Pole checker

Pole testers are simple, usually handy test devices for determining the polarity of electrical voltages or magnetic fields . This also indicates that there is an electrical voltage or a magnetic field at all.

Electric pole tester

An electrical pole tester is a very simple, two-pole test device for displaying the polarity of a voltage . It shows where the positive ( + ) or negative ( - ) polarity is present at 2 points of a voltage source or an electrical device to be compared .

A clear display of the polarity requires the presence of a direct voltage , i.e. H. polarity unchanged over the (short) test time.

A simple functional principle for a pole tester is one or two light-emitting diodes that are connected in series with a series resistor to limit the current.

In a language that is not applicable, 'pole testers' also mean phase testers or (two-pole) voltage testers , the latter can include a pole tester.

Magnetic pole tester

Checking the polarity of a magnetic plate with a magnetic pole tester . Depending on the polarity direction lights (according to the simple rule of thumb "N in this a green or red LED to o rdpol r o t, S ü Dpol gr ü n")

The alignment of magnetic fields can be determined with a magnetic pole tester . Simple magnetic pole testers have a mechanical principle (small magnet, spring).
Purely electronic testers are more modern.

Web links

• Circuit diagram for an electrical pole tester
• Data sheet of a magnetic pole tester (PDF; 147 kB)

Individual evidence

1. ↑ Electronics. 1st exercise: Pole tester (plug-in system). i-physics.de ( Memento from October 6, 2009 in the Internet Archive ).