UNI-T UT171B Industrial True RMS Digital Multimeter

Professional-Grade Measurement for Industrial Applications

The UNI-T UT171B represents a new standard in professional measurement technology with its industrial-grade design and exceptional accuracy. Engineered for electrical professionals who demand superior performance in challenging environments, this advanced multimeter combines precision measurement capabilities, comprehensive data management, and rugged reliability in a feature-rich package that excels in industrial troubleshooting, maintenance, and complex electrical analysis.

Key Features

• High-Resolution 60,000 Count Display: Enhanced precision with EBTN screen technology for superior visibility
• True RMS Measurement: Accurate readings on modern non-linear loads and distorted waveforms
• 100kHz Measurement Bandwidth: Wide frequency response for comprehensive signal analysis
• AC+DC Measurement Mode: Accurately measures combined signals for complete system evaluation
• Rechargeable 7.4V Li-ion Battery: Extended operation with convenient adapter charging
• VFC Low-Pass Filtering: Eliminates high-frequency noise for accurate VFD measurements
• Peak Hold Function: Captures transient events for detailed analysis
• Data Logging: Store up to 9,999 measurements for comprehensive documentation
• USB/Bluetooth Communication: Flexible connectivity with PC and mobile platforms
• CAT III 1000V / CAT IV 600V Safety Rating: Maximum protection for industrial environments

UNI-T UT171B Details

Advanced Measurement Technology

The UNI-T UT171B delivers exceptional accuracy across a comprehensive range of measurements. Its DC voltage measurements provide laboratory-grade ±(0.025%+5) precision, while True RMS AC measurements maintain accuracy across a wide 100kHz bandwidth. This professional-level performance ensures reliable readings in complex electronic systems, variable frequency drives, and industrial control equipment.

The 60,000 count resolution displays minute variations in measurements, essential for identifying subtle changes in system performance that standard multimeters would miss. The responsive 31-segment analog bar graph provides visual indication of changing values, mimicking the functionality of traditional analog meters while maintaining digital precision.

Comprehensive Measurement Capabilities

The UNI-T UT171B excels with specialized measurement functions designed for industrial applications:

• AC+DC Measurement: Measures combined signals common in industrial systems
• Low-Impedance Voltage Measurement: Eliminates ghost voltage readings in high-capacitance systems
• Conductance Measurement: 60nS range for evaluating high-resistance components
• Temperature Measurement: -40°C to 1000°C range with K-type thermocouple
• 4-20mA Loop Percentage: Direct readout of process control signals as 0-100%
• Peak Measurement: Captures transient events with 1ms response time

These specialized functions streamline industrial diagnostics, simplifying complex measurements that would otherwise require multiple instruments or extensive calculations.

Professional Data Management

The UNI-T UT171B transforms electrical testing with advanced data management capabilities. Store up to 9,999 measurements for later analysis, facilitating comprehensive documentation of system performance over time. The integrated USB interface enables direct connection to computers for data transfer, while the optional UT-D07A Bluetooth adapter provides wireless connectivity to mobile devices.

The included PC software and compatible iDMM mobile application enable real-time data viewing, historical analysis, and professional report generation. This complete data management solution ensures measurement documentation meets professional standards for critical industrial applications.

Engineered for Industrial Reliability

The UNI-T UT171B is built for the rigors of industrial environments with a rugged double-molded housing that provides superior protection against impacts and contaminants. The high-contrast EBTN display ensures clear visibility across varied lighting conditions, while comprehensive safety features including misplug alarm, high-voltage warning, and CAT III 1000V/CAT IV 600V certification protect both the instrument and operator.

The 7.4V 2000mAh Li-ion rechargeable battery provides extended operation for demanding field applications, with convenient charging using the included power adapter. This professional power management system eliminates the ongoing cost and environmental impact of disposable batteries while ensuring reliable performance throughout extended measurement sessions.

Professional Applications

Industrial Maintenance & Troubleshooting

Maintenance professionals rely on the UNI-T UT171B for comprehensive system analysis:

• Motor and drive system performance verification
• Control circuit voltage and signal testing
• Power quality assessment and harmonic analysis
• Intermittent fault detection with data logging
• Preventive maintenance data collection and trending

Electrical Installation & Commissioning

Electrical contractors leverage advanced capabilities for system verification:

• Safety compliance testing with precise voltage measurement
• Load analysis and distribution balancing
• Ground fault detection and circuit integrity verification
• System performance documentation with data storage
• Communication between field technicians and engineering teams

Industrial Automation Systems

Automation specialists utilize specialized functions for control system maintenance:

• 4-20mA process control signal verification
• VFD output analysis with low-pass filtering
• Sensor and transducer signal testing
• PLC input/output verification
• System integration and troubleshooting

Research & Development

R&D engineers depend on high precision for product development:

