Hioki FT6380-50 – Clamp-On Earth Tester

• Earth resistance measurement for multi-grounded systems
• Measure leak current with highly sensitive 0.01 mA resolution (at 20.00 mA range)
• Measure load current up to 60.0 A range
• Clamp at the narrowest point
• Wireless functionality requires option Z3210; see Accessories on this page

The FT6380-50 measures grounding resistance simply by clamping to multiple-grounded ground wires. No auxiliary grounding rod is needed, and there is no need to disconnect the ground wire from the grounding rod. The compact, low-profile sensor can be used to clamp ground wires with ease and also provides AC current measurement functionality and can measure currents ranging from leakage current on the order of several mA to load currents of up to 60 A.

Clamp on the earth cable. The instrument has two cores for voltage injection and current measurement.

1. The voltage transducer injects a defined voltage into the multi-grounded system.

2. From the defined voltage and measured current, the total circuit loop resistance is calculated in the following equation.

Rx + 1/ [ (1/R1) + (1/R2) + (1/R3) + (1/R4) + … ] = V/I

In a typical multi-grounded system, the parallel resistance value is small enough to be ignored and the equation as referred on the left can be simulated as follows.

Rx = V/I

The slim 0.79-inch (20mm) jaws let you finish your job easily and efficiently.

Set the alarm to audibly and visually notify yourself that the resistance or current value exceeds the threshold.

Well-designed magnetic shields eliminate the leakage flux between the two cores that often affect measurement accuracy.

With the bright back light, you can easily read the measurement value even in dark locations.

You can store up to 2,000 measurement values in the field and recall them in your office later.