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HP 9g graphing calculator Manual

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Chapter 1 : General Operations
Power Supply
Turning on or off
To turn the calculator on, press [ ON ].
To turn the calculator off, press [ 2nd ] [ OFF ].
Battery replacement
The calculator is powered by two alkaline button batteries (GP76A or LR44).
When battery power becomes low, LOW BATTERY appears on the display.
Replace the batteries as soon as possible.
To replace the batteries:
1. Remove the battery compartment cover by sliding it in the direction of
the arrow.
2. Remove the old batteries.
3. Install new batteries, each with positive polarity facing outward.
4. Replace the battery compartment cover.
5. Press [ ON ] to turn the power on.
Auto power-off function
The calculator automatically turns off if it has not been used for 9–15
minutes. It can be reactivated by pressing [ ON ]. The display, memory,
and settings are retained while the calculator is off.
Reset operation
If the calculator is on but you get unexpected results, press [ MODE ] or
[
CL
/
ESC
]. If problems persist, press [ 2nd ] [ RESET ]. A message appears
asking you to confirm that you want to reset the calculator.
RESET : N Y
Press [ ] to move the cursor to Y and then press [ ]. The calculator
is reset. All variables, programs, pending operations, statistical data,
answers, previous entries, and memory are cleared. To cancel the reset
operation, move the cursor to N and press [ ].
If the calculator becomes locked and pressing keys has no effect, press
[ EXP ] [ MODE ] at the same time. This unlocks the calculator and
returns all settings to their default values.
Contrast Adjustment
Press [ MODE ] and then [ ] or [ ] to make the screen lighter or
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