The UNI-T UT582+ Digital RCD Tester is designed for accurately testing the functionality of residual current devices (RCDs) in single-phase circuits. It supports a wide range of test currents, including 10mA to 500mA, and offers precise voltage measurements between 30V and 600V. The device features automatic ramp testing, data hold, and several safety indicators like mis-operation and disconnection buzzers. It’s a reliable tool for ensuring electrical safety in residential and commercial installations.