Casio CFX-9850G PLUS Document technique

Appendix

Appendix A Resetting the Calculator

Appendix B Power Supply

Appendix C Error Message Table

Appendix D Input Ranges

Appendix E Specifications

430

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.

uTo reset the calculator

1. Highlight the MEM icon on the main menu and then press w, or press t.

2. Use cto move the highlighting down to “Reset” and then press w.

123456

3. Press 1(YES) to reset the calculator or 6(NO) to abort the operation

without resetting anything.

4. Press m.

P. 11 •If the display appears to dark or dim after you reset the calculator, adjust the

contrast.

431

•If the calculator stops operating correctly for

some reason, use a thin, pointed object to

press the P button on the back of the

calculator. This should make the RESET

screen appear on the display. Perform the

procedure to complete the RESET operation.

•Pressing the P button while an internal calculation is being performed will

cause all data in memory to be deleted.

Resetting the Calculator Appendix A

P button

432

Appendix B Power Supply

This calculator is powered by four 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 turn off the calculator

and replace batteries.

If you try to continue using the calculator, it will automatically turn off in order to

protect memory contents. You will not be able to turn 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.

The batteries that come with this calculator discharge slightly during shipment and

storage. Because of this, they may require replacement sooner than the normal

expected battery life.

Warning!

All memory contents will be deleted if you remove both the main power supply

and the memory back up batteries at the same time. If you ever remove both

batteries, correctly reload them and then perform the reset operation.

kReplacing Batteries

Precautions:

Incorrectly using batteries can cause them to burst or leak, possibly damaging the

interior of the calculator. 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 calculator for long periods.

•Never try to recharge the batteries

supplied with the calculator.

•Do not expose batteries to direct heat, let them become shorted, or try to take

them apart.

433

Power Supply Appendix B

(Should a battery leak, clean out the battery compartment of the calculator

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.

uTo replace the main power supply batteries

*Never remove the main power supply and the memory back up batteries

from the calculator at the same time.

*Never turn on the calculator while the main power supply batteries are

removed 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 four batteries with new ones.

1. Press !O to turn off the calculator.

Warning!

*Besure to turn the calculator off before replacing batteries. Replacing

batteries with power on will cause data in memory to be deleted.

2. Making sure that you do not accidently press the okey, attach the case to

the calculator and then turn it over.

3. Remove the back cover from the calculator by

pulling with your finger at the point marked 1.

4. Remove the four old batteries.

5. Load a new set of four batteries, making sure that

their positive (+) and negative (–) ends are facing in

the proper directions.

6. Replace the back cover.

7. Turn the calculator front side up and remove its case.

Next, press oto turn on power.

BACK UP

434

Appendix B Power Supply

•Power supplied by memory back up battery while the main power supply

batteries are removed for replacement retains memory contents.

•Do not leave the calculator without main power supply batteries loaded for long

periods. Doing so can cause deletion of data stored in memory.

•If the figures on the display appear too light and hard to see after you turn on

power, adjust the contrast.

uTo replace the memory back up battery

*Before replacing the memory back up battery, turn on the calculator 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 calculator at the same time.

*Be sure to replace the back up power supply battery at least once 2 years,

regardless of how much you use the calculator during that time. Failure to do

so can cause data in memory to be deleted.

1. Press !O to turn off the calculator.

Warning!

*Besure to turn the calculator off before replacing batteries. Replacing

batteries with power on will cause data in memory to be deleted.

2. Making sure that you do not accidently press the okey, attach the case to

the calculator and then turn it over.

3. Remove the back cover from the calculator by

pulling with your finger at the point marked 1.

4. Remove screw ion the back of the calculator, and

remove the back up battery compartment cover.

5. Insert a thin, pointed non-metal object

(such as a toothpick) into the hole maked j

and remove the old battery.

BACK UP

435

Power Supply Appendix B

6. 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.

7. Install the memory protection battery cover onto the

calculator and secure it in place with the screw.

Next, replace the back cover.

8. Turn the calculator front side up and remove its case. Next, press oto turn

on power.

kAbout the Auto Power Off Function

Calculator power turns off automatically if you do not perform any key operation

for about 6 minutes. To restore power, press o.

