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Moving Back to the Main Screen:
To return to the main screen from any other screen, press 2
nd
Mode.
Error Prompts
Occasionally, the calculator will not understand a command and will return an
ERROR prompt. There is usually a description of the error, and sometimes there
is an option to GOTO the error so that it can be fixed. Often the correction is
easy, such as fixing an erroneous error in the WINDOW menu, or removing an
accidental user request to divide a quantity by 0.
Resetting the Calculator:
To reset the calculator, press 2
nd
+. Press 7. Press 1. The following screen
cautions that all data and all programs will be erased. To reset, press 2. To leave
the reset menu without resetting, press 1. Note: Resetting is a last resort option!!
Do NOT reset the calculator until all other options have been exhausted.
If there are no other options, programs stored in the calculator can be archived.
To do this press 2
nd
+ and select 5. Press ENTER. Now mark the program to
archive. Press PRGM and cursor down to the program to archive. Press
ENTER. An asterisk will appear next to the program name. When the calculator
is reset, the program will not be erased. To unarchive a program, press 2
nd
+ and
select 6. Now mark the program to archive. Press PRGM and and cursor down
to the program to unarchive. Press ENTER. The asterisk will disappear next to
the program name. A program may not be run until it has been unarchived.
Mode:
Press MODE to view the various entries on this menu. For this course, each line
should have the left-most entry highlighted. Occasionally, it will be necessary to
change the fifth line from CONNECTED to DOT.
Variable Key:
The calculator has one key for use in entering variables, the X key. This key is
located below the MODE key. No matter what variable is stated in the problem,
the calculator entry will be as x.
Store/Recall:
To store a number as a variable, press (number), STO>, ALPHA, (letter),
ENTER.
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