Testboy TV 441 Earth ground meter

The Testboy TV 441 earth resistance measuring device is used to check the resistance between the reference ground and the connection point of the earthing system. For measurement, an alternating current is fed between an auxiliary electrode and the electrode to be measured. With a probe which lies in the range of the reference ground of the electrode to be measured, the voltage drop is measured and the earthing resistance is determined (three-wire method). This text is machine translated.