Calculated Industries 3058 User Manual

GRADEMATIC 4000™

The Ultimate Teacher’s Aid

User’s Guide

TA B L E O F CO N T E N T S

I n t roducing GradeMatic 4000 . . . . . . .3

F e a t u re s . . . . . . . . . . . . . . . . . . .3

S p e c i f i c a t i o n s . . . . . . . . . . . . . . .4

Operating Fundamentals . . . . . . . . . . .5

Power On/Off . . . . . . . . . . . . . .5

D i s p l a y . . . . . . . . . . . . . . . . . . .5

Full Reset/All Clear . . . . . . . . . . .6

Battery Inform a t i o n . . . . . . . . . . .6

S t o p w a t c h / Ti m e r . . . . . . . . . . . .8

Basic Math . . . . . . . . . . . . . . . . .9

Cumulative Memory . . . . . . . . .1 1

G PA Scale Va l u e s . . . . . . . . . . .1 3

Grading Display . . . . . . . . . . . .1 4

Grading Exerc i s e s . . . . . . . . . . . . . .1 5

Default Grading Scale . . . . . . . .1 5

Working with Maximum and

Minimum Points . . . . . . . . . .1 6

Customizing GradeMatic 4000 . . .2 0

P re f e re n c e s . . . . . . . . . . . . . . . .2 0

Converting Scores & Grades . . . .2 6

Averaging Grades . . . . . . . . . . .3 3

Grade Weighting . . . . . . . . . . .3 5

Custom Grade Scales . . . . . . . . .4 3

Custom Grade Scale Form . . . . .4 9

Key Definitions . . . . . . . . . . . . . . . . .5 0

Wa r r a n t y . . . . . . . . . . . . . . . . .5 9

How to Reach CII Headquarters .6 3

2 – GradeMatic 4000

™

IN T R O D U C I N G
GR A D EMAT I C 4 0 0 0

F e a t u re s

The GradeMatic 4000 grading calculator,

dubbed by teachers world wide as “the
ultimate teacher’s ai d e , ” p rovides the fol­lowing feature s :

◆ P e rmanently stores teacher’s custom

grade scale until changed or re s e t

◆ Complete combining of numerical

and letter grades

◆ Multiple grade format displays

◆ Time saving Auto-weighting feature

◆ Built-in Points–off/Negative grading

◆ “No-Grade” key for excused absences

◆ Stopwatch and countdown timer with

optional “buzzer”

◆ User definable pre f e rence settings

U s e r ’s Guide – 3

S p e c i f i c a t i o n s

◆ M e a s u re m e n t s

Imperial: 5.25 x 2.75 x 0.25-inch
Metric: 133 x 70 x 6.5mm

◆ We i g h t

4 oz. (114 g)

◆ Power Source

One 3-Volt Lithium CR-2032 battery

◆ Accuracy

10 digits (intern a l )

◆ Grade Point Average (GPA) Systems

4.0, 5.0, 12.0

◆ Grade Display Form a t s

G PAs 4, 5, 12
Scaled %
True %
P o i n t s

◆ Max # of Grades per Student

9 9

◆ Max # of Students per Class

9 9

4 – GradeMatic 4000

™

OPERATING FUNDAMENTALS

Power On/Off

On/C

Off

To turn your calculator on, press
[On/C]. To turn it off, press [Off]. If the
calculator is already on, a single press
of [On/C] clears the last entry; a double
press clears all temporary values. If left
on more than 12 minutes without activ­ity, the auto–save feature shuts the cal­culator off, however, all memory values
are preserved.

Note: If the timer/stopwatch is running, the
automatic shutdown is disabled.

Display

Your GradeMatic 4000 has a 10–digit
internal accuracy and uses a standard
5/4 rounding technique for an accurate
8–digit display.

User’s Guide – 5

Full Reset/All Clear

A/C

Set

+

Clears all values from memory and
resets all settings to defaults. See
Table 1 for a list of circumstances
under which you may want to per­form a full reset.

Note: If you do not want to lose specific set­tings or values, have them written some­where so you can re-enter them after a full
reset.

Battery Information

GradeMatic 4000 is powered by a sin­gle 3-Volt Lithium CR-2032 battery. If
the display becomes weak or erratic,
replace the battery.

Note: Just as a full reset ([Set] [x]) clears all
settings and values, so does changing the
battery. See Table 1 for a list of values and
settings that are deleted from memory when
the battery is changed.

6 – GradeMatic 4000

™

Table 1

[On/C]

[On/C] [On/C]

[Off]

[Set] [x]

Last Math Entry ••••
Prev. Math Entries •••
Last Grade Entry ••••
Prev. Grade Entries •••
Maximum/Minimum Pts ••
Class Average ••
‘Auto’ Weights ••
Grade Display Format •
Custom Grade Scale •
Preference Settings •

User’s Guide – 7

S t o p w a t c h / Ti m e r

GradeMatic 4000 includes a full function
stopwatch/timer with buzzer feature. Able to
count up from zero or down from an
e n t e red time, the count is displayed in an
h o u r , minute, second format. While count­ing, a clock symbol flashes at the left of the
display.

Displays, starts and stops the timer. If a
value is entered prior to starting the timer,
the timer counts d o w n f rom the time
e n t e red.

1 . To count up from zero, pre s s :

[ Timer] [ Ti m e r ]

2 . To count down, press [ Ti m e r ], enter the

time from which the count will start,
then press [ Timer] a g a i n .

[ Timer] 1100 [Ti m e r ]

If you press [ O ff ] while the timer is
running, the calculator beeps to indi­cate the timer is still counting.
P ressing [ O ff ] again will stop the
timer and shut down the calculator.

