UNI-T UT622A Handheld LCR Meter | Professional Precision Component Tester

Overview

The UNI-T UT622A handheld LCR meter delivers laboratory-grade measurement precision in a portable, field-ready package for electronics professionals. Featuring an exceptional measurement accuracy of up to 0.1%, this professional-grade instrument provides reliable inductance, capacitance, and resistance measurements across multiple test frequencies. The intuitive 2.8-inch TFT LCD display with high-brightness white backlight ensures clear visibility in any working environment, while the large-capacity rechargeable lithium polymer battery supports up to 8 hours of continuous operation for extended testing sessions. Whether you're working in quality control, component verification, or field maintenance, the UT622A combines accuracy, convenience, and reliability in a compact, ergonomic design perfect for both bench and field applications.

Key Features

• High Precision Measurement - Up to 0.1% measurement accuracy for reliable component testing
• Multiple Test Frequencies - Selectable 100Hz, 120Hz, 1kHz, and 10kHz test frequencies
• Versatile Measurement Parameters - Primary (L/C/R/Z) and secondary (D/Q/θ/ESR) parameters
• Adjustable Test Signal Level - Three test levels (0.1Vrms, 0.3Vrms, 1Vrms) for various component types
• Constant 100Ω Output Impedance - Ensures measurement stability and accuracy
• Auto LCR Function - Automatically identifies component type for simplified testing
• Equivalent Mode Selection - Series or parallel circuit models for comprehensive component analysis
• Tolerance Sorting - Adjustable 1%-20% tolerance range with LED pass/fail indication
• Open/Short Circuit Correction - Clearing correction for improved measurement accuracy
• High-Visibility Display - 2.8-inch TFT LCD with 320×240 resolution and white backlight
• Extended Battery Life - Up to 8 hours of operation from rechargeable 3.7V 1800mAh lithium polymer battery
• USB Connectivity - Standard Mini-USB interface with SCPI command set for computer integration

UNI-T UT622A Details

Professional-Grade Measurement Precision

The UNI-T UT622A delivers exceptional measurement accuracy of up to 0.1%, providing engineers and technicians with laboratory-grade precision in a portable instrument. The meter supports wide measurement ranges including inductance from 0.01μH to 99.999H, capacitance from 0.00pF to 99.999mF, and resistance/impedance from 0.0000Ω to 9.9999MΩ. This impressive range and accuracy make the UT622A suitable for testing components in various applications, from consumer electronics to industrial equipment maintenance. The constant 100Ω output impedance ensures measurement stability and consistency across different test frequencies and component types.

Versatile Multi-Parameter Testing

The UT622A offers comprehensive component characterization with both primary and secondary parameter measurements. Primary parameters include inductance (L), capacitance (C), resistance (R), and impedance (Z), while secondary parameters include dissipation factor (D), quality factor (Q), phase angle (θ), and equivalent series resistance (ESR). This multi-parameter capability allows for thorough component analysis, identifying not only basic values but also quality indicators and equivalent circuit characteristics. The auto LCR function automatically identifies component type, streamlining the testing process and improving workflow efficiency in sorting and verification applications.

Adaptable Test Configuration

With four selectable test frequencies (100Hz, 120Hz, 1kHz, and 10kHz), the UT622A adapts to various component testing requirements. The 120Hz and 1kHz frequencies are ideal for standard capacitor testing, while 10kHz improves accuracy for small inductance measurements. The three test signal levels (0.1Vrms, 0.3Vrms, and 1Vrms) allow testing of voltage-sensitive components like ceramic capacitors or testing components under conditions closer to actual operating parameters. The selectable series/parallel equivalent mode ensures accurate modeling of component behavior in different circuit configurations, providing more relevant measurements for specific applications.

Production-Oriented Functionality

The UT622A includes features designed for production and quality control environments. The adjustable tolerance range (1%-20%) with LED pass/fail indication enables rapid component sorting without constant reference to the display. The red/green LED indicators provide clear visual feedback, accelerating inspection processes and reducing operator fatigue. With three test speeds available, users can balance measurement speed and accuracy according to application requirements. The data hold and recording functions facilitate documentation of measurement results, while the open/short circuit correction capability ensures measurement accuracy by compensating for test fixture parasitic effects.

Professional Applications

Electronics Manufacturing and Quality Control

In electronics manufacturing environments, the UNI-T UT622A serves as an essential tool for component verification and quality assurance. Production engineers can quickly verify incoming components against specifications, ensuring they meet design requirements before assembly. The tolerance sorting function with LED indication streamlines the screening process, allowing technicians to rapidly identify out-of-spec components. The meter's portability enables spot-checking at multiple points along the production line, while its accuracy ensures reliable quality verification. For small to medium production operations, the UT622A offers an economical alternative to automated test equipment for component validation.

Field Service and Maintenance

Maintenance technicians benefit from the UT622A's portable design and extended battery life when diagnosing equipment issues in the field. The meter's comprehensive measurement capabilities allow technicians to verify suspicious components without removal from circuit boards when possible, or accurately test removed components to confirm failures. The bright display with white backlight ensures visibility in poorly lit maintenance environments, while the rugged design withstands the demands of field service work. With its auto LCR function and intuitive interface, the UT622A enables quick component testing even in challenging field conditions, reducing equipment downtime and improving service efficiency.

