Appendix

Appendix A Appendix B Appendix C Appendix D Appendix E Appendix F Resetting the Calculator Power Supply Error Message Table Input Ranges 2-byte Code Table Specifications
Appendix A Resetting the Calculator
Warning! The procedure described here clears all memory contents. Never perform this operation unless you want to totally clear the memory of the calculator. If you need the data currently stored in memory, be sure to write it down somewhere before performing the RESET operation.
u To reset the calculator
1. Press m to display the main menu.
2. Highlight the MEM icon and press w, or press i.
3. Use c to move the highlighting down to Reset and then press w.
4. Press 1 (YES) to reset the calculator or 4 (NO) to abort the operation without resetting anything.
If the display appears to dark or dim after you reset the calculator, adjust contrast.
Resetting the calculator initializes it to the following settings. Item Icon Angle Unit Exponent Display Range Fraction Reduction Mixed Fraction Graph Type Statistical Graph Variable Memory Answer Memory (Ans) Graphic Display/Text Display View Window View Window Memory Graph Function Enlargement/Reduction Factor Table & Graph Data List Data Statistical Calculation/Graph Memory Program Input Buffer/AC Replay Initial Setting RUN Rad Norm 1 Automatic Display Rectangular coordinate (Y=) Automatic Clear Clear Clear Clear (initialized) Clear Clear Clear (initialized) Clear Clear Clear Clear Clear
Performing the RESET operation while an internal calculation is being performed will cause all data in memory to be deleted. Make sure that no calculation be being performed before starting a RESET operation. If the calculator stops operating correctly for some reason, use a thin, pointed object to press the RESET button on the back of the calculator. This should make the RESET confirmation screen appear on the display. Perform the procedure to complete the RESET operation.

RESET button

Appendix B

Power Supply

This unit is powered by two AAA-size (LR03 (AM4) or R03 (UM-4)) batteries. In addition, it uses a single CR2032 lithium battery as a back up power supply for the memory. If the following message appears on the display, immediately stop using the calculator and replace batteries.
If you try to continue using the calculator, it will automatically switch power off, in order to protect memory contents. You will not be able to switch power back on until you replace batteries. Be sure to replace the main batteries at least once every two years, no matter how much you use the calculator during that time. Warning! If you remove both the main power supply and the memory back up batteries at the same time, all memory contents will be erased. If you do remove both batteries, correctly reload them and then perform the reset operation. The batteries that come installed in this unit when you purchase it are for factory test purposes, so they will probably not provide normal service life.

k Replacing Batteries

Precautions: Incorrectly using batteries can cause them to burst or leak, possibly damaging the interior of the unit. Note the following precautions: Be sure that the positive (+) and negative () poles of each battery are facing in the proper directions. Never mix batteries of different types. Never mix old batteries and new ones. Never leave dead batteries in the battery compartment. Remove the batteries if you do not plan to use the unit for long periods. Never try to recharge the batteries supplied with the unit. Do not expose batteries to direct heat, let them become shorted, or try to take them apart. 172

