UNI-T UT139C True Rms Digital Multimeter

UNI-T UT139C True Rms Digital Multimeter

The UNI-T UT139C is a professional-grade True RMS digital multimeter designed for technicians and field engineers who require reliable measurements across a wide spectrum of parameters. It features a 6000-count LCD display, robust safety design (CAT III 600 V), and broad functionality including AC/DC voltage and current up to 600 V/10 A, resistance, capacitance, frequency, duty cycle and temperature.
Additional features such as Non-Contact Voltage (NCV) detection, back-lit display, REL/Δ measurement, MIN/MAX, data hold, auto power off, and rubber holster make it suitable for on-site electrical maintenance, automation work and demanding environments.

Key specifications include:

• True RMS measurement on AC signals, improving accuracy on non-sine-wave loads.

• Measurement capabilities:

  • DC Voltage: up to 600 V (ranges: 60 mV/600 mV/6 V/60 V/600 V) with accuracy ±(0.5% + 2).

  • AC Voltage: up to 600 V with accuracy ±(0.8% + 3).

  • DC/AC Current: up to 10 A.

  • Resistance: up to 60 MΩ (depending on model) with accuracy around ±(0.8% + 2).

  • Capacitance: up to ~100 mF with ±(4% + 5) accuracy.

  • Frequency: 10 Hz to 10 MHz with ±(0.1% + 4) accuracy.

  • Temperature measurement: approx. -40 °C to +1000 °C for the UT139C.

    – DC Voltage: 600mV / 6V / 60V / 600V, Accuracy: ±(0.5%+2)
    – AC Voltage: 6V / 60V / 600V, Accuracy: ±(0.8%+3)
    – DC Current: 600µA / 6000µA / 60mA / 600mA / 6A / 10A, Accuracy: ±(0.8%+2)
    – AC Current: 600µA / 6000µA / 60mA / 600mA / 6A / 10A, Accuracy: ±(1%+3)
    – Resistance: 600Ω / 6kΩ / 60kΩ / 600kΩ / 6MΩ / 60MΩ, Accuracy: ±(0.8%+2)
    – Capacitance: 9.999nF / 99.99nF / 999.9nF / 9.999µF / 99.99µF / 999.9µF / 9.999mF / 99.99mF, Accuracy: ±(4%+5)
    – Frequency: 10Hz ~ 10MHz, Accuracy: ±(0.1%+4)
    – Temperature: -40°C ~ 1000°F, Accuracy: ±(1%+3)
    – Temperature: -40°F ~ 1832°F, Accuracy: ±(1.5%+5)
    – Input Protection: 600V rms
    – Input Impedance for DCV: 1 GΩ max.
    – Power: 2x 1.5V AA
    – LCD Size: 58mm x 36mm
    – Product Net Weight: 370 g
    – Product Size: 180mm x 87mm x 47mm
    Warranty: 1 Year

This meter therefore offers a wide-ranging feature-set that’s well suited to electric-power systems, automation, general instrumentation, and maintenance tasks. With its robust build, safety category and enhanced features like NCV and temperature probe included, it’s a solid choice for professionals.