Casio CFX-9970G Technisches Dokument

Appendix

Appendix A Resetting the Calculator

Appendix B Power Supply

Appendix C Error Message Table

Appendix D Input Ranges

Appendix E Specifications

444

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 SYS 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 tint.

445

• If the calculator stops operating correctly for some

P button

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

446

Appendix B Power Supply

This unit is powered by fourAAA-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 turn power 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.

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.

kReplacing 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.

(Should a battery leak, clean out the battery compartment of the unit immedi-

ately, taking care to avoid letting the battery fluid come into direct contact with

your skin.)

447

Power Supply Appendix B

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 unit at the same time.

* Never turn 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 four batteries with new ones.

1. Press !O to turn the calculator off.

Warning!

* Be sure to turn the unit 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, slide the case onto

the calculator and then turn the calculator over.

3. Slide the back cover from the unit 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 slide off its case.

Next, press oto turn on power.

BACK UPBACK UP

MAINMAIN

MAIMAI

448

BACK UPBACK UP

MAINMAIN

MAIMAI

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 unit 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 tint.

uTo replace the memory back up battery

* Before replacing the memory back up battery, turn 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 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.

Warning!

* Be sure to turn the unit 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, slide the case onto

the calculator and then turn the calculator over.

3. Slide the back cover from the unit 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

tooth pick) into the hole marked jand remove the

old battery.

449

BACK UPBACK UP

MAINMAIN

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 slide off its case. Next, press oto turn

on power.

kAbout the Auto Power Off Function

The calculator turns power off automatically if you do not perform any key

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

450

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.

8Attempt to use approx with an

expression that generates an

error unique to the ALGBR Mode.

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.

8Change the input expression.

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 subrou-

tines 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.

451

Error Message Table Appendix C

Meaning

• No solution exists for the

operation being performed in

the ALGBR Mode.

• The result of the operation

being performed in the ALGBR

Mode exceeds the range of the

calculator.

• An input value in the ALGBR

Mode is outside the domain of

the operation being performed.

• In the ALGBR Mode, only real

numbers have been input and

the result is a complex number

while the set up screen's

Answer Type item is specified

as "Real".

• No solution can be obtained in

the ALGBR Mode using the

Solve function.

Countermeasure

• Change the input expression.

1Change the setting of Answer

Type to "Cplx".

2Change the input expression.

1Change the setting of Answer

Type to "Cplx".

2Change the input expression.

452

Message

Undefined

Overflow ERROR

Domain ERROR

Non-Real

ERROR

No Solution

Appendix C Error Message Table

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