UT216D 600A TRMS Digital AC/DC Clamp Meter

UNI-T UT216D 600A True RMS Digital Clamp Meter

High-Performance Measurement with Advanced OLED Display

The UNI-T UT216D is a professional-grade true RMS digital clamp meter designed for high-frequency current measurement up to 400Hz. With its 6000-count OLED display, 600A AC/DC current capacity, and comprehensive measurement functions, this versatile meter delivers exceptional precision for technicians working in IT environments, server rooms, railways, aerospace, and industrial applications. Its double injection design offers a comfortable grip and enhanced durability, while specialized functions including inrush current detection, VFC (Variable Frequency Control), and non-contact voltage detection make it the ideal tool for electrical professionals working with modern electronic equipment and variable frequency drives.

Key Features

• High-Visibility OLED Display: Superior brightness and contrast for excellent readability in all lighting conditions
• 6000-Count Resolution: Precise measurements for detailed electrical diagnostics
• True RMS Measurement: Accurate readings on non-linear loads and distorted waveforms
• High-Frequency Response: Measurement capability up to 400Hz for specialized applications
• AC/DC Current Measurement: Comprehensive 600A measurement capability
• Inrush Current Function: Captures motor and transformer startup current spikes
• VFC Function: Specialized filtering for variable frequency drive measurements
• Temperature Measurement: Wide range from -40°C to 1000°C (-40°F to 1832°F)
• Non-Contact Voltage Detection: Enhanced safety with LED indication
• Flashlight Function: Built-in illumination for dark work environments
• Analog Bar Graph: Visual representation of changing measurements
• Industry-Standard Safety Rating: CAT III 600V and CAT II 1000V protection

Advanced Measurement Capabilities for Specialized Applications

The UNI-T UT216D delivers exceptional measurement accuracy with its 6000-count display, providing the precision needed for professional electrical diagnostics. With DC voltage accuracy of ±(0.8%+3) and AC current accuracy of ±(2.5%+5), it offers professional-grade precision in a field-ready instrument. The True RMS measurement capabilities ensure accurate readings on modern electronic systems with non-sinusoidal waveforms, while the high-frequency response up to 400Hz makes it especially valuable for aerospace, railway, and IT applications where high-frequency currents are common.

The specialized VFC (Variable Frequency Control) mode filters out carrier-frequency and distorted-voltage interferences, ensuring stable readings when testing variable frequency drives and electronic motor controls. The inrush current function captures the momentary high current draw during motor or transformer startup, providing critical data for system evaluation and troubleshooting. These specialized capabilities make the UT216D particularly valuable for industrial maintenance, HVAC technicians, and field service personnel working with modern electronic equipment.

Comprehensive Measurement Capabilities

The UT216D combines essential electrical measurements with specialized functions to deliver complete diagnostic capabilities. Beyond standard voltage, current, resistance, and capacitance measurements, it offers:

• AC and DC current measurement up to 600A
• AC voltage measurement up to 750V
• DC voltage measurement up to 1000V
• Resistance measurement up to 60MΩ
• Capacitance measurement up to 60mF
• Frequency measurement from 10Hz to 1MHz
• Temperature measurement from -40°C to 1000°C (-40°F to 1832°F)
• Non-contact voltage detection (NCV)
• Continuity test with buzzer
• Diode test with approximately 3.0V test voltage
• Data hold for convenient reading capture
• MAX/MIN value recording for monitoring variations
• Relative measurement mode for comparative analysis

This comprehensive measurement suite makes the UT216D the ideal tool for professionals who need complete diagnostic capabilities in a single instrument, from electrical contractors to HVAC technicians, IT system administrators, and industrial maintenance personnel.

Practical Design for Professional Use

The UNI-T UT216D is engineered with practical features specifically designed for professional field use:

• Double injection housing for enhanced durability and comfortable grip
• Advanced OLED display with superior brightness and contrast
• Generous 30mm jaw opening for accommodating various conductor sizes
• Auto ranging for quick and convenient measurements
• Built-in flashlight for illuminating dark work areas
• Analog bar graph with 21 segments for visual trend indication
• Zero mode for easy relative measurements
• Auto power-off for extended battery life
• Low battery indicator to prevent unexpected downtime
• Compact size (220mm x 75mm x 40mm) for easy handling and storage

These practical features ensure the meter performs reliably in demanding environments including industrial installations, IT server rooms, commercial buildings, and field service applications where environmental conditions would challenge less robust instruments.