BACK UP

436

Meaning

1Calculation formula contains an

error.

2Formula in a program contains

an error.

1Calculation result exceeds

calculation range.

2Calculation is outside the input

range of a function.

3Illogical operation (division by

zero, etc.)

4Poor precision in ∑calculation

results.

5Poor precision in differential

calculation results.

6Poor precision in integration

calculation results.

7Cannot find results of equation

calculations.

1No corresponding Lbl nfor

Goto n.

2No program stored in program

area Prog ”file name”.

•Nesting of subroutines by Prog

”file name” exceeds 10 levels.

Message

Syn ERROR

Ma ERROR

Go ERROR

Ne ERROR

Countermeasure

1Use dor eto display the

point where the error was

generated and correct it.

2Use dor eto display the point

where the error was generated

and then correct the program.

1234

Check the input numeric value

and correct it.

When using memories, check

that the numeric values stored

in memories are correct.

5Try using a smaller value for Ax

(xincrement/decrement).

6Try changing the tolerance “tol”

when using Gauss-Kronrod

Rule or the number of divisions

“n” when using Simpson's Rule

to another value.

7Check the coefficients of the

equation.

1Correctly input a Lbl nto corres-

pond to the Goto n, or delete

the Goto nif not required.

2Store a program in program

area Prog ”file name”, or delete

the Prog ”file name” if not

required.

•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.

Appendix C Error Message Table

Meaning

•Execution of calculations that

exceed the capacity of the

stack for numeric values or

stack for commands.

•Not enough memory to input a

function into function memory.

•Not enough memory to create a

matrix using the specified

dimension.

•Not enough memory to hold

matrix calculation result.

•Not enough memory to store

data in list function.

•Not enough memory to input

coefficient for equation.

•Not enough memory to hold

equation calculation result.

•Not enough memory to hold

function input in the Graph

Mode for graph drawing.

•Not enough memory to hold

function input in the DYNA

Mode for graph drawing.

•Not enough memory to hold

function or recursion input.

•Incorrect argument specification

for a command that requires an

argument.

•Illegal dimension or list used

during matrix calculations.

•Problem with cable connection

or parameter setting during

program data communications.

•Problem with cable connection

or parameter setting during

data communications.

•Problem with cable connection

or parameter setting during

data communications.

•Memory of receiving unit

became full during program

data communications.

Message

Stk ERROR

Mem ERROR

Arg ERROR

Dim ERROR

Com ERROR

Transmit

ERROR!

Receive

ERROR!

Memory Full!

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.

•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.

•Correct the argument.

•Lbl n, Goto n: n= integer from

0 through 9.

•Check matrix or list dimension.

•Check cable connection.

•Delete some data stored in the

receiving unit and try again.

437

Error Message Table Appendix C

438

Function

sinx

cosx

tanx

sin–1x

cos–1x

tan–1x

sinhx

coshx

tanhx

sinh–1x

cosh–1x

tanh–1x

logx

Inx

10x

1/x

nPr

nCr

Pol (x, y)

Accuracy

As a rule,

accuracy is

±1 at the

10th digit.*

Notes

However, for tanx:

|x|

90(2n+1):DEG

|x|

π/2(2n+1):RAD

|x|

100(2n+1):GRA

Input ranges

(DEG) |x| < 9 ×(109)°

(RAD) |x| < 5 ×107πrad

(GRA) |x| < 1 ×1010grad

|x| <1

|x| < 1 ×10100

|x| <230.2585092

|x| < 1 ×10100

|x| < 5 ×1099

1<x< 5 ×1099

|x| < 1

1 ×10–99 <x< 1 ×10100

–1 ×10100 < x< 100

–1 ×10100

< x<230.2585092

0 <x< 1 ×10100

|x| <1 ×1050

|x| < 1 ×10100, x

|x| < 1 ×10100

0 <x<69

(xis an integer)

Result < 1 ×10100

n, r(nand rare integers)

0 <r<n,

n< 1 ×1010

< 1 ×10100

x2+ y2

Appendix D Input Ranges

Internal

digits

15 digits

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