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The megohmmeter "IOM-3" (later "E6-2") was produced since 1963. It is intended for measurements of high-resistance electrical resistance of conductors and insulators in the range from 1 kΩ to 10.000 MΩ. The megohmmeter is powered by an alternating current network of 127 or 220 V of industrial frequency. Power consumption 40 watts. The device was produced in three versions. Photos by Oleg Volkov, Moscow.