hp 9s
Scientific Calculator
General Operations
Power Supply
On or Off
To turn the calculator on, press [ON/C].
To turn the calculator off, press [2ndF] [OFF].
Auto power-off function
The calculator automatically turns off if it has not been used for
approximately 9 minutes. Power can be restored by pressing the
[ON/C] key again. Memory contents and the current mode setting
(STAT, DEG, CPLX, Base-n,etc) are retained when you turn off the
power and when the calculator automatically turns off.
Battery replacement
The calculator is powered by two alkaline button batteries (GP76A or
LR44). If the display becomes dim and difficult to read, the batteries
should be replaced as soon as possible.
To replace the batteries:
1.
Slide the battery cover off and remove the old batteries.
2.
Insert new batteries, with positive polarity facing outward.
3.
Replace the battery cover and press [ON/C] to turn on the power.
The keyboard
Most of the keys can perform two functions.
–1
sin
2nd function ― ― ― ― ― ―
sin
1st function ― ― ―
1st functions
These are functions that are executed when you press a key without
first pressing [ 2ndF ]. The function performed is indicated by the label
on the key.
2nd functions
These are functions that are executed when you press a key after first
pressing [ 2ndF ]. The function performed is indicated by the label
above the key.
When you press [ 2ndF ], the 2ndF indicator appears in the display to
indicate that you will be selecting the second function of the next key
you press. If you press [ 2ndF ] by mistake, simply press [ 2ndF ]
again to remove the 2ndF indicator.
Note: [ A ], [ B ], [ C ], [ D ], [ E ], [ F ] are 1st functions in HEX mode.
Display Symbols
The following symbols, shown on the display, indicate the status of
the calculator.
DEG or RAD or GRAD: degrees, radians or grads angular unit
M
A value is in memory
CPLX
Complex number mode
E
Overflow or error
STAT
Statistical mode
–
Minus
2ndF
[2ndF] key pressed
( )
Parentheses calculation
CP
Precision capability
BIN
Binary mode
CPK
Process capability
OCT Octal mode
σ
Deviation
HEX Hexadecimal mode
USL
Setting upper limit
ED
Edit mode
LSL
Setting lower limit
HYP Hyperbolic mode
Display Formats
The calculator can display numbers in four formats: floating point,
fixed point, scientific, and engineering.
Floating point format
The floating point format displays numbers in decimal form, using up
to 10 digits. Any trailing zeros are truncated.
If the result of a calculation is too large to be represented by 10 digits,
the display automatically switches to scientific format. If the result of a
later calculation is small enough to be displayed in less than 10 digits,
the calculator returns to floating point format.
To set the display to floating point display format:
DEG
0.
4.
Press [ 2ndF ] [ FIX ] [ • ]
Fixed point format
The fixed point, scientific, and engineering formats use a fixed
number of decimal places to display numbers. If more than the
specified number of decimal places is keyed, the entry will be rounded
to the correct number of decimal places.
Ex. 1: Fix the display at 2 decimal places, then key in 3.256
DEG
1.
Press [ 2ndF ] [ FIX ] 2
0.00
DEG
2.
Key in 3.256 [
]
3.26
ENTER
If fewer than the set number of decimal places is keyed, the entry will
be padded with trailing zeros.
Ex. 2: Fix the display at 4 decimal places, then key in 4.23
DEG
1.
Press [ 2ndF ] [ FIX ] 4
0.0000
DEG
2.
Key in 4.23 [
]
4.2300
ENTER
Scientific format
05
In scientific format, the number 891500 is shown as 8.915 × 10
,
where 8.915 is the mantissa and 5 is the exponent of 10.
Ex. 3: To display 7132 × 125 in scientific format:
DEG
1.
Key in 7132 [ × ] 125 [
]
891500.
ENTER
DEG
05
8.915
2.
Press [ F ← → E ]
You can convert an entry to scientific notation by pressing [EXP] after
entering the mantissa.
5
Ex. 4: Key the number 4.82296 × 10
DEG
05
1.
Key in 4.82296 [ EXP ] 5
4.82296
Engineering format
Engineering format is similar to scientific format, except that the
mantissa can have up to three digits to the left of the decimal and the
exponent is always a multiple of three. This is useful if you have to
3
convert units that are based on multiples of 10
.
Ex. 5: Convert 15V to 15000mV (V = Volts)
DEG
1.
Key in 15
15.
DEG
– 03
15000.
2.
Press [ ENG ] twice.
Ex. 6: Convert 15V to 0.015KV (V = Volts)
DEG
1.
Key in 15
15.
DEG
03
0.015
2.
Press [ 2ndF ] [ ← ] [ 2ndF ] [ ← ]
Order of Operations
Each calculation is performed in the following order of precedence:
1.
Operations in parentheses.
2.
Functions that require pressing the function key before entering a
value, for example, [ DATA ] in statistics mode, and [ EXP ].
3.
Functions that require values to be entered before pressing the
–1
–1
–1
function key, for example, cos, sin, tan, cos
, sin
, tan
, log, ln,
2
–1
3
x
, x
, √ , π ,
√ , x!, %, RND, ENG,
,
, and the unit
conversion functions.
4.
Fractions.
5.
+/–
y
X
6.
x
,
√
7.
nPr, nCr
8.
×, ÷
9.
+, –
Corrections
If you have made a mistake when entering a number and you have
not yet pressed an arithmetic operator key, just press [ CE ] to clear
the last entry. You can then input the desired number again.
Alternatively,you can delete digits one at a time by pressing the
backspace key: [ 00 → 0 ].