50
Ammeters, Voltmeters and Ohmmeters
OBJECTIVES
In this chapter you will learn about:
- Difference between ammeters and voltmeters and how to connect them
- Accuracy of meters in terms of full-scale deflection
- Requirement of a shunt to bypass excess current
- Multi-range ammeters
- Calculation of the value of shunt for different currents
- Different methods of connecting shunts in multi-range ammeters
- Universal shunt and its significance
- Calculation of the value of universal shunt
- Ammeter loading and how to minimize its effect
- Requirement of multiplier to drop excess voltage
- Multi-range voltmeters
- Calculation of the value of multipliers for different ranges
- Different methods of connecting multipliers in multi-range voltmeters
- Voltmeter loading ...
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