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Práctica 5
Medidas y representación de magnitudes eléctricas con osciloscopio
Objetivos
El objetivo es aprender a utilizar el osciloscopio para analizar magnitudes senoidales, comparando dos magnitudes senoidales y viendo sus desfases.
Fundamento teórico y montajes
El osciloscopio es un instrumento muy utilizado, representa una imagen cualitativa y cuantitativa de cualquier magnitud que se pueda representar mediante una tensión.
El montaje que realizamos fue el siguiente:
Canal I
A cos ð W
0 5 A R
V Canal II
V
U W
N R S T
Tensión Canal II Vmax = Ks . Kat . nº div [=] 10.V/div. div [=] V
V= Vmax/ 2
Intensidad Canal I V i max = Ks. Kat. Nº div [=]1.V/div. div [=] V
Imax = Vi max/R
I = Imax/ 2
T = Periodo T= Kbt. Nº div [=] s/ div . d [=] s
f = Frecuencia f = 1/T [=] 1/s [=] Hz
ð = Desfase ð = (1 div/ 10 div) 360º
cos ð = Factor de potencia
P = Potencia activa P = V. I. cos
La tensión que colocamos en el circuito es de 100 V, la resistencia del circuito amperimétrico es de 0,85 .
Colocamos una intensidad de 1 A.
La atenuación de la sonda del canal II es x10 y el canal I no va a tener atenuación.
Colocamos en el decalador los siguientes factores de potencia: 1, 0,6 (ind) y 0,6 (cap) y 0.
Material necesario
Fuente de tensión corriente alterna variable
Fuente de intensidad corriente alterna variable
Osciloscopio con sondas
Resistencia
Decalador de fases
Vatímetro
Fasímetro
Amperímetro
Voltímetro
Resultados obtenidos
Tensión
Intensidad
Periodo
Frec
Vmax
V
(V)
Vi max
Imax
(A)
I
(A)
Div
Kbt
T
(s)
F
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Enviado por: Arual Idioma: castellanoPaís: España