8 – GradeMatic 4000

™

Basic Math

GradeMatic 4000 uses standard chaining
logic for calculations. This means that
when solving a problem, it solves in the
order entered.

Keystrokes Display

3 [+] 2 [=] 5.
3 [–] 2 [=] 1.
3 [x] 2 [=] 6.
3 [÷] 2 [=] 1.5

Percent Calculations

%

The percent key is used to find a
given percentage of a number or for
working add–on, discount, or divi­sion percentage calculations.

Keystrokes Display

355 [x] 15 [%] 53.25
100 [÷] 50 [%] 200.
250 [+] 6.5 [%] 266.25
25 [–] 5 [%] 23.75

User’s Guide– 9

Delta Percent

Set

%

Finds the percent change between two
values. Pr ess [=] to display answer.

Keystrokes Display

10 [Set] [%] 15 [=] 50.
100 [Set] [%] 25 [=] –75.

Square Root

—

√

Set

+

Calculates the square root of a given
number.

Keystrokes Display

[144] [Set] [+] 12.

[100] [Set] [+] 10.

10 – GradeMatic 4000

™

Cumulative Memory

The GradeMatic 4000 has a cumulative
Memory function that allows you to
store a value for future use. When a
value is stored in memory, it does not
change until revised or the calculator is
reset. Values can be stored in any for­mat. You may also subtract and replace
values. The following keys add, sub­tract and recall memory values:

M

+

Adds a displayed value to memory.

M

Rcl

Displays the memory total.

Set

Subtracts the displayed value from
memory.

Displays and clears the value stored in
the memory.

Clears the value stored in memory
without changing the current display.

+

M

+

RclRcl

RclSet

User’s Guide – 11

Using the Memory Function

S t e p / K e y s t ro k e s Display

1. Clear calculator:

[On/C] [On/C] 0 .

2 . Enter values into memory :

[25] [M+] 2 5 .
[30] [M+] 3 0 .

M
M

3 . Display the memory total:

[Rcl] [M+] 5 5 .

M

4 . Replace Memory value:

75 [Set] [Rcl] [M+] 75.

M

5 . Subtract 30 from the memory total:

[30] [Set] [M+] 3 0 .

M

6 . Display the results and clear memory :

[Rcl] [Rcl] 45.

7 . Clear the display:

[On/C] [On/C] 0 .

1 2 – GradeMatic 4000

™

G PA Scale Values

GradeMatic 4000 i n t e rnally calculates let­ter and number grades based on these
scales for GPAs 4.0, 5.0, and 12.0

G PA 4.0 G PA 5.0 G PA 12.0
A + 4 . 3 3 5 . 3 3 1 3 . 0 0
A 4 . 0 0 5 . 0 0 1 2 . 0 0
A – 3 . 6 7 4 . 6 7 1 1 . 0 0
B + 3 . 3 3 4 . 3 3 1 0 . 0 0
B 3 . 0 0 4.00 9 . 0 0
B – 2 . 6 7 3 . 6 7 8 . 0 0
C + 2 . 3 3 3 . 3 3 7 . 0 0
C 2 . 0 0 3 . 0 0 6 . 0 0
C – 1 . 6 7 2 . 6 7 5 . 0 0
D + 1 . 3 3 2 . 3 3 4 . 0 0
D 1 . 0 0 2 . 0 0 3 . 0 0
D – 0 . 6 7 1 . 6 7 2 . 0 0
F 0 . 0 0 1 . 0 0 0 . 0 0

When averaging grades, your calculator
averages the grade percentages then con­verts the percentage to the values s h o w n
a b o v e .

Sum of [(Scores) x (Weights)]

Grade =

Sum of We i g h t s

U s e r ’s Guide – 1 3

Grading Display

The number “12” re p resents the num­ber of grade entries, the value to its
right is the numerical value of the last
entry (defined by the grade format). To
the right of the numerical value is the
c o r responding letter grade. All are
identified by annunciators. (N U M, %
and G R A D E). “AV G” appears when
averaging grades.

“ E rror” & “None” Messages

When an entry is incorrect or an
answer is beyond the range of the cal­c u l a t o r, the word “Error” will display.
When this occurs, press any key and
continue where you left off. In some
cases, such as averaging grades, the
word “None” will display to indicate
that a grade value is re q u i red before a
value can be calculated, or the grade
selected is not available due to pre f e r­ence settings.

1 4 – GradeMatic 4000™

GR A D I N G EX E R C I S E S

To learn how to use GradeMatic 4000,
we suggest that you carefully read and
do the following exercises:

I m p o rtant! All exercises in this section use
default values unless otherwise stated.
P ress [Set] [x] to re s t o re GradeMatic 4000
to its default settings.

Default Grading Scale

The following examples use the default
grading scale shown below.

Letter Grade P o i n t s

A 90 - 100
B 80 - 90
C 70 - 80
D 6 0 - 70
F Below 60

U s e r ’s Guide– 1 5

Working with Maximum and
Minimum Points

Maximum Points

Maximum Points is the highest score
possible for a student to achieve on a
given test or assignment as determ i n e d
by the teacher. The default for maxi­mum points is 100.

Minimum Points

Minimum points can either be set
d i rectly, or the GradeMatic 4000 can do
this automatically. When set automati­cally, GradeMatic 4000 multiplies the
maximum points by the D– bre a k p o i n t
p e rcentage (default is 60%).

1 6 – GradeMatic 4000

™

Entering Maximum Points

The following exercise shows how to
change the maximum points and let the
calculator figure the minimum points.
You will also convert the following
s c o res to percent and letter grades
using a maximum points setting of 50.

Student #1 4 6
Student #2 3 5

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear calculator:

[On/C] [On/C] 0 .

2 . Enter 50 maximum points:

50 [Max Pts] 5 0 .

