what is a continuity tester
A continuity tester is an item of electrical test equipment used to determine if an electrical path can be established between two points; that is if an electrical circuit can be made. The circuit under test is completely de-energized prior to connecting the apparatus.The tester consists of an indicator in series with a source of electrical power-normally a battery, terminating in two test leads. If a complete circuit is established between the test-leads, the indicator is activated.The indicator may be an electric light or a buzzer.This led to the term buzzing out a circuit (which means to test for continuity) . Audible continuity buzzers or beepers are built into some models of multimeter.f a complete circuit is established between the test-leads, the indicator is activated. The indicator may be an electric light or a buzzer. This led to the term buzzing out a circuit (which means to test for continuity) .