GRAPHING CALCULATOR
EL-9950
QUICk START GUIdE
INTRODUCTION
This graphing calculator can handle many types of mathematical formulas and expressions
for you. It is powerful enough to process very complex formulas used in rocket science, but
yet so compact that it ts in your coat pocket. The main features of this graphing calculator
are as follows:
• Graphing Capability to help you visualize what you are working on,
• Slide Show Function to help you understand common formulas, prepare for presentations,
• Large memory capacity, with fast processing speed, and more.
We strongly recommend you read manual thoroughly. Complete user guide and support
materials available for download on our website www.sharp-calculators.com. If not,
then browse through this “Quick Start Guide”, at least. Last, but not least, congratulations on
purchasing the Graphing Calculator!
NOTICE
• The material in this manual is supplied without representation or warranty of any kind.
SHARP assumes no responsibility and shall have no liability of any kind,consequential or
otherwise, from the use of this material.
• SHARP strongly recommends that separate permanent written records be kept of all
important data. Data may be lost or altered in virtually any electronic memory product
under certain circumstances. Therefore, SHARP assumes no responsibility for data lost or
otherwise rendered unusable whether as a result of improper use, repairs, defects, battery
replacement, use after the specied battery life has expired, or any other cause.
• SHARP assumes no responsibility, directly or indirectly, for nancial losses or claims from
third persons resulting from the use of this product and any of its functions, the loss of or
alteration of stored data, etc.
• The information provided in this manual is subject to change without notice.
• Screens and keys shown in this manual may differ from the actual ones on the calculator.
• Some of the accessories and optional parts described in this manual may not be available at
the time you purchase this product.
• Some of the accessories and optional parts described in this manual may be unavailable
in some countries.
• All company and/or product names are trademarks and/or registered trademarks of their
respective holders.
Caring for Your Calculator
• Do not carry the calculator around in your back pocket, as it may break when you sit down.
The display is made of glass and is particularly fragile.
• Keep the calculator away from extreme heat such as on a car dashboard or near a heater,
and avoid exposing it to excessively humid or dusty environments.
• Since this product is not waterproof, do not use it or store it where uids, for example water,
can splash onto it. Raindrops, water spray, juice, coffee, steam, perspiration, etc. will also
cause malfunction.
• Clean with a soft, dry cloth. Do not use solvents.
• Do not use a sharp pointed object or exert too much force when pressing keys.
• Avoid excessive physical stress.
Inserting and replacing batteries
1. Open the battery cover located on the back of the calculator.
Pull down the notch, then lift the battery cover up to remove it.
• Keep batteries out of the reach of children.
• Do not allow batteries to become completely exhausted; doing so may cause the batteries
to leak, and may damage the calculator’s hardware.
• Do not throw batteries into a re or water, as this may cause them to explode.
Replacing the memory backup battery
Once every 5 years, the lithium battery will need to be replaced. The lithium battery is used to
maintain the memory of the calculator.
Note: Do not remove the lithium battery while the unit operation batteries are removed;
otherwise all the calculator’s stored memory will be lost.
1. Perform procedures 1 and 2, as shown above. Do not remove
the unit operation batteries.
2. Remove the screw and the lithium battery cover, as shown.
3. Use a pen to lift the lithium battery out of the battery
compartment.
4. Insert the new battery with the PLUS (+) side facing up.
5. Replace the lithium battery cover and fasten the screw.
6. Replace the battery compartment cover, wait a few seconds
and then press O .
The following message will appear.
7. Press O.
Do not press C . This will clear all the data.
Using the Hard Cover
When in use: To open the cover: When not in use:
B: Backspace delete key
D: Delete key
i: Toggle input mode between insert and overwrite (in one-line edit mode).
;: Allows you to set up the basic behavior of this calculator, such as to set answers
in scientic or normal notation.
Menu keys
M: Enter the Math menu with additional mathematical functions.
S: Enter the statistics menu.
P: Enter the programming menu.
V: Converts hexadecimal, decimal, octal and binary numbers or solves systems
of linear equations, nds roots for quadratic and cubic equations.
m: Enter menu for matrix functions.
n: Enter screen and menu for Solver features.
z: Enter the menu for calculator specic variables.
g: Enter menu for nancial solver and functions.
