Real–Number
Functions
4–9
File name 32sii-Manual-E-0424
Printed Date : 2003/4/24 Size : 17.7 x 25.2 cm
Example:
Conversion with Vectors.
Engineer P.C. Bard has determined that in the RC circuit shown, the total
impedance is 77.8 ohms and voltage lags current by 36.5 º. What a .re the
values of resistance R and capacitive reactance X
C
in the circuit
?
Use a vector diagram as shown, with impedance equal to the polar
magnitude,
r,
and voltage lag equal to the angle,
θ
,
in degrees. When the
values are converted to rectangular coordinates, the
x
–value yields
R
, in ohms;
the
y
–value yields
X
C
,
in ohms.
R
C
R
X c
_
36.5
o
77.8 ohms
θ
Keys: Display: Description:
z
{
}
Sets Degrees mode.
36.5
_
. )
Enters
θ
, degrees of voltage lag.
77.8
)
_
Enters
r
, ohms of total impedance.
{
r
)
Calculates
x
, ohms resistance,
R
.
Z
. )
Displays
y
, ohms reactance,
X
C
.
For more sophisticated operations with vectors (addition, subtraction, cross
product, and dot product), refer to the "Vector Operations" program in
chapter 15, "Mathematics Programs"
Time Conversions
Values for time (in hours,
H
) or angles (in degrees,
D
) can be converted
between a decimal–fraction form (
H.h
or
D.d
) and a minutes–seconds form
(
H.MMSSss
or
D.MMSSss
) using the
z
s
or
{
t
keys.
