HIOKI FT6380-50 Clamp Earth Tester | No auxiliary ground rods, 0.20–1600 Ω, leakage current 20.00 mA–60.0 A, CAT IV 600 V, optional Z3210 Bluetooth

HIOKI FT6380-50 Clamp Earth Tester: No Auxiliary Ground Rods, Measures Earth Resistance and Leakage Current

Overview

The FT6380-50 measures earth resistance simply by clamping around the ground wire, with no auxiliary ground rods to drive and no need to disconnect the ground wire; this method applies to multi-grounded systems. The same instrument also measures leakage current and load current. The FT6380-50 is the successor to the discontinued FT6380 and FT6381.

Key Specifications

• Earth resistance: 0.20 Ω (resolution 0.01 Ω) to 1600 Ω (resolution 20 Ω), 10 ranges; ±1.5% rdg. ±0.02 Ω.
• AC current: 20.00 mA (resolution 0.01 mA) to 60.0 A, 5 ranges; ±2.0% rdg. ±0.05 mA (30–400 Hz, true RMS).
• Safety and protection: AC 600 V CAT IV; IP40 with jaws closed.
• Wireless: Z3210 is optional (the FT6380-90 includes the Z3210 and is sold only in Japan and HIOKI's European region).
• Power and weight: Approx. 40 h continuous use (without Z3210); approx. 620 g.

Applications

• Earth resistance inspection of multi-grounded systems at buildings and cell sites.
• Tracing leakage current on ground wires.

Specifications per the HIOKI product page (retrieved 2026-10-20).