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PICO | Data Loggers

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

The PicoLog MT03A is a precision USB-powered tester designed for low-resistance measurements in single-phase and three-phase motors, as well as earth-bond testing. It offers 10 µΩ resolution, ±0.5% accuracy, and complies with UN ECE R100 regulations, making it ideal for automotive, industrial, and renewable energy applications..

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  • Special Features
  • Specification

The PicoLog MT03A is engineered for professionals requiring accurate low-resistance measurements. It utilizes a 4-wire Kelvin connection to minimize contact resistance effects, ensuring precise readings. The device's auto-ranging capability allows it to measure resistances up to 2 Ω, making it versatile for various applications.

The included TA527 temperature probe ensures that measurements are automatically adjusted for temperature variations, enhancing accuracy in dynamic environments. The device's compact and durable design, combined with its USB connectivity, makes it suitable for both field and workshop settings.

Typical applications include testing electric vehicle (EV) components, HVAC systems, industrial machinery, and renewable energy systems, where low-resistance measurements are critical for performance and safety.

  • High Precision: Measures resistances as low as 10 µΩ with ±(0.5% + 100 µΩ) accuracy.

  • Temperature Compensation: Includes a TA527 wide-range temperature probe for automatic compensation.

  • Fast Testing: Performs complete three-phase motor winding resistance tests in under one minute.

  • Compliance: Supports earth-bond testing in line with UN ECE R100 standards.

  • Connectivity: Connects via USB 2.0 to Windows PCs (Windows 10 or 11, 64-bit).

  • User-Friendly Software: Comes with dedicated Windows software for intuitive control and data analysis.

  • Portable Design: Encased in a shock-resistant rubber boot with a hanging bracket for ease of use.

Feature Details
Resistance Measurement Range Auto-ranging up to 2 Ω
Resistance Resolution 10 µΩ
Resistance Accuracy ±(0.5% + 100 µΩ)
Temperature Measurement Range –40 to +125 °C (–40 to +257 °F)
Temperature Resolution 0.2 °C (0.36 °F)
Temperature Accuracy ±0.5 °C (0.9 °F)
Input Protection ±30 V
Dimensions 190 x 141 x 42 mm
Weight < 0.5 kg
Connectivity USB 2.0 (4.5 m cable supplied)
PC Requirements Windows 10 or 11 (64-bit)
Included Accessories 3 x Kelvin lead assemblies, TA527 temperature probe, MI168 "S" hook, MI121 USB cable, PA252 carry case