Professional Applications

IT and Data Center Environments

IT professionals rely on the UT216D's high-frequency response for:

• Server power consumption monitoring
• UPS and power system diagnostics
• Phase balance verification
• Ground fault troubleshooting
• Cooling system electrical diagnostics

Industrial Maintenance

Maintenance technicians depend on the UT216D's versatility for:

• Motor current draw measurement
• VFD system troubleshooting
• Startup inrush current analysis
• Control circuit signal verification
• Bearing temperature monitoring

HVAC/R Systems

HVAC specialists utilize the UT216D's specialized features for:

• Compressor current draw analysis
• Fan motor diagnostics
• Control system troubleshooting
• Temperature verification across components
• Capacitor testing and evaluation

Railway and Aerospace Applications

Specialized technicians leverage the UT216D's high-frequency capabilities for:

• Avionics system troubleshooting
• Railway signaling system diagnostics
• High-frequency power system analysis
• Control equipment verification
• Electronic system current profiling

Technical Specifications

Additional Features

• Display Count: 6000
• Display Type: OLED with high brightness and contrast
• True RMS Measurement: Yes
• Auto/Manual Range: Yes
• Jaw Opening: 30mm
• Non-Contact Voltage Detection: Yes
• Analog Bar Graph: 21 segments
• Data Hold: Yes
• Relative Mode: Yes
• MAX/MIN Function: Yes
• Inrush Current: Yes
• VFC Function: Yes
• Continuity Buzzer: Yes
• Auto Power Off: Yes (approximately 15 minutes)
• Low Battery Indication: ≤3.6V
• Input Protection: Yes
• Input Impedance for DCV: ≥10MΩ
• Safety Standard: CAT III 600V, CAT II 1000V
• Power Supply: 1.5V battery (R03) x 3
• Product Size: 220mm x 75mm x 40mm
• Product Weight: 231.7g

Package Contents

• UNI-T UT216D Digital Clamp Meter
• Test Leads
• Point Contact Temperature Probe
• Batteries (1.5V battery R03 x 3)
• Carrying Bag
• User Manual

Product Comparison

Frequently Asked Questions

What makes the OLED display on the UT216D advantageous over standard LCD displays?

The UT216D's OLED (Organic Light Emitting Diode) display provides exceptional brightness and contrast ratio that significantly enhances visibility across all lighting conditions. Unlike standard LCD displays, OLED technology delivers higher contrast with deeper blacks and brighter colors, making readings instantly visible even in bright sunlight or dim environments. The wider viewing angle ensures that measurements can be read clearly from various positions, while the faster response time eliminates display lag when transitioning between functions or ranges. These advantages make the OLED display particularly valuable for professionals working in challenging environments where quick, accurate readings are essential.

How does the 400Hz measurement capability benefit technicians in specialized fields?

The UT216D's extended frequency response up to 400Hz is specifically designed for industries where higher frequency AC currents are common, including aerospace, IT infrastructure, and advanced industrial controls. Standard clamp meters typically measure accurately only up to 60Hz (standard power line frequency), but modern equipment often utilizes higher frequencies. This capability allows technicians to accurately measure current in variable frequency drives, avionics systems, server power supplies, and specialized industrial equipment that operate beyond standard frequencies. The enhanced measurement range eliminates the need for specialized equipment when working on these systems, ensuring accurate readings that would be significantly distorted when measured with standard 60Hz-optimized instruments.

What is the advantage of the VFC function in industrial applications?

The VFC (Variable Frequency Control) function provides essential filtering specifically designed for measuring electrical parameters in variable frequency drive systems. When standard meters are connected to VFD outputs, they typically display unstable readings due to the high-frequency switching noise and non-sinusoidal waveforms present in these systems. The UT216D's VFC function applies sophisticated low-pass filtering that removes this high-frequency noise while preserving the fundamental operating frequency, allowing for stable and accurate voltage and current measurements. This capability is particularly valuable for maintenance technicians troubleshooting motor drives, HVAC systems, industrial automation equipment, and any application where variable frequency drives are used to control motor speed and power consumption.

How does the inrush current measurement function help in equipment diagnostics?

The inrush current measurement function captures the initial surge of current that occurs when motors, compressors, transformers, and other inductive loads start up. This momentary current spike can be 6-8 times higher than normal operating current and typically lasts for a fraction of a second, making it impossible to capture with standard measurement modes. By automatically detecting and holding this peak value, the UT216D provides critical diagnostic information for evaluating starter circuits, motor health, circuit protection sizing, and power supply capacity. The function allows technicians to identify potential causes of nuisance circuit breaker trips, determine appropriate circuit protection requirements, and diagnose startup problems in motors and compressors without requiring expensive specialized equipment.

Support and Warranty

UNI-T stands behind the UT216D with comprehensive technical support and a 1-year warranty. Our dedicated support team is available to assist with application questions, measurement techniques, and warranty service.

Professional-Grade Measurement for Specialized Applications

The UNI-T UT216D 600A True RMS Digital Clamp Meter delivers exceptional precision, advanced display technology, and specialized functions for demanding applications. With its 6000-count OLED display, high-frequency response up to 400Hz, and comprehensive measurement capabilities, it provides reliable performance for maintenance professionals working in IT environments, industrial settings, aerospace, and railway applications where standard meters would fall short.

Order Your UNI-T UT216D Today and Experience Professional-Grade Measurement for High-Frequency Applications