Calculated Industries GradeMatic 4000 Manual de usuario

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

◆Max # of Students per Class

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

™

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