Combined device '' TT-3 ''.
Instruments for adjusting and controlling the PTA.The combined device "TT-3", possibly since 1960, has been produced by the Tartu Control Equipment Plant, Estonia. The multi-range combined device "TT-3" is designed to measure direct current and voltage, alternating voltage, and resistance. The dimensions of the device are 65x110x135 mm. Its weight is 700 gr. Power for resistance measurement is carried out from batteries 1.3 FMTs-0.25.
