Megger DET3 digital ground resistance meter measures ground resistance, voltage, and current for digital ground and bond testing.The DET3TC is capable of testing on-site grounds without disconnecting the utility connection. The unit measures digitally, is autoranging, and has user-selectable 25 or 50V test voltages. The noise rejection feature filters out noise up to 40V peak to peak for more accurate testing in high-noise environments. The meter measures voltage from 0 to 100V, ground current from 0.5mA to 19.9A, and ground resistance from 0.01 to 2000 ohms.