UNI-T UT139C True RMS Digital Multimeter – 6000 Counts NCV Temperature Tester

UNI-T UT139C True RMS Digital Multimeter

The UNI-T UT139C is a professional True RMS digital multimeter featuring 6000-count resolution and smart auto-ranging for reliable electrical diagnostics across residential, commercial and light industrial applications. With 1000V AC/DC voltage, 10A AC/DC current, 60MΩ resistance, 60mF capacitance, 20MHz frequency, temperature measurement and NCV detection, this meter delivers comprehensive testing capability with CAT III 1000V safety rating. Its 3 readings/second response and large backlit LCD make it perfect for electricians working in tight spaces and low-light conditions across Sri Lanka.

The UT139C offers True RMS accuracy for non-linear loads, smart auto/manual ranging, MAX/MIN/REL modes, data hold, flashlight and sound/light alarm functions. The ergonomic design with rubber holster and 318g weight ensures comfortable handling during extended service calls. Ideal for troubleshooting distribution boards, HVAC systems, solar inverters and appliance repairs from Colombo apartments to factory maintenance in Katunayake.

Key Features of UNI-T UT139C Multimeter

• 6000-Count True RMS Accuracy High-resolution display with True RMS for accurate measurements on inverters, LED drivers and switching power supplies.
• NCV Non-Contact Detection Sound and light alarms identify live wires safely before probe contact, perfect for initial circuit assessment.
• Complete Measurement Suite 1000V AC/DC voltage, 10A AC/DC current, 60MΩ resistance, 60mF capacitance, 20MHz frequency and K-type temperature.
• Smart Auto/Manual Ranging Automatic range selection with manual override for precise control in professional diagnostics.
• Backlit Display + Flashlight Large illuminated LCD and built-in flashlight for clear readings inside DB boards and meter cabinets.
• Professional CAT III 1000V Safety Double insulation and overload protection suitable for mains wiring and light industrial environments.

Common Applications of UT139C in Sri Lanka

• Electrical Contractor Work Verify circuit loads, test insulation resistance and validate wiring installations in residential/commercial projects.
• HVAC System Service Measure compressor currents, control voltages, capacitor values and refrigerant pipe temperatures.
• Solar PV Troubleshooting Check inverter outputs, DC string voltages and AC grid connections in rooftop solar installations.
• Appliance Repair Shops Diagnose power supply faults, motor windings and control board electronics in household appliances.

Technical Specifications of UNI-T UT139C

• DC Voltage: 600mV~1000V ±(0.5%+2)
• AC Voltage (True RMS): 6V~750V ±(1.0%+3)
• AC/DC Current: 600μA~10A ±(1.0%+2)
• Resistance: 600Ω~60MΩ ±(0.8%+2)
• Capacitance: 6nF~60mF ±(3.0%+5)
• Temperature: −40°C~1000°C ±(1.0%+3)
• Display & Safety: 6000-count LCD | 318g | CAT III 1000V

What's in the Box?

• 1 x UNI-T UT139C True RMS Digital Multimeter
• 1 x Test Lead Set
• 1 x K-type Temperature Probe
• 2 x AAA Batteries (installed)
• 1 x Protective Holster
• 1 x User Manual

Downloads:
Ut139-series-data-sheet.pdf 1
Uni-t-ut139-series-manual.pdf 2