Hioki 3157-01AC Grounding HiTester

Designed to measure whether the metal enclosure of electrical equipment is connected to the ground terminal at sufficiently low resistance levels. It also can be used to evaluate the grounding conditions of large-scale electrical installations. Measurement is carried out by using a high current according to the specifications of the measurement object, and determining the voltage drop at the measurement point. Reference values are as set out in the various safety standards. The 3157-01 can carry out measurements in accordance with the stipulations of multiple standards.

Specifications
Measurement items	Low resistance, AC 4-terminal method
Generator section	Current generator principle:PWM constant current control Current setting range: 3.0 A to 31.0 A (0.1 A resolution), into 0.1 Ohm load Maximum output power: 130 VA1 (at output terminals) 1 Subject to derating according to ambient temperature (80 % at 40 ‹C) Frequency: 50 Hz or 60 Hz sine wave Soft start function: Apply current only after checking load connection
Monitor section	Resistance measurement:0 to 1.800 Ohm (0.001 Ohm resolution) Accuracy: ±2 % rdg. ±4 dgt. (after zero-adjust) Current monitoring range: 0 to 35.0 A AC (0.1 A resolution) Monitoring cycle: 2 times/second
Other functions	Timer setting:Counts down time after start until preset time, or shows elapsed time after start Setting range: 0.5 to 999 second Comparator: Pass/Fail evaluation using preset upper/lower limit, I/O output Memory function: max. 20 settings (with save/load)
Display	Fluorescent tube digital display
Power supply	100 to 120 V, 200 to 240 V AC (auto-switching), 50/60 Hz
Dimensions, mass	320 mm(12.60 in)W × 90 mm(3.54 in)H × 263 mm(10.35 in)D, 7 kg (246.9 oz)

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