• Component characterization and verification
• Power consumption profiling across operating modes
• Temperature response testing with dual measurements
• Long-term performance testing with data logging
• Electronic system performance documentation

Technical Specifications

Additional Features

• Display Count: 60,000
• Auto/Manual Range Selection
• True RMS Measurement
• Bandwidth: 100kHz
• 4-20mA Loop: 0-100%
• Low Impedance Voltage Measurement: ~3kΩ
• Diode Test: ~3V
• Continuity Buzzer
• Duty Cycle: 0.1%~99.9%
• NCV Non-Contact Voltage Detection
• Data Hold/MAX/MIN Recording
• Relative Mode Measurement
• Data Storage: 9,999 measurements
• Display Type: EBTN with 31-segment analog bar graph
• LCD Backlight
• Mis-plug Alarm
• Low Battery Indication
• Auto Power Off
• Input Protection on All Ranges
• Input Impedance for DCV: 10MΩ

Package Contents

• UNI-T UT171B Industrial True RMS Digital Multimeter
• Test Leads
• Point Contact Temperature Probe
• USB Interface Cable
• Power Adapter
• PC Software CD
• Carrying Bag
• User Manual
• 7.4V 2000mAh Li-ion Battery (pre-installed)

Optional Accessories

• UT-D07A Bluetooth Adapter for wireless connectivity

Product Comparison

Frequently Asked Questions

How does the AC+DC measurement feature benefit industrial applications?

The AC+DC measurement capability allows the UT171B to measure the true combined value of AC and DC components present in a single signal. This is critical when evaluating power supplies, variable frequency drives, and electronic circuits where both components exist simultaneously. Standard meters that measure only AC or DC components separately will not provide accurate readings in these mixed-signal environments, potentially leading to incorrect diagnostics and repairs.

What is the advantage of the UT171B's VFC low-pass filtering function?

The VFC (Variable Frequency Control) low-pass filtering function eliminates high-frequency noise when measuring outputs from variable frequency drives and motor controllers. These devices use pulse width modulation that can cause standard meters to display inaccurate readings. By filtering frequencies above power line frequency, the UT171B provides stable, accurate voltage measurements on VFD outputs that would otherwise fluctuate wildly, making it ideal for industrial motor system diagnostics.

How does the rechargeable battery system improve field operations?

The 7.4V 2000mAh Li-ion battery provides extended operation time compared to standard disposable batteries, reducing downtime during critical measurements. The included power adapter allows convenient recharging without removing the battery, while the battery status indicator ensures technicians can monitor remaining capacity. This professional power system eliminates the ongoing cost and environmental impact of disposable batteries while ensuring reliable operation throughout extended field assignments.

Can the UT171B handle data logging for extended monitoring applications?

Yes, the UT171B can store up to 9,999 measurements with timestamp information, making it ideal for extended monitoring applications. The automatic data logging function can be configured for specific intervals, allowing unattended operation to capture intermittent issues or performance patterns over time. This data can be transferred to a computer via USB or to mobile devices using the optional Bluetooth adapter, providing comprehensive documentation for trend analysis and troubleshooting.

What is the warranty period for the UNI-T UT171B?

UNI-T provides a 12-month warranty on the UT171B, covering manufacturing defects and component failures under normal use conditions.

Customer Testimonials

"As an industrial maintenance supervisor, I rely on the UT171B daily for troubleshooting complex control systems. The AC+DC measurement and VFC filtering have been game-changers when diagnosing VFD issues that our previous meters couldn't handle. The data logging capability has helped us identify intermittent problems that were previously impossible to catch." - Marcus L., Industrial Maintenance Manager

"The precision of the UT171B has been essential for our electrical commissioning work. The 60,000 count resolution and exceptional DC accuracy give us confidence when verifying critical systems, and the rechargeable battery lasts through multiple shifts without needing a charge. It's become our standard meter for all technicians." - Ananya R., Electrical Systems Engineer

"I work in automation integration, and the UT171B's ability to measure 4-20mA loops as a percentage has simplified our process control verification tremendously. The ability to store readings and transfer them via USB has streamlined our documentation process, saving hours of manual recording during system commissioning." - Jamal K., Automation Specialist

Support and Warranty

UNI-T stands behind the UT171B with comprehensive technical support and a 12-month warranty. Our dedicated support team is available to assist with application questions, measurement techniques, and warranty service.

Industrial Precision for Professional Results

The UNI-T UT171B Industrial True RMS Digital Multimeter combines exceptional measurement accuracy, comprehensive functionality, and professional-grade reliability in a package designed for industrial electrical professionals. With advanced features like AC+DC measurement, wide bandwidth, data logging, and rechargeable power, it delivers the performance needed for today's complex electrical systems.

Order Your UNI-T UT171B Today and Experience Professional-Grade Measurement Technology.