This item is a great condition used Multi-Amp M400 100A Micro-Ohmmeter CAT # 830250. Calibrated to NIST traceable standards on June 3rd, 2025. Includes rigid shipping case, large red/black current test leads with clamps, small red/black voltage test leads with clips, standard power cable, traceable certificate of calibration, and 180 day warranty. All pictures are of the actual unit and accessories.
This item comes with a 6 Month (180 day) warranty. Every pre-owned unit we offer goes through meticulous inspection and NIST calibration to guarantee its reliability and durability.
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Multi-Amp M400 100A Micro-Ohmmeter CAT # 830250 NIST Calibrated 100A Micro Ohm
The M-400 100 Ampere Digital Micro-Ohmmeter is designed to measure the resistance of contacts on busbars and breakers. The measurement is made at a high current, typically 100 amperes, using a ratiometric circuit.
This line-powered instrument employs a current regulating circuit to stabilize the test current against line voltage fluctuations and changes in the resistance of the test loop. The use of line voltage as a power source eliminates the need to charge and maintain a heavy battery pack.
Model M-400 is compact because of its short time rating on the high-current output ranges. The meter reads directly in micro-ohms or milliohms. A three-position switch is provided so the operator can select the optimum resolution and measuring range.