Scientic Calculation keys
See full manual for details.
Resetting the Calculator
Use the reset when a malfunction occurs, to delete all data, or to set all mode values to the
default settings. The resetting can be done by either pressing the reset switch located in the
battery compartment, or by selecting the reset in the OPTION menu.
Resetting the calculator’s memory will erase all data stored by the user; proceed with caution.
1. Using the reset switch
1. Pull down the notch to open the battery cover located on
the back of the calculator.
2. Place the battery cover back until the notch is snapped on.
3. Wait a few seconds and press O. The verication
window will appear on the screen.
4. Press C to clear all the stored data. Press O to
cancel resetting. After C is pressed, the calculator‘s
memory will be initialized. Press any key to display
the calculation screen.
Note: If the above verication window does not appear, remove
the battery cover and gently push the RESET switch with the tip
of a ball-point pen or a similar object while pressing O
simultaneously.
DO NOT use a tip of a pencil or mechanical pencil, a broken
lead may cause a damage to the button mechanism.
• The message on the right may occasionally appear. In this case,
repeat the procedure from step 1 to prevent loss of data.
2. Selecting the RESET within the OPTION menu
1. Press @, then p . The OPTION menu appears.
2. While in the OPTION menu, press E to select E RESET ;
the RESET submenu items should appear on the right side of
the screen.
3. The rst item 1 default set will initialize only the SETUP and
FORMAT settings, while the second item 2 All memory will
erase all memory contents and settings. To reset the memory,
select 2 All memory by pressing 2. The verication
window will appear.
4. Press the C key to clear all data stored on the calculator.
Press any key to continue.
Troubleshooting Guide
Error Messages
The calculator will display an error message when a given command is handled incorrectly,
or when instructions cannot be handled correctly such that the task cannot be processed
Specications
Model EL-9950
Product name Graphing Calculator
Display 132 x 64 dot matrix liquid crystal display
Number of digits: mantissa 10 digits, exponents 2 digits (standard
screen); 7 digit display (including negatives, decimals) for table
screen, split screen, etc.
Mantissa of 10 digits in the complex number mode
Display method: Numerical value, calculation equation input (direct
algebraic logic input / one-line input method), fraction, and complex
number display method specication.
Calculation method D.A.L. (Direct Algebraic Logic)
Calculation features Manual calculation (arithmetic, parentheses calculation, memory
calculation, function calculation, integral calculation, coordinate
conversion), binary/octal/decimal/hexadecimal calculation, Boolean
operation, matrix calculation, complex number calculation, complex
function calculation, statistic calculation, regression calculation,
statistic authorization calculation, nancial calculation, etc.
Input method Manual key entry
Graphic features Rectangular/polar/parametric/sequence coordinate graph
Graph range specication, graph window mode automatic specica-
tion, graph plotting, trace, calculation function, zoom, picture input,
paint, graph database register split-screen, etc.
Statistic features 1-/2-variable statistical data input/calculation, register, edit and
frequency input, regression calculation function, and estimated
statistic/authorization function, etc.
Solver features Equation solver: numerical syntax analysis, Newton&bisection
method, graph analysis, and solver equation register.
List features Direct data entry/edit to list, calculation function for various lists, and
list/matrix conversion.
Substitution features Graph drawing, numerical input from split-screen
Slide Show features Screen image capture, play function
The maximum number of pages to be captured: Approx. 250
pages (pages equivalent to the Y = X
2
graph screen)
Program features Condition statement command, subroutine, graph, various function
commands
Option menu Screen contrast adjustment, memory usage check, data delete, data
link (between EL-9950 and PC or another EL-9950)
Memory size 64 KB (user area: approx. 47.4 KB)
Power supply Operation: 6 V DC
AAA manganese battery (R03) × 4
Memory backup: 3 V DC Lithium battery (CR2032) × 1
Automatic power-off Approx. 10 minutes
Operating temperature range
0 °C to 40 °C (32 °F to 104 °F)
Battery life Operation battery set: approx. 150 hours (with 5 minutes of continual
use and 55 minutes in the display state for every hour at a temperatu-
re of approx. 20 °C/68 °F)
Memory backup: approx. 5 years (at a temperature of approx.