(Should a battery leak, clean out the battery compartment of the unit immediately, taking care to avoid letting the battery fluid come into direct contact with your skin.) Keep batteries out of the reach of small children. If swallowed, consult with a physician immediately.
u To replace the main power supply batteries
* Never remove the main power supply and the memory back up batteries from the unit at the same time. * Be sure to switch the unit off before replacing batteries. Replacing batteries with power on will cause data in memory to be deleted. * Never replace the main power supply battery compartment cover or switch the calculator on while the main power supply batteries are removed from the calculator or not loaded correctly. Doing so can cause memory data to be deleted and malfunction of the calculator. If mishandling of batteries causes such problems, correctly load batteries and then perform the RESET operation to resume normal operation. * Be sure to replace all two batteries with new ones. 1. Press !O to turn the calculator off. 2. Push the battery compartment cover on the back of the calculator in the direction noted in the illustration and remove it. 3. Remove the two old batteries. 4. Load a new set of two batteries, making sure that their positive (+) and negative () ends are facing in the proper directions. 5. Replace the battery compartment cover and press o to turn power on. The memory backup battery provides power to the memory while the main batteries are removed, so memory data is not lost. Power will not switch on if you press o while the main power supply battery compartment cover is open. Do not leave the unit without main power supply batteries loaded for long periods. Doing so can cause deletion of data stored in memory. P.11 If the figures on the display appear too light and hard to see after you turn on power, adjust the contrast.
u To replace the memory back up battery
* Before replacing the memory back up battery, switch on the unit and check to see if the Low battery! message appears on the display. If it does, replace the main power supply batteries before replacing the back up power supply battery. * Never remove the main power supply and the memory back up batteries from the unit at the same time. * Be sure to switch the unit off before replacing batteries. Replacing batteries with power on will cause data in memory to be deleted. * Be sure to replace the back up power supply battery at least once 2 years, regardless of how much you use the unit during that time. Failure to do so can cause data in memory to be deleted. 1. Press !O to turn the calculator off. 2. Push the battery compartment cover on the back of the calculator in the direction noted in the illustration and remove it. 3. Remove screw i on the back of the calculator, and remove the back up battery holder. 4. Remove the old battery. 5. Wipe off the surfaces of a new battery with a soft, dry cloth. Load it into the calculator so that its positive (+) side is facing up. 6. Pressing down on the battery with the battery holder, replace the screw that secures the holder in place. 7. Replace the battery compartment cover and press o to turn power on. The main battery provides power to the memory while the backup batteries are removed, so memory data is not lost.

k About the Auto Power Off Function
The calculator switches power off automatically if you do not perform any key operation for about 6 minutes. To restore power, press o. The calculator automatically turns off it is left for about 60 minutes with a calculation stopped by an output command (^), which is indicated by the Disp message on the display.
Appendix C Error Message Table
Message Syn ERROR Meaning 1 Calculation formula contains an error. 2 Formula in a program contains an error. Countermeasure 1 Use d or e to display the point where the error was generated and correct it. 2 Use d or e to display the point where the error was generated and then correct the program.

Ma ERROR

1 Calculation result exceeds calculation range. 2 Calculation is outside the input range of a function. 3 Illogical operation (division by zero, etc.) 4 Poor precision in differential calculation results.
123 Check the input numeric value and correct it. When using memories, check that the numeric values stored in memories are correct. 4 Try using a smaller value for x ( x increment/decrement).

Go ERROR

1 No corresponding Lbl n for Goto n. 2 No program stored in program area Prog file name.
3 No corresponding Next for For, no corresponding LpWhile for Do, or no corresponding WhileEnd for While.
1 Correctly input a Lbl n to correspond to the Goto n , or delete the Goto n if not required. 2 Store a program in program area Prog file name, or delete the Prog file name if not required. 3 Correctly match Next with For, LpWhile with Do, or WhileEnd with While.

Ne ERROR

Nesting of subroutines exceeds 10 levels.
Ensure that Prog file name is not used to return from subroutines to main routine. If used, delete any unnecessary Prog file name. Trace the subroutine jump destinations and ensure that no jumps are made back to the original program area. Ensure that returns are made correctly.
Message Stk ERROR Meaning Execution of calculations that exceed the capacity of the stack for numeric values or stack for commands. Countermeasure Simplify the formulas to keep stacks within 10 levels for the numeric values and 26 levels for the commands. Divide the formula into two or more parts.

Mem ERROR

1 Not enough memory to hold function input in the Graph Mode for graph drawing. 2 Not enough memory to hold function input in the TABLE Mode. 3 Not enough memory to store data in list function.
123 Keep the number of variables you use for the operation within the number of variables currently available. Simplify the data you are trying to store to keep it within the available memory capacity. Delete no longer needed data to make room for the new data.

Arg ERROR

Incorrect argument specification for a command that requires an argument.

Correct the argument. Fix n, Sci n : n = integer from 0 through 9. Lbl n , Goto n : n = integer from 0 through 9.

Dim ERROR

Illegal dimension used during list calculations.

Check list dimension.

