UNI-T UT521 Digital Earth Testers

e UNI-T UT521 Digital Earth Tester is a reliable and user-friendly instrument designed for accurate earth resistance measurements in various electrical systems. It supports both 2-wire and 3-wire testing methods, making it versatile for different grounding setups. This flexibility allows for precise measurements in power distribution systems, lightning protection installations, and general electrical equipment grounding.

Key features of the UT521 include a manual range selection, enabling users to set measurement ranges according to specific testing requirements. The device is equipped with a data hold function, allowing users to freeze the displayed measurement for convenient reading and recording. An LCD backlight ensures visibility in low-light conditions, and the auto power-off feature conserves battery life by turning off the device after a period of inactivity.

The UT521 is designed with double insulation protection, enhancing user safety during operation. It also provides clear indications for poor contact and over-range situations, displaying “…Ω” and “OL” respectively, to alert users of measurement issues. A low battery indication ensures that users are aware when the battery needs replacement, preventing unexpected power loss during critical measurements.