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
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
.
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