UNI-T UT171B Industrial True RMS Digital Multimeter

The UNI-T UT171B Industrial True RMS Digital Multimeter is a professional electrical testing instrument designed for troubleshooting, maintenance, and diagnostics in industrial and electronic systems. Its True RMS measurement capability provides accurate AC measurements for many non-sinusoidal waveforms commonly encountered in variable-frequency drives, switching power supplies, and modern electrical equipment.

Featuring a 60,000-count display and a broad range of measurement functions, the UT171B measures AC/DC voltage and current, resistance, capacitance, frequency, temperature, and more. Specialized functions such as low-impedance (LoZ) voltage measurement help identify residual or ghost voltages, while VFC low-pass filtering supports voltage measurements on compatible variable-frequency drive systems.

The multimeter also includes 4–20mA current-loop measurement, non-contact voltage detection (NCV), AC+DC measurement, and data logging. USB communication and optional Bluetooth connectivity support measurement recording and analysis, making the UT171B suitable for electrical engineers, industrial technicians, maintenance teams, and electronics professionals.

Features:

• True RMS Measurement: Provides reliable AC measurements for compatible complex waveforms.

• 60,000-Count Display: Offers detailed measurement resolution for troubleshooting and diagnostics.

• AC/DC Voltage Measurement: Measures voltage up to 1000V.

• AC/DC Current Measurement: Supports current measurement up to 10A.

• Resistance and Capacitance: Measures resistance up to 60MΩ and capacitance up to 60mF.

• Frequency Measurement: Measures frequencies up to 10MHz.

• Temperature Measurement: Supports temperature measurements from -40°C to 1000°C with a compatible probe.

• LoZ Voltage Mode: Helps identify residual or ghost voltages in suitable circuits.

• VFC Low-Pass Filter: Supports voltage measurements on compatible variable-frequency drive systems.

• 4–20mA Loop Measurement: Useful for checking industrial instrumentation and process-control signals.

• NCV Detection: Provides non-contact AC voltage detection.

• Data Logging: Stores up to 9,999 measurement records.

• USB Communication: Supports connection to a computer for data transfer and analysis.

• Rechargeable Battery: Uses an internal rechargeable lithium-ion battery.

Specifications:

• Brand: UNI-T

• Model: UT171B

• Product Type: Industrial True RMS Digital Multimeter

• Display: 60,000 counts, EBTN LCD

• DC Voltage Range: 600mV–1000V

• AC Voltage Range: 600mV–1000V

• DC Current Range: 600µA–10A

• AC Current Range: 600µA–10A

• Resistance Range: 600Ω–60MΩ

• Capacitance Range: 6nF–60mF

• Frequency Range: 10Hz–10MHz

• Temperature Range: -40°C to 1000°C

• Conductance Range: 60nS

• AC Bandwidth: Up to 100kHz

• Measurement Functions: True RMS, AC+DC, LoZ, VFC, 4–20mA loop, NCV, diode test, continuity, duty cycle, relative measurement, and peak hold

• Data Storage: 9,999 readings

• Communication: USB; Bluetooth supported through a compatible optional adapter or version

• Power Supply: 7.4V rechargeable lithium-ion battery, 1800mAh

• Dimensions: Approximately 206 × 95 × 55mm

• Weight: Approximately 384g

• Safety Rating: CAT III 1000V / CAT IV 600V, as specified for the model

• Standard Accessories: Test leads, temperature probe, USB cable, power adapter, and documentation; confirm package contents with the supplier.

Applications:

• Industrial electrical maintenance and troubleshooting.

• Variable-frequency drive and motor control diagnostics.

• Testing AC/DC power supplies and electronic circuits.

• Measuring voltage and current in control panels.

• Industrial instrumentation and 4–20mA loop testing.

• Temperature checks using a compatible thermocouple probe.

• Electronic component testing and repair.

• Electrical fault detection and preventive maintenance.

• Engineering laboratories and technical training.