Examples Appendix <#042> ∫ (sin X + cos X ) 2 dX = π 0 π ( tol : Not specified) <#043> Confirm that the two sides of the f ollowing eq.
E-41 Note •W hen you transf or m from decimal f orm to standard form, the calculator automatically decides the standard form to use. Y ou cannot specify the standard form. Fr action: The current fraction displa y format setting determines whether the result is an improper fraction or mixed fraction.
E-42 Complex Number Calculations (CMPLX) Y our calculator can perform the following comple x number calculations. •A ddition, subtraction, multiplication, division •A rgument and absolute value ca.
E-43 •W ith Linear f or mat, the real par t and imaginary par t are shown in two diff erent lines. Example 2: ' 2 ∠ 45 = 1 + i (Angle Unit: Deg) MA TH ! 2 e 1 y ( ∠ ) 45= Math CMPLX Example.
E-44 k Absolute V alue and Argument (Abs, arg) Y ou can use the following procedure to obtain the absolute v alue (|Z|) and argument (arg) on the Gaussian plane f or a complex n umber of the f or mat Z = a + b i . 1w (Abs); 1 2 (CMPLX) 1 (arg) Appendix <#051> Obtain the absolute value and argument of 2 + 2 i .
E-45 ST A T Editor Screen There are two ST A T editor screen formats, depending on the type of statistical calculation you selected. Single-variable Statistics Paired-v ariable Statistics • The first line of the ST A T editor screen shows the value for the first sample or the values f or their first pair of samples.
E-46 ST A T Editor Screen Input Precautions • The number of lines in ST A T editor screen (the number of sample data values y ou can input) depends on the type of statistical data y ou selected, and on the Statistical Display setting of the calculator’ s setup screen.
E-47 Deleting All ST A T Editor Contents (1) Press 1 1 (ST A T) 3 (Edit). (2) Press 2 (Del-A). • This clears all of the sample data on the ST A T editor screen. Note •N ote that you can perf orm the procedures under “Inser ting a Line” and “Deleting All ST A T Editor Contents” only when the ST A T editor screen is on the display .
E-48 Single-variab le Menu Item Select this When you want to do this: menu item: Displa y the Distr sub-menu of commands for normal distr ibution calculations 7 Distr •F or more information, see “Distr Sub-men u”.
E-49 Distr Sub-menu ( 1 1 (ST A T) 7 (Distr)) 1 P( 2 Q( 3 R( 4 ' t This menu can be used to calculate the probability of standard normal distribution.
E-50 Commands when Linear Regression Calculation (A+BX) Is Selected With linear regression, reg ression is performed in accordance with the f ollowing model equation.
E-51 Reg Sub-menu ( 1 1 (ST A T) 7 (Reg)) Select this When you want to obtain this: menu item: 1 AR egression coefficient constant term A 2 BR egression coefficient B 3 r Correlation coefficient r 4 m.
E-52 Comments f or Other T ypes of Regression F or details about the calculation f or mula of the command included in each regression type, ref er to the indicated calculation f ormulas ( Appendix <#069> to <#073>).
E-53 k Number Base Setting and V alue Input Use the ke ys listed below to specify the number base. The ke y markings used in this section are the ones that are above each ke y , on the right.
E-54 Specifying the Base during Input The BASE-N Mode lets you o verride the current default n umber base setting and input a particular value using a different base. When inputting the value , press 1 3 (BASE) c to display page two of the BASE menu, and then press the number k ey that corresponds to the base you w ant to specify .
E-55 Press this key: When you want to input this: 5 (Not) “Not(” function, which returns the result of a bitwise complement 6 (Neg) “Neg(” function, which retur ns the result of a two’ s com.
E-56 k Inputting Coefficients Use the coefficient editor screen to input the coefficients of an equation. The coefficient editor screen shows input cells f or each of the coefficients required by the currently selected equation type .
E-57 • In the case of simultaneous linear equations, y ou can use f and c to s witch the display between the solutions f or X and Y (and Z). •W hen there are multiple solutions f or a quadratic or cubic equation, y ou can use the f and c ke ys to scroll the displa y between X 1 , X 2 , and X 3 .
