Overview

Enviro Test Construct’s high-current contact resistance measurement tester is designed to evaluate the conductivity condition of switch conductive circuits by accurately measuring contact and circuit resistance. It supports reliable safety assessment of switches by applying high test currents to minimize data dispersion caused by contact impurities or surface oxidation. The instrument enables fast, stable, and repeatable measurements for switch contacts, conductive circuits, cables, wires, and welded joints under demanding field and laboratory conditions.

Features

High test current output fully meets national requirements related to contact resistance testing
High-precision constant current power supply delivers 50 A or 100 A without manual adjustment for rapid and accurate testing
Four-terminal connection effectively eliminates test lead resistance influence on measurement results
Fast testing speed with RS232 interface for PC connection and data upload
Designed for long-duration operation with integrated overheat protection for stable and reliable performance
Simple operation with lightweight construction for ease of use

Technical Specifications

Test Current	50 A or 100 A
Testing Range	1 μΩ to 3000 μΩ at 50 A
Minimum Resolution	0.01 μΩ
Accuracy	0.5% ± 0.5 μΩ
Output Voltage	Maximum 5 V
Consumed Power	≤ 500 W
Power Supply	AC 220 V ±10%, 50 Hz
Operating Temperature	-4 °F to 104 °F (-20 °C to 40 °C)
Relative Humidity	≤ 80% RH, non-condensate
Weight	11.02 lb (5 kg)