ISOTEST2010 makes it possible to check the integrity of the ground wires and connection to neutral according to standard VDE 0413/4. test of electrical conductivity it is carried out with the test current 200 mA, checking isolation is carried out during the stress of test from 50[V] to 1000[V] and the resistance to 2[G]. Basic functions of the instrument: Checking the integrity of the ground wires and connection to neutral with 200 mA and the stress of test from 4 to 24[V]. Checking insulation resistance with 50V, 100V, 250V, 500V and 1000V direct currents. Record of the obtained results. Built-in interface RS232.