Appendix D
Function sinx cosx tanx sin 1x cos1x tan 1x logx Inx 10x ex

Input Ranges

Input ranges Internal digits Accuracy As a rule, accuracy is 1 at the 10th digit. Notes However, for tanx: |x| G 90(2n+1):DEG |x| G /2(2n+1):RAD |x| G 100(2n+1):GRA
(DEG) |x| < (RAD) |x| < rad (GRA) |x| < grad

15 digits

|x| < 1 " |x| < 1099 < x < < x < 10100 < x < 230.< x < " " |x| <|x| < 100, x G 0 " " |x| < < x < 69 (x is an integer) Result < 100 n, r (n and r are integers) 0 < r < n, n < " " " " "

"

nPr nCr

Pol ( x, y)

x2 + y2 < 100
|r| < 100 (DEG) | | < 9 (RAD) | | < 7 rad (GRA) | | < grad
" However, for tan : | | G 90(2 n+1):DEG | | G /2(2n+1):RAD | | G 100(2n+1):GRA

Rec (r ,)

Function Input ranges |a|, b, c < 0 < b, c |x| < 100 Sexagesimal display: |x| < 10100 < y log x < 100 x=0:y>0 x<0: 1 y = n, (n is an integer) 2n+1 However; 10100 < log |x| < digits Internal digits Accuracy Notes
As a rule, accuracy is 1 at the 10th digit.

x > 0:

^(x y)
10100 < logy < 100 x y=0:x>y < 0 : x = 2n +1, n (n G 0, n is an integer) However; 10100 < log |y| < 100

y>0:xG0

Total of integer, numerator and denominator must be within 10 digits (includes division marks). |x| < 50 |y| < 50 |n| < 100 xn, yn, x, y, a, b, c, r :

xn , yn : n G 0, 1

* Errors may be cumulative with internal continuous calculations such as ^ (xy), x y, x!, 3 x, sometimes affecting accuracy.
Appendix E 2-byte Command Table
Spaces in the following commands are indicated by ].
OPTN menu commands d/dx(, Max(, Min(, Mean(, Median(, Seq(, Dim, Fill(, Sum, List VARS menu commands
Y, Xt, Yt, Xmin, Xmax, Xscl, Ymin, Ymax, Yscl, Tmin, Tmax, Tptch, Xfct, Yfct, Q1 , Q3 , x1, y1, x2, y2 , x3, y3, F]Start, F]End, F]pitch, c

Commands available with the W key
If, Then, Else, IfEnd, For, To, Step, Next, While, WhileEnd, Do, LpWhile, Return, Break, Stop, ClrText, ClrGraph, ClrList, DrawGraph, DrawStat, DrawTG-Con, DrawTG-Plt, DispTable
Commands available with the 3 (MENU) key in the PRGM Mode
1-Variable, 2-Variable, LinearReg, Med-MedLine, QuadReg, LogReg, ExpReg, PowerReg, S-Gph1, S-Gph2, S-Gph3, Square, Cross, Dot, Scatter, xy Line, Hist, MedBox, N-Dist, Linear, Med-Med, Quad, Log, Exp, Power, Y=Type, ParamType, Y>Type, Y<Type, Y>Type, Y<Type, SortA(, SortD(, G]SelOn, G]SelOff, T]SelOn, T]SelOff, DrawOn, DrawOff, List1, List2, List3, List4, List5, List6
Commands available with the Z key in the PRGM Mode
S-WindAuto, S-WindMan, G-Connect, G-Plot, VarRange, VarList1, VarList2, VarList3, VarList4, VarList5, VarList6
Commands available with the ! key
StoV-Win, RclV-Win, Vertical, Horizontal
Appendix F Specifications

