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The 3157-01 AC GROUNDING HiTESTER is designed to measure whether the metal enclosure of an 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.
Key Features
External I/O
The unit comes with I/O connectors as standard equipment. The connectors allow external START/STOP control, READY/TEST status checking, and PASS/FAIL result reading. Photocouplers are used to isolate the I/O signals from the internal circuitry.
External interface (option)
The 9518-02 GP-IB interface or 9593-02 RS-232C interface can be installed in the unit. This allows remote control from a computer as well as export of measurement data. The 9593-02 RS-232C interface also allows connection of the 9442 printer for producing a hard copy of measurement data.
Key Benefits
The 3157-01 passes a large AC current through the measurement object and measures the voltage drop according to the AC 4-terminal method, making it possible to measure very low resistance values.
Protective grounding checks of medical and general electrical equipment
Ground connection tracing of machine tools and wiring panels
Safeguard and equal-potential connection checks of medical installations
High-current behavior evaluation of connections
Trust the Experts at ACA TMetrix Inc.
ACA TMetrix Inc. is a leading Canadian distributor of test and measurement instruments and design tools. For over 55 years we have provided products manufactured by the world’s leading instrument manufacturers. Leading Distributor of Design Tools and Test Equipment in Canada.
Specifications
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
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
