HIOKI 3157-01 AC Grounding HiTester
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Benefits of the 3157-01 Protective Ground Tester for Standards Certification
- Ground bond safety tester in compliance with international safety standards and laws.
- 0 to 1.8 Ω measurement, testing current up to 31 A.
- Feedback control system: Stable current even with a fluctuating load.
HIOKI 3157-01 AC Grounding Tester
The Hioki 3157 is an AC ground bond tester. The device is used for protection circuit testing of a wide range of electrical equipment, including industrial machinery, medical equipment, and measuring instruments using a constant current system, enabling it to provide stable output current.
- AC grounding/protective ground tester.
- 0 to 1.8 Ω measurement.
- Testing current up to 31 A, for 100 to 120 or 200 to 240 VAC.
- Easily perform protective continuity testing in compliance with international safety standards and laws:
- Protective continuity resistance measurement for medical devices and general electrical devices).
- HGround connectivity testing when installing electrical machine tools and distribution panels.
- Testing of protective grounding and isopotential grounding work for medical equipment.
- Evaluation of contact status using large currents.
- Feedback control system that is capable of applying a stable current even with a fluctuating load.
- Soft-start function that checks the connection to the device under test before applying the current.
Model Overview
Model | HIOKI 3157-01 |
Basic functions | AC 4-terminal method resistance measurement |
Display | Fluorescent tube (digital display) |
Current setting range | 3.0...31.0 AAC (0.1 A resolution), into 0.1 Ω load |
Max. output power | 130 VA (at output terminals) |
Open-terminal voltage | Max. 6 VAC |
Generator frequency | 50...60 Hz sine wave (selectable) |
Resistance measurement | 0...1.800 Ω (0.001 Ω resolution), accuracy: ±2% rdg. ±4 dgt. after zero-adjust |
Voltage measurement | 0...6.00 VAC (single range 0.01 V resolution), accuracy: (1% rdg. +5 dgt.) |
Monitor section | 0...35.0 AAC/0...6 VAC, refresh rate: 2 times/s |
Timer display | Counts down time after start until preset time, shows elapsed time after start |
Timer setting | 0.5...999 s |
Comparator | PASS/FAIL evaluation using preset upper/lower limit, buzzer sound, signal output |
Memory function | Max. 20 settings (with save/load) |
Interfaces | EXT I/O, EXT SW, option: GPIB or RS232C |
Power supply | 100...120 V/200...240 VAC (switching, 50/60 Hz) |
Dimensions (mm) | 320 x 90 x 263; 7 kg |
Required additional (optional) probes | 2x current probe 9296, or 1x current probe 9296 and 1x current apply probe 9297, depending on measurement application |
Included: HIOKI 3157, power cord, instruction manual, spare fuse (inlet), 2x shorting bar.
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