Model: fx-7400G

Calculations / Graph Function
Basic calculation functions: Negative numbers; exponents; parenthetical addition, subtraction, multiplication, division (with priority sequence judgement function - true algebraic logic) Built-in scientific functions: Trigonometric/inverse trigonometric functions (angle units: degrees, radians, grads); logarithmic/exponential functions; reciprocals, factorials; square roots; cube roots; powers; roots; squares; negative signing; exponential notation input; , parenthetical calculations; internal rounding; random numbers; angle unit specification; fractions; decimal-sexagesimal conversion; coordinate transformation; permutation; combination; number of decimal place and significant digit specification Built-in functions: Exponential notation range; delete, insert, answer functions; replay; memory status display (bytes used/unused); multistatements; output command input Fraction Reduction: Automatic, Step-by-Step Differentials: Extraction of derivative using differential from center point List calculations: Data sorting (ascending, descending); maximum value; minimum value; average, median; sum; numeric sequence generation Variables: 26 Calculation range: to 9.and 0. Internal operations use 15-digit mantissa. Exponential display range: Norm 1: 102 > | x|, |x| > 1010 Norm 2: 109 > |x|, |x| > Rounding: Performed according to the number of specified significant digits and decimal places. Built-in function graphs (rectangular coordinate) : sin, cos, tan, sin1 , cos1, tan1 , log, In, 10x, ex, x2, ,3 , x1

Graph Types: Rectangular coordinate: Parametric: Inequality: Graph Function Memory: Graph function storage, editing, selection, drawing Graph Functions: View Window parameter setting; trace; scroll; overwrite; list graph; zoom [box, factor (zoom in, zoom out, original size)]; sketch [plot; line; horizontal/vertical lining]; manual graphing; clear screen; View Window memory; graph function display; simultaneous drawing of multiple graphs Table & Graph: Input/editing of function (up to 10 can be input); numeric table generation; graph drawing; numeric table delete, insert, add Statistics: Standard deviation: number of data; mean; standard deviation (two types); sum; sum of squares; statistical calculations (mode, median, maximum, minimum, first quartile point, third quartile point); normal probability distribution; single-variable statistical graphs (histogram bar graph; box graph for median; normal distribution curve) Regression: number of data; mean of x ; mean of y ; standard deviation of x (two types); standard deviation of y (two types); sum of x; sum of y; sum of squares of x; sum of squares of y; sum of squares of x and y; constant term; regression coefficient; correlation coefficient; Med-Med calculations; regression graphs (linear regression graph; Med-Med graph; quadratic regression graph; logarithmic regression graph; exponential regression graph; power regression graph) Data Plot: Scatter/Plot; xy line graphing
y = f ( x) (x, y) = ( f (T), g (T)) (y > f (x), y < f (x), y > f (x), y < f ( x))

Programming

Input, storage, recall, execution of programs in program area; editing and deletion of file names and program contents; recall by file name Program commands: Loop (If, For, Do, While); Control (Prog [subroutine], Stop, Return, Break); Unconditional jump (Goto, Lbl); Conditional jump (); Count jump (Isz, Dsz); Relational operators (=, G, >, <, , ); Clear (ClrText, ClrGraph, ClrList); Display (function graph, statistical graph, Table & Graph, numerical table); Input (?); Output (^); Delimiter (:) General Commands: Function graph (8); function table (2); list (2); statistical (33), set-up commands (17) Check Function: program check, debugging, etc. 181
Program capacity: 7 kbytes (max.)

General

Display system: 13-character 6-line display; 10-digit mantissa and 9-digit mantissa and 2-digit exponent when using exponential format for calculations: displays sexagesimal, fraction values Text display: Function commands, program commands, alpha characters within remaining memory capacity Error check function: Check for illegal calculations (using values greater than 10100), illegal jumps, etc. Indicates by error message display. Power supply: Main: Two AAA-size batteries (LR03 (AM4) or R03 (UM-4)) Back-up: One CR2032 lithium battery Power consumption: 0.05W Battery life Main: LR03 (AM4): Approximately 2,000 hours (continuous display of main menu) Approximately 2 years (power off) R03 (UM-4): Approximately 1,000 hours (continuous display of main menu) Approximately 2 years (power off) Back-up: Approximately 2 years Auto power off: Power is automatically turned off approximately six minutes after last operation. The calculator automatically turns off if it is left for about 60 minutes with a calculation stopped by an output command (^), which is indicated by the Disp message on the display. Ambient temperature range: 0C to 40C Dimensions: 18.9 mm (H) 77 mm (W) 158 mm (D)

/ 4" (H) 3" (W) /4" (D)
Weight: 130g (including batteries) 182
GUIDELINES LAID DOWN BY FCC RULES FOR USE OF THE UNIT IN THE U.S.A. (not applicable to other areas).
Program Mode Command List

