The UT139C is a true RMS handheld multimeter in the UNI-T UT139 series, designed for electricians, equipment maintenance, HVAC commissioning, and electrical engineering personnel.
It supports auto/manual ranging and can measure AC/DC voltage, AC/DC current, resistance, capacitance, frequency, duty cycle, continuity, diode, temperature, and NCV non-contact voltage detection. It also features VFC/VFD variable frequency measurement, suitable for on-site variable frequency equipment and routine electrical troubleshooting.
Core Features
- Weight: approx. 354g (net) / 370g (gross);
- Dimensions: 175×81×48.5mm;
- True RMS Measurement: Maximum display count 5999, supports non-sinusoidal and distorted waveforms, suitable for inverters, switching power supplies, etc.
- Wide Range Electrical Measurement: DCV/ACV up to 600V, DCA/ACA up to 10A; resistance up to 60MΩ, capacitance up to 99.99mF, frequency approx. 10Hz–10MHz.
- Temperature and Continuity Diagnosis: Equipped with K-type temperature probe, temperature measurement -40~1000℃／-40~1832℉; continuity buzzer, diode test approx. 3V, convenient for troubleshooting household appliances, lamps, sockets, and distribution panels.
- VFC/VFD Variable Frequency Filtering: Suppresses high-frequency interference, stably reads variable frequency voltage/current signals, suitable for motor drives and HVAC variable frequency control commissioning.
- NCV Non-contact Voltage Detection: Determines live state by sensing AC electromagnetic field, with sound and light prompts for quick screening of cables, switches, and terminals.
- Auto/Manual Ranging + Auxiliary Functions: MAX/MIN maximum/minimum, REL relative value, data hold, white LED backlight, auto power off in about 15 minutes.
- Safety and Durability: CAT III 600V safety rating, full-range 600V input protection; red + gray body, standard with two 1.5V batteries, suitable for daily carry by electricians. Series certifications: CE, UKCA, cETLus.
*For product-related data, please refer to the official UT139A/B/C Datasheet. Detailed operating procedures and related issues can be found in the UT139A/B/C User Manual for answers.
