Calculated Industries GradeMatic 4000 User manual

GRADEMATIC 4000™
The Ultimate Teacher’s Aid
User’s Guide

Introducing GradeMatic 4000 . . . . . . .3
Features . . . . . . . . . . . . . . . . . . .3
Specifications . . . . . . . . . . . . . . .4
Operating Fundamentals . . . . . . . . . . .5
Power On/Off . . . . . . . . . . . . . .5
Display . . . . . . . . . . . . . . . . . . .5
Full Reset/All Clear . . . . . . . . . . .6
Battery Information . . . . . . . . . . .6
Stopwatch/Timer . . . . . . . . . . . .8
Basic Math . . . . . . . . . . . . . . . . .9
Cumulative Memory . . . . . . . . .11
GPA Scale Values . . . . . . . . . . .13
Grading Display . . . . . . . . . . . .14
Grading Exercises . . . . . . . . . . . . . .15
Default Grading Scale . . . . . . . .15
Working with Maximum and
Minimum Points . . . . . . . . . .16
Customizing GradeMatic 4000 . . .20
Preferences . . . . . . . . . . . . . . . .20
Converting Scores & Grades . . . .26
Averaging Grades . . . . . . . . . . .33
Grade Weighting . . . . . . . . . . .35
Custom Grade Scales . . . . . . . . .43
Custom Grade Scale Form . . . . .49
Key Definitions . . . . . . . . . . . . . . . . .50
Warranty . . . . . . . . . . . . . . . . .59
How to Reach CII Headquarters .63
TABLE OF CONTENTS
2 – GradeMatic 4000™

Features
The GradeMatic 4000 grading calculator,
dubbed by teachers world wide as “the
ultimate teacher’s aide,” provides the fol-
lowing features:
◆Permanently stores teacher’s custom
grade scale until changed or reset
◆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 preference settings
INTRODUCING
GRADEMATIC 4000
User’s Guide – 3

Specifications
◆Measurements
Imperial: 5.25 x 2.75 x 0.25-inch
Metric: 133 x 70 x 6.5mm
◆Weight
4 oz. (114 g)
◆Power Source
One 3-Volt Lithium CR-2032 battery
◆Accuracy
10 digits (internal)
◆Grade Point Average (GPA) Systems
4.0, 5.0, 12.0
◆Grade Display Formats
GPAs 4, 5, 12
Scaled %
True %
Points
◆Max # of Grades per Student
99
◆Max # of Students per Class
99
4 – GradeMatic 4000™

Power On/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 activ-
ity, the auto–save feature shuts the cal-
culator 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.
Off
On/C
OPERATING FUNDAMENTALS
User’s Guide – 5

Full Reset/All Clear
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 per-
form a full reset.
Note: If you do not want to lose specific set-
tings or values, have them written some-
where so you can re-enter them after a full
reset.
Battery Information
GradeMatic 4000 is powered by a sin-
gle 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.
Set
A/C
+
6 – GradeMatic 4000
™

User’s Guide – 7
Table 1
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 •
[On/C] [On/C] [On/C] [Off] [Set] [x]

Stopwatch/Timer
GradeMatic 4000 includes a full function
stopwatch/timer with buzzer feature. Able to
count up from zero or down from an
entered time, the count is displayed in an
hour, minute, second format. While count-
ing, 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 down from the time
entered.
1. To count up from zero, press:
[Timer] [ Timer]
2. To count down, press [Timer], enter the
time from which the count will start,
then press [Timer] again.
[Timer] 1100 [Timer]
If you press [Off] while the timer is
running, the calculator beeps to indi-
cate the timer is still counting.
Pressing [Off] 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 divi-
sion 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
Finds the percent change between two
values. Press [=] to display answer.
Keystrokes Display
10 [Set] [%] 15 [=] 50.
100 [Set] [%] 25 [=] –75.
Square Root
Calculates the square root of a given
number.
Keystrokes Display
[144] [Set] [+] 12.
[100] [Set] [+] 10.
Set
+
√—
Set
%
10 – GradeMatic 4000
™