AC GROUNDING HiTESTER
3157

Overview
Specifications
Catalogs
User Guide
The Hioki 3157 is an AC ground bond tester designed 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.
Key Features • Easily perform protective continuity testing in compliance with international safety standards and laws -1) Protective continuity resistance measurement for medical devices and general electrical devices -2) Ground connectivity testing when installing electrical machine tools and distribution panels -3) Testing of protective grounding and isopotential grounding work for medical equipment -4) 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 No. (Order Code)
![]()
|
Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)
Basic functions | AC 4-terminal method resistance measurement |
---|---|
Display | Fluorescent tube (digital display) |
Current setting range | 3.0 A to 31.0 A AC (0.1 A resolution), into 0.1Ω load |
Max. output power | 130 VA (at output terminals) |
Open-terminal voltage | Max. 6 V AC |
Generator frequency | 50 Hz or 60 Hz sine wave (selectable) |
Resistance measurement /span> | 0 to 1.800 Ω (0.001 Ω resolution), Accuracy: ±2% rdg. ±4 dgt. after zero-adjust |
Voltage measurement | 0 to 6.00 V AC (single range 0.01 V resolution), Accuracy: (1 % rdg. +5 dgt.) |
Monitor section | 0 to 35.0 A AC/ 0 to 6 V AC, Refresh rate: 2 times/s |
Timer display | Counts down time after start until preset time, Shows elapsed time after start |
Timer setting | 0.5 s to 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, GP-IB or RS-232C (option) |
Power supply | 100 to 120 V/200 to 240 V AC (switching, 50/60 Hz) |
Dimensions and mass | 320 mm (12.60 in)W × 90 mm (3.54 in)H × 263 mm (10.35 in)D, 7 kg (246.9 oz) |
Accessories | Power cord ×1, Instruction Manual ×1, Spare fuse (inlet) ×1, Shorting bar ×2 |
Catalog: AC GROUNDING HiTESTER 3157 | Download PDF [1MB] | English |
Introducing the safety standards, testing methods, and appropriate test instruments for electrical medical equipment | Download PDF [1MB] | English |