E-58 (3 )P ress a number ke y ( 1 through 6 ) to specify the matr ix dimension you want to use . •P ressing a number key to specify the matrix dimension causes the matrix editor screen to appear. (4) Use the matr ix editor screen to input each of the elements into the matrix.
E-59 •Y ou cannot edit the contents of a cell. •T o switch to the matrix calculation screen, press A . •W hile the MatAns screen is on the display , you can press an arithmetic operator key (lik e + or - ) and use the screen contents in a subsequent calculation, just as with Answ er Memor y contents.
E-60 <#104> Obtain the absolute value (Abs(MatB)) of each element of Matrix B. •U se 1w (Abs). <#105> Determine the square (MatA 2 ) or cube (MatA 3 ) of Matrix A. •U se w to specify squar ing, and 1 w ( x 3 ) to specify cubing. Note that y ou cannot use 6 f or this input.
E-61 (4) After specifying the star t value, press = . • This displa ys the end value input screen. •S pecify the end value. (5) After specifying the end value, press = .
E-62 Note •C ertain functions and Star t, End, Step value combinations can cause number table gener ation to take a long time. k Number T able Screen The number tab le screen shows x -values calculated using the specified Start, End, and Step values, as well as the v alues obtained when each x -value is substituted in the function f ( x ).
E-63 (4) Use the vector editor screen to input each element. •I nput is subject to the same r ules as those that gov ern the coefficient editor screen in the EQN Mode. F or more information, see “Rules for Inputting and Editing Coefficients”. • If you want to create another v ector , repeat this procedure from step (1).
E-64 Appendix <#106> Store VctA = (1, 2) and VctC = (2, –1, 2). <#107> Copy VctA = (1, 2) to VctB and then edit V ector B to VctB = (3, 4). • The follo wing examples use the v ectors input in Examples <#106> and <#107> (VctA, VctB, VctC).
E-65 •T he values are based on ISO Standards (1992) and CODA T A Recommended V alues (1998). For details, see Appendix <#114>. Appendix <#115> and <#116> P erf or m all of these examples in the COMP Mode ( N 1 ).
E-66 3. F ractions: a b / c 4. Prefix symbol: (–) (negative sign) d, h, b , o (base n symbol) 5. Metric conversion commands: cm ' in, etc. Statistical estimated value calculation: m , n , m 1 , m 2 6. P ermutations, combinations: n P r , n C r Complex polar f orm symbol: ∠ 7.
E-67 A Stack ERR OR occurs when the calculation you are perf orming causes the capacity of either stac k to be exceeded. Stack Issues to K eep in Mind for Each Mode •I n the CMPLX Mode, each input value uses two le vels of the numeric stack, regardless of whether the input v alue is a real number or a complex number .
E-68 Functions Input Range tanh x 0 x 9.999999999 10 99 tanh – 1 x 0 x 9.999999999 10 –1 log x /ln x 0 x 9.999999999 10 99 10 x –9.999999999 10 99 x 99.99999999 e x –9.999999999 10 99 x 230.
E-69 k Error Messa g es The calculator will displa y an error message when a result exceeds the calculation r ange, when y ou attempt an illegal input, or whenev er any other similar problem occurs. When an error messa ge appears... The follo wing are general operations you can use when an y error message appears.
E-70 • Action •M a k e necessar y corrections. Dimension ERR OR (MA TRIX and VECT OR Modes only) • Cause • The matrix or vector you are trying to use in a calculation was input without specifying its dimension. •Y ou are trying to perform a calculation with matrices or vectors whose dimensions do not allow that type of calculation.
E-71 k Before assuming malfunction of the calculator ... Pe rform the following steps whene v er an error occurs during a calculation or when calculation results are not what you e xpected. If one step does not correct the problem, mo ve on to the next step .
E-72 1 Press 1A (OFF) to tur n off the calculator . •T o ensure that you do not accidentally turn on power while replacing the batter y , slide the hard case onto the front of the calculator . 2 On the back of the calculator , remov e the screw and the battery cover .
CASIO COMPUTER CO. , L TD . 6-2, Hon-machi 1-chome Shibuya-ku, Tokyo 151-8543, Japan SA0411-B Printed in China.
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Casio fx-991ESを既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はCasio fx-991ESの不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
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