PRELIMINARY EXERCISEImportant Note: You are required to do this exercise BEFORE the lab session.a. Explain what is loading effect in measurement.b. Draw the connection using the potentionmeter shown in Figure(i) as a voltage divider.c. The resistance value in Figure (i) are R₁ = 5 k2, R₂-5 k2 and R, -5 k2 respectively. Calculatethe error of Moving Coil Meter if it has internal resistance 10 k2 and voltage supply (Vs) is10V.mFigure (i)d. Discuss the error in voltage measurement between low and high resistance circuit.e. Briefly discuss the difference between a logarithnm and linear track.f. Explain the input and output impedance of buffer circuit. What are the functions of buffer ininstrumentation and measurement.

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a. Explain what is loading effect in measurement.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Concept explainers

Power Measurement

According to Blondel's theorem, the total power is measured with one less number of wattmeters than the number of wires present in the system. So, a single-phase and two-wire system will require one wattmeter and a single-phase and the three-wire system will require two wattmeters, and a three-phase and the three-wire system will also require two wattmeters and a three-phase and the four-wire system will require three wattmeter devices. The wattmeter is a device that measures power using one voltage and one current input as shown in the above figure. Multiple current or voltage input pair cables are used by many power analyzers and digital storage oscilloscopes (DSOs) for measuring watts, in effect within a single instrument acting as multiple wattmeters. It is possible to measure three-phase and four-wire power with one correctly specified power analyzer.

Question

PRELIMINARY EXERCISE
Important Note: You are required to do this exercise BEFORE the lab session.
a. Explain what is loading effect in measurement.
b. Draw the connection using the potentionmeter shown in Figure(i) as a voltage divider.
c. The resistance value in Figure (i) are R₁ = 5 k2, R₂-5 k2 and R, -5 k2 respectively. Calculate
the error of Moving Coil Meter if it has internal resistance 10 k2 and voltage supply (Vs) is
10V.
m
Figure (i)
d. Discuss the error in voltage measurement between low and high resistance circuit.
e. Briefly discuss the difference between a logarithnm and linear track.
f. Explain the input and output impedance of buffer circuit. What are the functions of buffer in
instrumentation and measurement.

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