Welcome to electrical and electronics engineering discussion website, Please login or register to continue.

Describe procedure for calibration of ammeter with diagram.

Your answer

Thanks for your contribution. Feel free to answer this question. Please avoid short answer. Your answer is most welcome. Be genuine.

Upload image or document:

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
Are you a robot ? (Y = Yes / N = No)
To avoid this verification in future, please log in or register.

1 Answer

0 votes

Procedure for Calibration of Ammeter: 

In this method, DC potentiometer is used for measurement of voltage across a standard low resistance. 

• Connect the circuit as shown in the figure, the ammeter to be calibrated is connected in series with standard resistance and regulating resistance Rg. 

• By varying Rg, voltage across potentiometer (S) is measured. Before measurement potentiometer is required to be standardized. At the same time current through ammeter is also measured (I). i.e. reading of ammeter under calibration. The sub-standard or calibrated meter and meter under test are connected in series and readings are noted for corresponding currents.


• At each step, true value of ammeter is calculated as, 

where, Vs = Voltage across potentiometer S = resistance of potentiometer 

And the currents are compared for finding out error in ammeter.

Welcome to Q&A site for electrical and electronics engineering discussion for diploma, B.E./B.Tech, M.E./M.Tech, & PhD study.
If you have a new question please ask in English.
If you want to help this community answer these questions.