NOTICE

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. Caution: Changes or modifications to the product not expressly approved by CASIO could void the users authority to operate the product.
[VARS]key V-WIN Xmin Xmax Xscl Ymin Ymax Yscl Tmin Tmax Tpth FACT Xfct Yfct STAT X n o x x2 xn xn-1 minX maxX Y p y y2 xy yn yn-1 minY maxY GRPH a b c r Q1 Med Q3 Mod PTS x1 y1 x2 y2 x3 y3 GRPH Y Xt Yt TABL Strt End pitch p y y2 xy y n y n-1 minY maxY a b c r Q1 Med Q3 Mod x1 y1 x2 y2 x3 y3 Xmin Xmax Xscl Ymin Ymax Yscl Tmin Tmax Tptch Xfct Yfct
MENU STAT DRAW On Off GRPH GPH1 GPH2 GPH3 Scat xy Hist Box N-Dis X Med X^2 Log Exp Pwr LIST List1 List2 List3 List4 List5 List6 MARK CALC 1VAR 2VAR X Med X^2 Log Exp Pwr LIST SRT-A SRT-D GRPH SEL On Off TYPE Y= Parm Y> Y< Y> Y< TABL On Off [OPTN]key LIST List Dim Fill Seq Min Max Mean Med Sum CALC Simp Int Rmdr d/dx STAT x^ y^ PROB X! nPr nCr Ran# NUM Abs Int Frac Rnd Intg ANGL o r g o''' Pol( Rec(

[PRGM]key COM If Then Else IEnd For To Step Next Whle WEnd Do LpW CTL Prog Rtrn Brk Stop JUMP Lbl Goto Isz Dsz ? ^ CLR Text Grph List DISP Stat Grph TABL Tabl G-Con G-Plt REL = > < > < :
DrawOn DrawOff S-Gph1_ S-Gph2_ S-Gph3_ Scatter xyLine Hist MedBox N-Dist Linear Med-Med Quad Log Exp Power List1 List2 List3 List4 List5 List6 Square Cross Dot 1-Variable_ 2-Variable_ LinearReg_ Med-MedLine_ QuadReg_ LogReg_ ExpReg_ PowerReg_ SortA( SortD(
List_ Dim_ Fill( Seq( Min( Max( Mean( Median( Sum_ Simp _Int_ _Rmdr_ d/dx( x^ y^
If_ Then_ Else_ IfEnd For_ _To_ _Step_ Next While_ WhileEnd Do LpWhile_ Prog_ Return Break Stop
n o x x2 x n x n-1 minX maxX
! P C Ran# Abs_ Int_ Frac_ Rnd Intg_ o r g

Lbl_ Goto_ Isz_ Dsz_ ? ^

ClrText ClrGraph ClrList DrawStat DrawGraph DispTable DrawTG-Con DrawTG-Plt = > < > < :

Pol( Rec(

CASIO ELECTRONICS CO., LTD. Unit 6, 1000 North Circular Road, London NW2 7JD, U.K.
Important! Please keep your manual and all information handy for future reference.
G_SelOn_ G_SelOff_ Y=Type ParamType Y>Type Y<Type Y >Type Y <Type T_SelOn_ T_SelOff_ ' " ~ * / #
Y Xt Yt F_Start F_End F_pitch
[SETUP]key Con Plot Deg Rad Gra Fix Sci Norm Auto Man Rang List1 List2 List3 List4 List5 List6
G-Connect G-Plot Deg Rad Gra Fix_ Sci_ Norm S-WindAuto S-WindMan VarRange VarList1 VarList2 VarList3 VarList4 VarList5 VarList6
[SHIFT]key ZOOM Fact V-WIN V-Win Sto Rcl SKTCH Cls GRPH Y= Parm Y> Y< Y> Y< Plot Line Vert Hztl
Factor_ ViewWindow_ StoV-Win RclV-Win Cls Graph_Y= Graph(X,Y)=( Graph_Y> Graph_Y< Graph_Y > Graph_Y < Plot_ Line Vertical_ Horizontal_

' " ~ * / #

[ALPHA]key ' " ~