3 . Find the minimum points:

[Min Pts] 3 0 .

4 . Enter the student’s grades:

46 [# Grd] 1 9 2 . 0 0 A –
35 [# Grd] 2 70.00 C –

U s e r ’s Guide – 1 7

Entering Both Maximum and
Minimum Points

Using 150 maximum points and 80
minimum points, convert the following
s c o res to percent and letter grades:

Student #1 1 3 0
Student #2 9 3

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear calculator:

[On/C] [On/C] 0 .

2 . Enter 150 maximum points:

150 [Max Pts] 1 5 0 .

3 . Enter 80 minimum points:

80 [Min Pts] 8 0 .

4 . Enter the student’s grades:

130 [# Grd ] 1 8 6 . 6 6 B +
93 [# Grd ] 2 62.00 D+

N o t e : With the new maximum and mini -

mum points, the passing grade is lower

than with the default minimum points.

1 8 – GradeMatic 4000

™

Resetting Maximum and Minimum
Points to Defaults

S t e p / K e y s t ro k e s D i s p l a y

1 . R e t u rn the maximum and minimum
points to their defaults:

[ O ff] [On/C] 0 .

2 . Verify the maximum points is 100:

[Max Pts] 100.

3 . Verify the maximum points for A+:

[Max Pts] 100.0 A+

N o t e : To verify the entire table for maximum
points, continue pressing [Max Pts].

4 . Verify the minimum points:

[Min Pts] 6 0 .

5 . Verify the minimum points for A+:

[Min Pts] 96.66 A+

N o t e : To verify the entire table for minimum
points, continue pre s s i n g [Min Pts].

U s e r ’s Guide – 1 9

Customizing GradeMatic 4000

With the GradeMatic 4000, you may
customize your calculator to suit your
special needs by:

1) Selecting the grade display format

2) Entering a custom grade scale.

Preferences

Before you begin grading, you may
customize your calculator via the
Preference function. Later you will
learn to further customize your
GradeMatic 4000 by setting a custom
grade scale. The following keys are
used to set preferences:

Set

Used to enter the
Repeated presses of the [÷] key scroll
through the preference settings.

and

+

Plus scrolls forward through the

options for each setting; Minus scrolls
backward. To select an option, leave
it displayed and move to the next set­ting by pressing [÷]. To exit the menu,
press [On/C].

20 – GradeMatic 4000

Preference mode

–

™

.

Settings & Defaults

N o t e : The default option for each setting is

identified with an asterisk (*) .

S c a l e

O p t i o n s : Defined below

% * ( True Percent) is the actual mathe-

matical relationship between the maxi­mum and actual points entered and the
grade scale in use. For example, if the
custom grade scales break point for D–
is 60%, and the maximum/minimum
points are set to 100 and 40, the D–
b reak point displays as 40, not 60.

P T S is used when grading on the Points

system. This format is based on a point
scale defined by the maximum and min­imum points assigned to each grade. If
a numerical grade is entered and [# Grd ]
p ressed, the equivalent letter grade dis­plays; likewise, pressing a letter grade
key displays the equivalent points.

G PA 4 selects the GPA 4 format. Letter

grades are scaled to the numerical
equivalents set for a 4.0 scale. For
example, A is equivalent to 4.00, B to

3.00, etc.

User's Guide – 2 1

G PA 5 selects the GPA 5 format. Letter

grades are scaled to the numerical
equivalents of a 5.0 scale. For example,
A is equivalent to 5.00, B to 4.00, etc.

G PA 12 selects the GPA 12 form a t .

Letter grades are scaled to the numeri­cal equivalents of a 12.0 scale. For
example, A is equivalent to 12.00, B to

9.00, etc.

G % (Grade Scale Percent) corre l a t e s

p e rcentage to the custom grade scale.
For example, if the custom grade scales
b reak point for D– is 60%, and you
reset the minimum points to 40, the D–
b reak point will still display as 60.

N o t e : When changing grade formats, the
displayed value automatically converts to
the new format. The new format becomes
the default until changed or the calculator
is reset.

Note: The GradeMatic 4000 also pro v i d e s
k e y s t roke shortcuts to changing the grading
f o rmat. Refer to S h o rtcuts to Setting Grade
F o rmat for additional inform a t i o n .

2 2 – GradeMatic 4000

™

N o t e : The default for each setting is identi ­fied with an asterisk (*) .

Set A–F

O p t i o n s : Set ALL Set A–F*

To set break points for whole grades
only, leave this setting at SE T A – F. To set
b reak points for + and – grades, select

SE T AL L.

N o t e : Setting the AL L +, AL L – and A+ p re f -

e rences to OF F o v e rrides this pre f e re n c e
when SE T AL L is selected.

All +

O p t i o n s : O n * O ff

If AL L + is set to OF F, p l u s grades cannot
be entered or displayed. If a plus grade
key is pressed, “N o n e ” displays. See SE T

A – F N o t e.

All –

O p t i o n s : O n * O ff

If AL L – is set to OF F, minus grades cannot
be entered or displayed. If a minus grade
key is pressed, “N o n e ” displays. See SE T
A – F N o t e.

U s e r ’s Guide – 2 3

A +

O p t i o n s : O n * O ff

If set to ON, an A + grade can be entere d .
If set to OF F, A + cannot be entered or dis­played. See SE T A–F N o t e.

F a i l

O p t i o n s : F * E

Depending on the option selected, a
failing grade displays as an F or E.

B e e p

O p t i o n s : O ff * O n

If set to ON, a beep sounds with each key
p re s s .

2 4 – GradeMatic 4000

™

Review Maximum Points for Whole
Grades Only

This exercise re q u i res you to temporar­ily change the AL L + and the AL L – p re f­e rence settings to OF F.

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear calculator:

[On/C] [On/C] 0 .

