Lecture no 2. instrumentations and measurement converted

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Comwave Institute of sarhad University. uncertainty calculation in sum, product, quotient, difference, power . Electromechanical Instruments

Engineering

Instrumentation and Measurements by David A Bell
Presented By: Engr. FAZAL UR REHMAN
Lecturer Electrical KPTEVTA
Visiting Lecturer COMWAVE INSTITUTE ISLAMABAD

Today's Topics
“ELECTROMECHANICAL INSTRUMENTS”
a) Some important Topics From past papers
b) Permanent Magnet Moving Coil Instrument
c) Galvanometer
d) DC Ammeter

Permanent Magnet Moving Coil
Instrument
 Current Flow in the coil is responsible for Deflecting
Force which move pointer from zero.
 Spiral spring at the pivot of pointer provides
Controlling Force which brings back the pointer to 0.
 Eddy current in the core of coil provide damping
force which dampen the oscillations of pointer.

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Lecture no 2. instrumentations and measurement converted

1. Instrumentation and Measurements by David A Bell Presented By: Engr. FAZAL UR REHMAN Lecturer Electrical KPTEVTA Visiting Lecturer COMWAVE INSTITUTE ISLAMABAD

2. Today's Topics “ELECTROMECHANICAL INSTRUMENTS” a) Some important Topics From past papers b) Permanent Magnet Moving Coil Instrument c) Galvanometer d) DC Ammeter

3. Some Exam Topics From

10.

11.

12.

13. Permanent Magnet Moving Coil Instrument  Current Flow in the coil is responsible for Deflecting Force which move pointer from zero.  Spiral spring at the pivot of pointer provides Controlling Force which brings back the pointer to 0.  Eddy current in the core of coil provide damping force which dampen the oscillations of pointer.

14.

15.

16.

17.

18.

19.

20.

21. Galvanometer

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24. DC Ammeter

25.