Part A: A multi-range ammeter is required to measure the current in a certain network. A PMMC instrument has connected as an Ayrton shunt with a four resistor across PMMC. The resistance values are R1 = 0.0060, R2 = 0.0650, R3 = 4.00 and R4 %3D %3D %3D =10.00. The PMMC has Rm = 1kQ and FSD = 50µA. %3D a. Draw the circuit for the multi-range Ayrton shunt. b. Calculate the four current ranges of the ammeter. c. What is the main advantage of Ayrton shunt ammeter compared to parallel type. d. Briefly explain how this device can be calibrated.
Part A: A multi-range ammeter is required to measure the current in a certain network. A PMMC instrument has connected as an Ayrton shunt with a four resistor across PMMC. The resistance values are R1 = 0.0060, R2 = 0.0650, R3 = 4.00 and R4 %3D %3D %3D =10.00. The PMMC has Rm = 1kQ and FSD = 50µA. %3D a. Draw the circuit for the multi-range Ayrton shunt. b. Calculate the four current ranges of the ammeter. c. What is the main advantage of Ayrton shunt ammeter compared to parallel type. d. Briefly explain how this device can be calibrated.
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter30: Dc Motors
Section: Chapter Questions
Problem 6RQ: What is CEMF?
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