2 . Set All + and All – p re f e r ences to O ff :

[Set] [÷] S C A L E
[ ÷ ] SET A–F
[ ÷ ] On ALL +
[ + ] O ff ALL +
[ ÷ ] On ALL –
[ + ] O ff ALL –

3 . Review the grade scale:

[Max Pts] 1 0 0 .
[Max Pts] 1 0 0 . 0 A

[Max Pts] 9 0 . 0 0 B
[Max Pts] 8 0 . 0 0 C
[Max Pts] 7 0 . 0 0 D
[Max Pts] 6 0 . 0 0 F

N o t e : Change the AL L + and AL L – p re f e r -
ences back to ON b e f o re continuing with
the following exerc i s e s .

U s e r ’s Guide – 2 5

C o n v e rting Scores & Grades

GradeMatic 4000 is most commonly
used for conver ting scores to letter
grades. This is done using either the

[ Av g ] or [# Grd ] k e y .

C o n v e rt Raw Scores to Letter Grades
Using the [Avg] Key

Convert the following raw scores to let­ter grades, then find the class average:

Student #1 8 7
Student #2 5 5
Student #3 6 4

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear calculator:

[On/C] [On/C] 0 .

2 . Enter the student’s score s :

87 [Av g ] 1 87.00 B +
55 [Av g ] 1 55.00 F
64 [Av g ] 1 64.00 D

3 . Find the class average:

[Set] [Av g ] 3 68.66 D +

2 6 – GradeMatic 4000

™

C o n v e rting Single Raw Scores to
Letter Grades (Other than a 100­point Maximum)

This exercise shows how to convert
raw scores using the default grade scale
and maximum points of 200.

Student #1 1 8 7
Student #2 1 5 5
Student #3 1 6 4

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear the class average:

[ O ff] [On/C] 0 .

2 . Enter 200 maximum points:

[200] [Max Pts] 2 0 0 .

3 . Verify the value for maximum points:

[Min Pts] 1 2 0 .

4 . Enter the student’s scores and find

class average:
187 [Av g ] 1 9 3 . 5 0 A

155 [Av g ] 1 77.50 C +
164 [Av g ] 1 82.00 B –
[Set] [Av g ] 3 84.33 B

Do Not Clear the Calculator . . .

U s e r ’s Guide – 2 7

Grade Form a t s

The following shows the diff e rent dis­play formats of the GradeMatic 4000.
The GradeMatic 4000 can be used to
easily convert between form a t s .

K e y s t rokes D i s p l a y

[Set] [•] (P t s) 3 1 6 8 . 6 B
[Set] [2] (G % *) 3 8 4 . 3 3 B
[Set] [4] (G PA 4) 3 2 . 9 3 B
[Set] [5] (G PA 5) 3 3 . 9 3 B
[Set] [6] (G PA 12) 3 8 . 8 0 B
[Set] [1] (% *) 3 8 4 . 3 3 B

* N o t e : Grade Percent (G%) and Tru e
P e rcent (%) will reflect the same values
unless an irregular custom scale is entere d .

C o n v e rt Raw Scores to Letter Grades
Using the [# Grade] Key

This exercise teaches you how to use
the [# Grd] key to convert raw score s
to letter grades. Also, the count will
re p resent the number of students, not
the number of grades p e r student.

2 8 – GradeMatic 4000

™

N o t e : This exercise uses a maximum points
value of 200 and the following raw score s :

Student #1 1 8 7
Student #2 1 5 5
Student #3 1 6 4

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear calculator:

[On/C] [On/C] 0 .

2 . Enter 200 maximum points:

200 [Max Pts] 2 0 0 .

3 . Enter the students’ grades:

187 [# Grd ] 1 9 3 . 5 0 A
155 [# Grd ] 2 77.50 C +
164 [# Grd ] 3 82.00 B –

4 . Find the class average:

[ Av g ] 3 84.33 B

5 . Set display to Points:

[Set] [•] 3 1 6 8 . 6 B

6 . Set display to GPA 4:

[Set] [4] 3 2 . 9 3 B

7 . Set display to True %:

[Set] [1] 3 8 4 . 3 3 B

U s e r ’s Guide – 2 9

C o n v e rt Summed Raw Scores to
Letter Grades

This exercise converts summed score s
(points for an entire grading period) to
final grades. Use 1500 points for the
grading period and the scores below:

Grade 1 3 7 6
Grade 2 1 6 5
Grade 3 5 4 5

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear calculator:

[On/C] [On/C] 0 .

2 . Enter 1500 maximum points:

1500 [Max Pts] 1 5 0 0 .

3 . Verify the minimum points:

[Min Pts] 9 0 0 .

4 . Enter the grades:

376 [+] 3 7 6 .
165 [+] 5 4 1 .
545 [=] 1 0 8 6 .

5 . Find the average:

[ Av g ] 1 72.40 C–

3 0 – GradeMatic 4000

™

Po i n t s - O ff/Negative Score Grading

You can also use the calculator for neg­ative or “points-off” grading. Press the
[ – ] key, enter the number of points off ,
then press [ Av g ]. The following exer­cise assumes a standard 100–point
scale with the points-off scores below:

Student #1 – 1 5
Student #2 – 3 3
Student #3 –0 (100)

S t e p / K e y s t ro k e s D i s p l a y

1 . Reset minimum and maximum points

to their defaults:
[ O ff] [On/C] 0 .

2 . Verify maximum points:

[Max Pts] 1 0 0 .

3 . Verify minimum points:

[Min Pts] 6 0 .

