These definitions provide a basis on which the calibration of amperemeters can be conducted.
The accuracy of a meter is tested by drawing calibration curves showing the percentage departure from absolute accuracy in its reading for various decimal fractions of full load.
After this event the Calibration Curve.
The calibration of ammeters is best conducted by means of a series of standard low resistances and of a potentio meter.
This can be determined by a direct calibration, by inserting a known quantity of water at a known temperature and observing the contraction, or weighing the mercury drawn into the apparatus.