Voltommeter `` VOK-2 ''.
Instruments for adjusting and controlling the PTA.The VOK-2 voltommeter has been produced since 1955. The device is designed to measure AC and DC voltages in the frequency range from 50 to 1000 Hz. The voltage measurement range is from 1 to 450 V. The device can also measure resistance in the range from 1 ohm to 1 megohm. Measurement ranges are split into several limits.