4 . Enter the student’s score s :

[–] 15 [Av g ] 1 8 5 . 0 0 B
[–] 33 [Av g ] 1 6 7 . 0 0 D +
[–] 0 [Av g ] 1 100.0 A+

U s e r ’s Guide – 3 1

Summed Points–off Grading

Assuming a 100–point test, the follow­ing exercise shows you how to calcu­late a student’s average using per–page
p o i n t s – o ff totals. Use the following
grades for this exerc i s e :

– 10 – 5 – 6

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear calculator:

[On/C] [On/C] 0 .

2 . Enter the per–page points–off :

[–] 10 – 1 0
[–] 5 – 1 5
[–] 6 [=] – 2 1

3 . Find the student’s average:

[ Av g ] 1 7 9 . 0 0 C +

3 2 – GradeMatic 4000

™

Averaging Grades

To average letter grades, number g r a d e s ,
or a combinations of both, enter all the
letter or number grades for a student
and press [ Av g ]. Remember, when
entering number grades, enter the num­ber first, then pre s s t h e [# Grd ] k e y .

Averaging Letter Grades

Enter and average the following grades:

B+ C– A–

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear calculator:

[On/C] [On/C] 0 .

2 . Enter the grades:

[ B + ] 1 88.33 B +
[ C – ] 2 71.67 C –

[ A – ] 3 91.67 A –

3 . Find average for grades:

[ Av g ] 3 83.89 B

U s e r ’s Guide – 3 3

Averaging Number & Letter Grades

Enter and average the following num­ber and letter grades:

8 7 B + 64 C –

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear calculator:

[On/C] [On/C] 0 .

2 . Enter the grades:

87 [# Grd ] 1 87.00 B +
[ B + ] 2 88.33 B +
64 [# Grd ] 3 64.00 D
[ C – ] 4 71.67 C –

3 . Find the average for grades:

[ Av g ] 4 77.75 C +

3 4 – GradeMatic 4000

™

Grade Weighting

GradeMatic 4000 p rovides a grade
weighting feature that can be used to
weigh a grade more heavily than oth­ers. For example, the following table
shows that homework and quizzes
account for 50% of a student’s average,
while the grade earned on his or her
m i d - t e rm accounts for the re m a i n i n g
50%.

Grade G r a d e % of W t
is for: E a rn e d G rd Avg Va l u e

H o m e w o r k B + 20 % 2 Wt
Q u i z z e s C – 30 % 3 Wt
M i d - t e rm A – 50 % 5 Wt

T h e re are two methods that may be
used to enter weight factors: manual
grade weighting and automatic grade
weighting. Both are discussed in the
following sections.

Manual Grade We i g h t i n g

If you prefer not to use the automatic
method of grade weighting, you can man­ually weight individual grades as you
enter them. To manually weight a grade,
enter the grade, the weight value, then
p ress the [ W t ] key. For example, if a stu-

U s e r ’s Guide – 3 5

dent earned an A– and you want it to
have a weight factor of 5, you would
e n t e r : [A–] 5 [Wt].

Automatic Grade We i g h t i n g

This method saves keystrokes and time
by using the semi-permanent weight
table. You can use this table to assign
weight values for up to ten (10) grades.
Once this table is set up, each grade
e n t e red is automatically weighted with
the corresponding weight value. It is
important to remember that while aver­aging a student’s grades, you must
always enter the grades in the same
order the weight values were assigned.
For example, if the first grade on the
table re p r esents homework scores and
accounts for 20% of the overall grade,
while entering the student’s grades, you
will always enter the homework score
first so that it is weighted corre c t l y .
Otherwise the grade will not re c e i v e
the correct weight factor.

N o t e : To clear the weight table, turn the cal ­culator off by pressing the [ O ff ] k e y.

3 6 – GradeMatic 4000

™

Manually Weighted Letter Grades

Enter and average these weighted letter
grades using manual weighting:

Grade # G r a d e Wt Factor
#1 (Homework) B + 1 (or 10%)

#2 (Quizzes) C – 2 (or 20%)
#3 (Mid-term ) A – 7 (or 70%)

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear calculator:

[On/C] [On/C] 0 .

2 . Enter the weighted grades:

[ B + ] 1 8 8 . 3 3 B +
[C–] 2 [Wt] 2 71.67 C –
[A–] 7 [Wt] 3 91.67 A –

3 . Find the average for grades:

[ Avg] 3 87.33 B +

Note the diff e rence between weighted and
unweighted grades. In the Averaging Letter
G r a d e s e x e rcise, where no grade weight ­ing was applied, the same grades earn e d
only a B average. With grade weighting,
this student earned a B +.

U s e r ’s Guide – 3 7

Manually Weighted Letter &
Number Grades

Enter and average these weighted l e t t e r
and number grades (100-point maximum)
using manual weighting:

Grade # G r a d e Wt Factor
#1 (Homework) B + 1 (or 10%)

#2 (Quizzes) 9 3 2 (or 20%)
#3 (Mid-term ) A – 7 (or 70%)

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear calculator:

[On/C] [On/C] 0 .

2 . Enter the first grade:

[ B + ] 1 88.33 B+

3 . Enter the second grade:

93 [# Grd ] 2 93.00 A–

4 . Enter the second grades' wt . factor:

2 [Wt] WT 2 93.00 A–

5 . Enter the third grade and wt. factor:

[A–] 7 [Wt] WT 3 91.67 A–

6 . Find the average for grades:

[ Av g ] 3 91.60 A–

3 8 – GradeMatic 4000

™

Entering Automatic Grade Weights

Enter your own automatic weight table
by using the weight factors below:

Grade # Wt Factor
#1 (Homework) 1 (or 10%)

#2 (Quizzes) 2 (or 20%)
#3 (Mid-term ) 7 (or 70%)

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear calculator:

[On/C] [On/C] 0 .

