The units can be used in verification and testing laboratories, at enterprises producing and repairing measuring instruments of electric power quantities and are designed for adjustment, calibration and verification of single-phase measuring instruments of active, reactive, total power and energy, measuring instruments of industrial frequency, effective values of voltage and current, phase angles and power factor, including "smart meters". Signal parameters are displayed on the built-in displays of the control unit and the reference meter, or on a PC using Test-SOFT software.
The units include: reference measuring instrument; error calculators; control unit; power amplifiers.
The unit can be equipped with: three-phase isolating current transformers, a unit for verification of accuracy of the verifiable measuring instruments, RS-485 interface for communication between the verifiable instruments and PC, relays with the function of protection of current circuits against breakage, BlueTooth interface for communication with PC, etc..
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