USB Milliohm, Earth Bond, Single & 3 Phase Motor Tester

Data Logger
MT03A

Product Description

MT03A is a high-precision USB milliohm, earth bond, and motor tester designed for low-resistance measurements in industrial, automotive, energy, and maintenance applications. Capable of testing single-phase and three-phase motor windings in under one minute, it delivers accurate, temperature-compensated results with 10 µΩ resolution and advanced Kelvin measurement technology. With USB connectivity, dedicated Windows software, and compliance with UN ECE R100 earth bond testing requirements, the MT03A provides a fast, reliable solution for motor diagnostics, grounding verification, and low-resistance testing

Available Models

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USB Milliohm, Earth Bond, Single & 3 Phase Motor Tester

Model specification

Specification Value
Resistance measurement range Autoranging up to 5 Ω
Resistance resolution 10 µΩ
Resistance accuracy (typical) ±(0.5% + 100 µΩ)
Input protection ±30 V
Weight <0.5 kg
Dimensions 190 x 141 x 42 mm
Connection USB (USB-A (2.0) cable 4.5 m and USB-C® (3.1) cable 4.5 m cable supplied)
PC requirements Windows 10 or 11 (64-bit application)
Temperature accuracy (typical) ±0.5 °C (0.9 °F)
Temperature resolution 0.2 °C (0.36 °F)

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