2 . Select the weight table:

[Set] [Wt] 1 1.00

3 . Enter the weight factors:

1 [Set] 1 1.00
2 [Set] 2 2.00
7 [Set] 3 7.00

4 . Exit auto-weight setup:

[On/C] [On/C] 0 .

U s e r ’s Guide – 3 9

Review Automatic Grade We i g h t s

Once values have been entered for the
weight table, “W T” will stay lit in the
top corner of the LCD. To re v i e w
weight values, press [ W t ]. Any weights
not entered will carry the default 1 . 0 0.

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear calculator:

[On/C] [On/C] 0 .

2 . Verify the weight values:

[ W t ] 1 1.00
[ W t ] 2 2.00
[Wt] 3 7.00

3 . Continue pressing [Wt] until all 10

values are verified.

N o t e : Weights 4–10 are valued at 1.00
because no change was made.

4 . Clear display and exit the weight

t a b l e :
[On/C] [On/C] 0 .

4 0 – GradeMatic 4000

™

Averaging Weighted Grades

Enter and average the scores listed below.
Remember to enter them in the same
order as listed in the weight table.

Grade # G r a d e
#1 (Homework) B +

#2 (Quizzes) C –
#3 (Mid-term ) A –

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear calculator:

[On/C] [On/C] 0 .

2 . Enter the grades:

[ B + ] 1 88.33 B +
[ C – ] 2 71.67 C –
[ A – ] 3 91.67 A–

3 . Find the average:

[ Av g ] 3 87.33 B +

Note: For a class of 25 students, each with
t h ree grades to be averaged, auto-weight ­ing saves you 150 keystro k e s !

U s e r ’s Guide – 4 1

Using the [No Grd] Key

Using the previously entered weights,
average the following auto-weighted
grades. This time, assume Grade #3 was
missed because of an excused absence.

Grade # G r a d e
#1 (Homework) B +

#2 (Quizzes) C –
#3 (Mid-term ) E x c u s e d

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear calculator:

[On/C] [On/C] 0 .

2 . Enter the grades:

[ B + ] 1 88.33 B +
[ C – ] 2 7 1 . 6 7 C –

[No Grd ] no Gr

3 . Find the average:

[ Av g ] 3 77.22 C+

4 . Clear and exit the weight table:

[ O ff] [On/C] 0 .

4 2 – GradeMatic 4000

™

Custom Grade Scales

Wi t h t h e GradeMatic 4000 you can
e n t e r, recall and store your own custom
grade scale. Grade scales are usually set
for whole-grade (A/B/C/D/F) bre a k
points with incremental bre a k s
(B+/B/B–) automatically divided even­ly within the whole-grade range. If pre­f e r red, you can manually enter your
own values for the whole-grade and
+/– break points.
When entering a custom grade scale,
the minimum value is used to define
the minimum breakpoint of a letter
grade. The GradeMatic 4000 will take
the entered value, convert it to an
equivalent percentage and perm a n e n t­ly store this percentage as the minimum
b reakpoint. All custom grade scale
entries are assumed to be point values
unless the [%] key is used. If [%] is
used, then the actual entry is stored and
not converted.
A custom grade scale remains in per­manent memory until [Set] [x] is used to
re s t o re the default grade scale or you
enter a diff e rent custom grade scale.

U s e r ’s Guide – 4 3

Enter a Custom Grade Scale

Sample Scale

A = 93.0 – 100. B = 85.0 – 93.0
C = 75.0 – 85.0 D = 65.0 – 75.0
F = 0.0 – 65.0

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear the calculator:

[ O ff] [On/C] 0 .

2 Set the minimum points for “A“:

93 [Set] A 93.0–100. A

3 . Set the minimum points for “B”:

85 [Set] B 8 5 . 0 – 9 3 . 0 B

4 . Set the minimum points for “C”:

75 [Set] C 7 5 . 0 – 8 5 . 0 C

5 . Set the minimum points for “D”:

65 [Set] D 6 5 . 0 – 7 5 . 0 D

4 4 – GradeMatic 4000

™

Review Point Range for Letter Grade

To view the points range for a letter
grade press the [ R c l ] key then the letter
g r a d e .

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear calculator:

[On/C] [On/C] 0.

2 . Enter 100 maximum points:

100 [Max Pts] 1 0 0 .

3 . Verify maximum points and re v i e w

grade scale:
[Rcl] [A+] 97.6 – 100. A +

[ A ] 95.3 – 97.6 A
[ A – ] 93.0 – 95.3 A –

[ B + ] 90.3 – 93.0 B +
[ B ] 87.6 – 90.3 B
[ B – ] 85.0 – 87.6 B –
[ C + ] 81.6 – 85.0 C +
[ C ] 78.3 – 81.6 C
[ C – ] 75.0 – 78.3 C –

[ D + ] 71.6 – 75.0 D +
[ D ] 68.3 – 71.6 D
[ D – ] 65.0 – 68.3 D –
[ F ] 0.00 – 65.0 F

U s e r ’s Guide – 4 5

Review Grades with Maximum
Points Greater than 100

S t e p / K e y s t ro k e s D i s p l a y

1 . Clear calculator:

[On/C] [On/C] 0 .

2 . Change the maximum points to 500:

[500] [Max Pts] 5 0 0 .

3 . Review the grade scale:

[Max Pts] 500. 0 A+
[Max Pts] 4 8 8 . 3 A
[Max Pts] 4 7 6 . 6 A –
[Max Pts] 4 6 5 . 0 B +
Continue reviewing . . .

N o t e : To review the minimum points for
grades, follow the same steps but use the
[Min Pts] key instead of the [Max Pts] k e y.

4 6 – GradeMatic 4000

™

Plus/Minus Custom Scale

The following exercise shows how to
enter a “nonlinear” custom grade scale
with all grade-break levels (including
plus and minus).