20 °C/68 °F, and when the operation batteries are replaced frequently)
Note: The life span may differ according to battery brand, type, usage,
and ambient temperature.
External dimensions 86 mm (W) × 183 mm (D) × 20 mm (H)
3-3/8” (W) × 7-7/32” (D) × 25/32” (H)
Weight Approx. 202 g (with batteries, without the hard cover)
Accessories 4 AAA manganese batteries (included), 1 lithium battery (installed),
operation manual
2. Insert the batteries, as indicated. Make sure that the batteries
are inserted in the correct directions.
3. Pull off the insulation sheet from the memory backup battery.
4. Place the battery cover back, and make sure that the notch is
snapped on.
5. After a few seconds , press O and you will see
the following message on the display:
PRESS [CL] KEY TO CLEAR ALL DATA
PRESS [ON] KEY TO CANCEL
6. Make sure to press C to reset the calculator’s memory . The memory will be
initialized and “ALL DATA CLEARED” will be displayed. Press any key to set the calculator
ready for normal calculation mode.
Note: If the above message does not appear or malfunction
occurs, check the direction of the batteries and close the cover
again. If this does not solve the problem, remove the battery
cover, and then gently push the RESET switch with the tip of a
ball-point pen or a similar object while pressing O simultane -
ously. And then, follow steps 4 to 6 above.
DO NOT use a tip of a pencil or mechanical pencil, a broken lead may cause a damage
to the button mechanism.
Adjusting display contrast
Since the display contrast may vary with the ambient temperature and/or remaining battery
power, you may want to adjust the contrast accordingly. Here’s how:
1. Press @, then p .
2. Adjust the contrast by using the + and - keys.
+: increases the contrast
-: decreases the contrast
3. When done, press C to exit the mode.
Turning the calculator OFF
Press @ o to turn the calculator off.
Automatic power off function
• The calculator is automatically turned off when there is no key operation for approximately
10 minutes (The power-off time depends on the conditions.)
• The calculator will not automatically power off while it is executing calculations (“
█” ashes
on the upper right corner of the display.)
Replacing batteries
The calculator uses two different kinds of batteries: manganese (AAA) for unit operation, and
lithium (CR2032) for memory backup.
Compatible battery types:
Type (use) Model Quantity
Manganese battery
(for unit operation)
AAA 4
Lithium battery
(for memory backup)
CR2032 1
Note: • To prevent loss of stored data, DO NOT remove both the unit operation and
memory backup batteries at the same time.
• Please do not use rechargeable battery. This can lead to a mulfunction of the device.
Precautions for handling batteries
• Fluid from a leaking battery accidentally entering an eye could result in serious injury.
Should this occur, wash with clean water and immediately consult a doctor.
• Should uid from a leaking battery come into contact with your skin or clothes, immediately
wash with clean water.
• If the product is not to be used for some time, to avoid damage to the unit from leaking
batteries, remove them and store in a safe place.
• Do not leave exhausted batteries inside the product.
• Do not t partially used batteries, and be sure not to mix different batteries types.
Part Names and Functions
1 Display screen
2 Power ON/
OFF key
3 Key operation
keys
5 Cursor
keys
4 Graphing
keys
1 Display screen:
Displays up to 132 pixels wide by 64 pixels tall of graphs and texts.
2 Power ON/OFF key:
Turns calculator ON. To turn off the calculator, press @, then o .
3 Key operation keys:
These keys are used to change the key functions.
@: Changes the cursor to “2”, and the next keystroke enters the function or mode
printed above each key in orange.
A: Changes the cursor to “A”, and the next keystroke enters the alphabetical letter
printed above each key in green.
Note: Press @ . to lock the specic keys in the alphabet entering mode.
(ALPHA-LOCK)
4 Graphing keys:
These keys specify settings for the graphing-related mode.
Y: Opens the formula input screen for drawing graphs.
G: Draws a graph based on the formulas programmed in the Y window.
