Calibration Of Ammeter Circuit Diagram. In this practical we will show you how to calibrate the ammeter using a potentiometer. The potentiometer is first standardized.
The standard resistance is connected in series with the ammeter which is to be calibrated. The main function of this device is to measure the flow of current with the help of a. It is connected in series because the flow of current within the series circuit is the same.
The voltage drop across the standard resistance is measured by a potentiometer.
The ratio p q should a always be kept equal to p q. Keep q q 1000 ohms and s 1 ohm. Series multiplier resistors are used to give voltmeter movements higher range and parallel shunt resistors are used to allow ammeter movements to measure currents beyond their natural range. We are required to calibrate the ammeter to know about its errors and adjust it to get near to ideal readings.