For a “linear” grade point scale, the
b reak point spread is equal as shown
in the following table. Note that the
point spread for each grade is 2.5.

G r a d e P o i n t s Point Spre a d
A + 97.5 –100 2 . 5

A 95.0– 97.5 2 . 5
A – 92.5 – 95.0 2 . 5
B + 90.0– 92.5 2 . 5

Non–linear point scales do not have
equal point spreads as does a linear
scale. The following table is an exam­ple of a nonlinear point spre a d .

G r a d e P o i n t s Point Spre a d
A + 98.0 – 100 2

A 95.5 – 98.0 2.5
A – 94.0 – 9 5.5 1 . 5
B + 91.0 – 94.0 3

U s e r ’s Guide – 4 7

Set a Plus/Minus Custom Scale

S t e p / K e y s t ro k e s D i s p l a y

1 . Change the SE T A – F p re f e rence to

SE T AL L:

[ O ff] [On] 0 .
[Set] [÷] [÷] SET A–F
[ + ] SET ALL
[ O n / C ] 0 .

2 . Set the minimum points for “A+”:

98 [Set] [A+] 98.0–100. A+

3 . Set the minimum points for “A”:

95.5 [Set] [A] 95.5– 98.0 A

4 . Set the minimum points for “A–”:

94 [Set] [A–] 9 4 . 0 – 9 5 . 5 A –

5 . Set the minimum points for “B+”:

91 [Set] [B+] 91.0–94.0 B +
Continue until done . . .

6 . Verify the settings:

[Rcl] [A+] 9 8 . 0 – 1 0 0 . A +
[Rcl] [A] 9 5 . 5 – 9 8 . 0 A
[Rcl] [A–] 9 4 . 0 – 9 5 . 5 A–
[Rcl] [B+] 9 1 . 0 – 9 4 . 0 B +
Continue until done . . .

4 8 – GradeMatic 4000

™

CU S T O M GR A D E SC A L E

P l u s W h o l e M i n u s

A / /

B / /

C / /

D / /

P l u s W h o l e M i n u s

A / /

B / /

C / /

D / /

U s e r ’s Guide – 4 9

KEY DEFINITIONS

On/C

Power On/Clear: Turns power on and
clears display. One press clears an
incorrect entry so you can continue
your calculation or grade entries.
Two presses clear the calculator in
preparation for the next function.

Off

Power Off: Turns power off and
clears all non–permanent memory.

Set

Set: Used with other keys to access
secondary functions.

AND

–

0

9

Math Digits: Enters numbers.

Math Operators: Used to perform

mathematical calculations.

•

50 – GradeMatic 4000

™

A/C

Set

+

All Clear: Also referred to as a Full
Reset. Clears all memory and resets
to factory defaults.

Rcl

Recall: Recalls stored values and set­tings.

%

Percent Key: Four-functions. Used in
percent calculations.

Set

%

Delta Percent: Calculates the percent
difference between two numbers.

–

+

A

F

Letter Grades: Used to enter a letter
grade. To review the points range for
a letter grade, press [Rcl], then the
letter grade key. To set a custom
scale for letter grades, refer to the
exercise,
in the

“Enter a Custom Grade Scale”

Custom Grade Scales

section.

User’s Guide – 51

Max Pts

Maximum Points: Used to enter or
view maximum points. Turning the
calculator off resets maximum points
to 100 (default). See also

Working

with Maximum and Minimum Points

Min Pts

Minimum Points: Used when chang­ing or viewing minimum points. If
maximum points are changed,you
can let the GradeMatic 4000 auto-
matically compute the minimum
points. For more information on min­imum points refer to

Maximum and Minimum Points

# Grd

Working with

.

Number Grade: Used to enter num­ber grades.

No Grd

No Grade: Lets you enter unpenalized
missed grades and maintain a consis­tent weight factor for all scores.

.

52 – GradeMatic 4000

™

Avg

Average: Finds a student’s grade aver­age, adds it to the overall class aver­age and prepares the calculator for a
new grade set entry.

Class Avg

Avg

Set

Class Average: Calculates the class
average. To clear a class average,
press [Set] [Avg] [Avg]. Turning off the
calculator also clears the class aver­age, but pressing [On/C] does not.

Wt

Weight Key: Used to weigh the grade
entry. Use with [Set] to build the
semi-permanent weight table for
automatic grade weighting.

M

+

Add to Memory: Adds the displayed
value to memory. This value remains
constant until added to or subtracted
from, or cleared. Since student grades
are automatically stored in memory
while class averaging, do not manu­ally enter grades into memory.

User’s Guide – 53

M

+

Set

Memory Subtract: Subtract the dis­played value from the memory total.

RclRcl

Memory Recall: Two presses in suc­cession clears memory and shows the
total.

RclSet

Clear Memory: Clears memory with­out clearing the display.

Timer

Timer: Displays, starts and stops the
timer. If a value is entered prior to starting
the timer, the timer counts down from the
time entered.

+/–

Set

–

Change Sign: Toggles the sign of the
displayed value.

54 – GradeMatic 4000™

—

√

Set

+

Square Root: Finds square root of the
displayed number.

Shortcuts to Setting Grade Format

Points

GPA 4.0

GPA 5.0

GPA 12.0

Grade Percent

True Percent

Set

Set

Set

Set

Set

Set

•

4

5

6

2

1

User’s Guide – 55

NO T E S

5 6 – GradeMatic 4000

™

NO T E S

U s e r ’s Guide – 5 7

NO T E S

5 8 – GradeMatic 4000

™

WA R R A N T Y RE PA I R SE RV I C E — U S A

Calculated Industries, Inc. (“CII”) war­rants this product against defects in
materials and workmanship for a peri­od of one (1) year from the date of
original consumer purchase in the U.S.
If a defect exists during the warranty
period, CII at its option will either
repair (using new or re m a n u f a c t u re d
part) or replace (with a new or re m a n­u f a c t u red unit) the product at no
c h a rge.