T: Opens a Table based on the formulas programmed in Y.
W: Sets the display ranges for the graph screen.
Z: Changes the display range of the graph screen.
U: Places the cursor pointer on the graph for tracing, and displays the coordinates.
,: Displays the substitution feature.
m: Displays both a graph and a table at the same time.
y: Opens the table setup screen.
d: Draws items on the graph. Use this
f: Sets the operations of the graph screen.
k: Calculates specic values based on formulas programmed in Y.
5 Cursor keys:
Enables you to move the cursor (appears as _,
█, etc. on the screen) in four directions. Use
these keys also to select items in the menu.
Reset switch (in the battery compartment):
Used when replacing batteries or clear the calculator memory.
#: Returns calculator to calculation screen.
p: Sets or resets the calculator settings, such as LCD contrast and memory usage.
n: Obtains the screen for the slide show.
l: Accesses list features.
]: Creates your own slide shows.
[: Sets the statistical plotting.
Basic Operation keys
E: Used when executing calculations or specifying commands.
C / q: Clear/Quit key
further. Various types of error messages are given to inform users the types of situations to
be remedied.
For example, performing the following key strokes:
5 | E will result in an error, and the error
message will be displayed.
In such a situation, you can go back to the expression to correct its syntax by pressing
; or f, or you can erase the entire line to start over by pressing C.
For a list of various error codes and messages, refer to the appendix.
The calculator’s power won’t turn on!
• The operation batteries may not be installed, may be exhausted, or may be inserted
incorrectly. Check the operation batteries in the battery compartment.
• Place the battery cover securely or the calculator will not turn on.
The saved calculator congurations are not retained!
• Both the lithium battery and the operation batteries may need to be replaced.
The power seems to be on, but the characters and numbers cannot be seen clearly on
the display!
• The screen contrast may need to be adjusted.
Press @ p , then press A to enter A CTRST ; the screen contrast can
be adjusted by using the + or the - key.
The calculator won’t take the minus (–) sign; calculation results in a syntax error!
• To set a negative value, use the _ key instead of the - key.
The calculation results are very different from what is usually expected!
• The angle unit and other congurations may be incorrectly set.
Check the conguration under the @ ; .
The graph cannot be seen!
• Check the zoom conguration. Try selecting the automatic zoom tool, by pressing
Z, then A 1.
• The graph line may be set differently; check the line conguration under @
d menu.
• The calculator may not be set to display graphs. Check the “= ” sign in Y= screen.
• Graphs drawings may be interrupted in rare cases when equations of Graphs have
a list format.
The screen images cannot be stored (SLIDE SHOW)
• The available memory may be too small to store the screen image. Select
“B MEMCHK” under @ p menu. Select and delete unnecessary items under
“C DEL”.
The calculator is not responding; the software appears to have crashed!
• Press O. If this does not work, then press @, then O to tell the running
application to quit.
If everything fails, then the calculator’s memory may need to be reset. Resetting the
calculator’s memory will clear all the stored information, such as programs, lists, and
variables.
To reset the unit’s memory, open and close the battery compartment cover, wait a few
seconds, and then press O to open the verication window. To prevent data loss,
try O rst.
If it does not work, repeat the reset operation and press C when prompted.
Calculation Range
Arithmetic calculation
The results for dividend, multiplicand and operand are:
-1 × 10
100
< x ≤ -1 × 10
-99
, 1 × 10
-99
< x ≤ 1 × 10
100
or x = 0
(valid within the range of display capability)
Note: Calculation results and input values less than 1 × 10
-99
are considered equal to 0.
Function calculation
Calculation accuracy
In principle, calculation errors are ±1 of the last digit. (In case of exponential display, the
calculation errors are ±1 of the last digit of the mantissa display.)
However, a calculation error increases in continuous calculations due to accumulation of each
calculation error. (This is the same for a
b
, √ b, n!, e
x
, In, etc. where continuous calculations
are performed internally.)
Additionally, a calculation error will accumulate and become larger in the vicinity of inection
points and singular points of functions. (for example, calculating sinh X or tanh X at X = 0)
