Electronics Handbook/Measuring Devices/Ammeter

From Wikibooks, open books for an open world
Jump to navigation Jump to search

Ammeter[edit]

An ammeter is an electronic instrument used to measure current.

Zero-Center Ammeter.JPG

The ammeter's terminals must be in series with the current being measured. Ammeters have a small resistance (typically 50 ohms) so that they only have a small effect on the current.