Calibration Of Ammeter Circuit Diagram. The connections are made as shown in the figure 2. Calibration of ammeter voltmeter and wattmeter using potentiometer.
For calibration of ammeter necessary circuit diagram is shown in figure. The below mention formula determines the current through the standard resistance. The variable dc supply source is adjusted at any current value so that the pointer coincides exactly with a major division of the ammeter.
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In secondary circuit positive terminal of standard cell ε s is connected at point a high potential end while negative terminal is connected with the terminal 1 of two way key. Article by circuit digest. The variable dc supply source is adjusted at any current value so that the pointer coincides exactly with a major division of the ammeter. The ratio p q should a always be kept equal to p q.