TH E WA R R A N T Y W I L L N O T A P P LY T O T H E P R O D-

U C T I F I T H A S B E E N D A M A G E D B Y M I S U S E, A B U S E,
A LT E R AT I O N, A C C I D E N T, I M P R O P E R H A N D L I N G O R
O P E R AT I O N, O R I F U N A U T H O R I Z E D R E PA I R S A R E
AT T E M P T E D O R M A D E. SO M E E X A M P L E S O F D A M -
A G E S N O T C O V E R E D B Y WA R R A N T Y I N C L U D E, B U T
A R E N O T L I M I T E D T O, B AT T E RY L E A K A G E, B E N D I N G,
O RV I S I B L E C R A C K I N GO F T H E LCD W H I C H A R EP R E -
S U M E D T O B E D A M A G E S R E S U LT I N G F R O M M I S U S E
O R A B U S E.

To obtain warranty service in the
U.S., ship the product postage paid to
the CII Authorized Service Provider list­ed on the back page of the User’s
Guide. Please provide an explanation
of the service re q u i rement, your name,
a d d ress, day phone number and dated
p roof of purchase (typically a sales
receipt). If the product is over 90 days
old, include payment of $6.95 for
re t u rn shipping and handling within

U s e r ’s Guide – 5 9

the contiguous 48 states. (Outside the
contiguous 48 states, please call CII for
re t u rn shipping costs.)

A re p a i red or replacement pro d u c t
assumes the remaining warranty of the
original product or 90 days, whichever
is longer

NO N-WA R R A N T Y RE PA I R SE RV I C E — U S A

Non-warranty repair covers service
beyond the warranty period or service
requested due to damage resulting fro m
misuse or abuse.
Contact the CII Authorized Service
P rovider listed on the back page of this
User’s Guide to obtain current pro d u c t
repair information and charges. Repairs
a re guaranteed for 90 days.

RE PA I R SE RV I C E — OU T S I D E T H E U S A

Not all countries have CII Authorized
Service Providers or the same warranty
and service policies. To obtain warran­ty or non-warranty repair service for
goods purchased outside the U.S., con­tact the dealer through which you ini­tially purchased the product. If you
cannot reasonably have the pro d u c t
re p a i red in your area, you may contact
CII to obtain current product re p a i r
i n f o rmation and charges, including
f reight and duties.

6 0 – GradeMatic 4000

™

DI S C L A I M E R

CII M A K E S N O WA R R A N T Y O R R E P R E S E N TAT I O N,

E I T H E R E X P R E S S O R I M P L I E D, W I T H R E S P E C T T O T H E
P R O D U C T’S Q U A L I T Y, P E R F O R M A N C E, M E R C H A N-
TA B I L I T Y, O R F I T N E S S F O R A PA RT I C U L A R P U R P O S E.

AS A R E S U LT, T H I S P R O D U C T, I N C L U D I N G B U T N O T

L I M I T E D T O, K E Y S T R O K E P R O C E D U R E S, M AT H E M AT I-
C A L A C C U R A C Y A N D P R E P R O G R A M M E D M AT E R I A L,
I S S O L D “A S I S,” A N D Y O UT H EP U R C H A S E RA S S U M E
T H E E N T I R E R I S K A S T O I T S Q U A L I T Y A N D P E R F O R-
M A N C E.

IN N O E V E N T W I L L CII B E L I A B L E F O R D I R E C T,

I N D I R E C T, S P E C I A L, I N C I D E N TA L, O R C O N S E Q U E N T I A L
D A M A G E S R E S U LT I N G F R O M A N Y D E F E C T I N T H E
P R O D U C T O R I T S D O C U M E N TAT I O N.

The warranty, disclaimer, and re m e­dies set forth above are exclusive and
replace all others, oral or written,
e x p ressed or implied. No CII dealer,
agent, or employee is authorized to
make any modification, extension, or
addition to this warranty.

Some states do not allow the exclu­sion or limitation of implied warranties
or liability for incidental or consequen­tial damages, so the above limitation or
exclusion may not apply to you. This
warranty gives you specific rights, and
you may also have other rights which
vary from state to state.

U s e r ’s Guide – 6 1

FCC CL A S S B

This equipment has been certified to
comply with the limits for a Class B
computing device, pursuant to Subpart
J of Part 15 of FCC rules.

Looking for New Ideas

Calculated Industries, a leading manu­f a c t u rer of special function calculators
and digital measuring instruments, is
always looking for new product ideas
in these are a s .

If you have one, or if you have any
suggestions for improvements to this
p roduct or its User’s Guide, please call

or write our Product Development

Department. Thank you.

6 2 – GradeMatic 4000

™

How To Reach CII Headquarters

Mail

Calculated Industries, Inc.
4840 Hytech Drive
Carson City, NV 89706 USA

Phone

775/885–4975

Fax

775/885–4949

n

o

C

s

r

i

t

a

y

C

MAY-6 97

.32

V

N

Email

[e-mail]

World Wide Web

http://www.calculated.com

User’s Guide – 63

Calculated Industries

is a registered trademark and

GradeMatic 4000™

is a trademark of

Calculated Industries, Inc.

LL RIGHTS RESERVED

A

®

Designed in the United States of America

©

by Calculated Industries, Inc.

1998,

Calculated Industries, Inc.

U.S. Patent Numbers:

4,715,011 and 5,233,552

U.S. Patent Numbers:

4,715,011 and 5,233,552

Printed in Indonesia

Manual 3058–MN–A