Educational and Laboratory Applications

In educational settings and electronics laboratories, the UNI-T UT622A provides students and researchers with a versatile instrument for component characterization and circuit analysis. The ability to measure both primary and secondary parameters helps students understand component behavior beyond basic values, exploring concepts like dissipation factor and phase relationships. The multiple test frequencies enable investigation of frequency-dependent component characteristics, supporting both basic education and advanced research. The meter's USB connectivity and SCPI command set further enhance its utility in automated laboratory testing setups, allowing integration with measurement systems and data collection for analysis.

Technical Specifications

Optional Accessories

Package Contents

• UNI-T UT622A Handheld LCR Meter
• Short circuit board (UTR-001)
• Alligator clip test leads with rubber plugs (UTR-002)
• USB cable
• 5V/1A power adapter
• English manual
• Gift box packaging

UNI-T UT622 Series Comparison Table

Frequently Asked Questions

What is the advantage of having multiple test frequencies in the UNI-T UT622A?

Different components show varying characteristics at different frequencies, making multiple test frequencies essential for comprehensive component analysis. The 100Hz and 120Hz frequencies are industry standards for electrolytic capacitor testing, with 120Hz being the common ripple frequency in power supplies. The 1kHz frequency is ideal for general-purpose testing of most passive components and matches common audio frequency testing requirements. The 10kHz frequency improves measurement accuracy for low-value inductors and high-frequency components. This versatility allows the UT622A to characterize components across various operating conditions, providing insights into frequency-dependent behavior critical for circuit design and troubleshooting.

How does the Auto LCR function improve testing efficiency?

The Auto LCR function automatically identifies whether the connected component is an inductor (L), capacitor (C), or resistor (R) without manual selection, significantly streamlining the testing process. When a component is connected, the meter analyzes the impedance characteristics and selects the appropriate measurement mode, displaying the most relevant parameters. This automation reduces operator error and accelerates testing when working with mixed component types, such as during board repair or component sorting. For production environments, this feature minimizes training requirements and improves throughput by eliminating the need to manually configure the instrument for each component type.

What is the significance of the series and parallel equivalent modes?

Components like capacitors and inductors can be represented by different equivalent circuit models depending on their application context. The series equivalent mode represents the component as an ideal element in series with parasitic resistance, while the parallel mode represents it as an ideal element in parallel with a resistive element. The UT622A allows selection of either mode to match the component's actual application circuit configuration. For example, electrolytic capacitors are typically measured in series mode to account for ESR, while ceramic capacitors are often measured in parallel mode. This flexibility ensures measurements reflect the component's behavior in its intended circuit configuration, providing more relevant data for design and troubleshooting.

How does the tolerance sorting function benefit production testing?

The tolerance sorting function transforms the UT622A into an efficient quality control tool by comparing measured values against preset tolerance limits ranging from 1% to 20%. When a component is tested, the meter instantly evaluates whether it falls within the specified tolerance range and provides clear pass/fail indication through the colored LED system – green for pass and red for fail. This visual feedback allows operators to rapidly sort components without constantly referring to the numerical display, significantly increasing sorting speed and reducing eye fatigue. For small to medium production environments, this feature offers an economical alternative to expensive automated sorting systems while maintaining reliable quality control.

Can the UNI-T UT622A store measurement results or transfer them to a computer?

While the UT622A does not have internal storage for measurement results, it offers data transfer capabilities through its Mini-USB interface using the standard SCPI (Standard Commands for Programmable Instruments) command set. This allows connection to a computer for real-time data acquisition, enabling users to log measurements, create test reports, or integrate the meter into automated test systems. The SCPI command support means the UT622A can work with various test software platforms without requiring proprietary drivers. For applications requiring data logging, users can connect the meter to a computer running appropriate software to capture, analyze, and archive measurement results, making it suitable for documentation-intensive environments like quality assurance and research laboratories.

How does the Open/Short circuit correction improve measurement accuracy?

The Open/Short circuit correction feature compensates for parasitic impedances introduced by test fixtures, leads, and the meter's internal circuitry, significantly improving measurement accuracy, especially for low-value components. Before measuring, users can perform a two-step calibration: first measuring with the test terminals open (no connection) to compensate for parallel parasitic impedances, then with the terminals shorted using the included calibration plate to compensate for series impedances. This calibration process effectively "zeros out" these parasitic effects, establishing a more accurate reference point for subsequent measurements. This feature is particularly valuable when measuring small inductances (below 1μH), low capacitances (below 100pF), or low resistances where test lead impedances could otherwise introduce significant measurement errors.

Customer Testimonials

"As a field service technician specializing in industrial electronics repair, I depend on my UT622A daily for component verification. The battery life easily lasts through my entire shift, and the auto LCR function saves valuable time when troubleshooting circuit boards with mixed components. The rugged construction has held up well to frequent travel between sites." - Miguel R., Electronics Maintenance Specialist

"In our small electronics manufacturing operation, we use the UT622A for incoming component inspection. The tolerance sorting with LED indication has streamlined our quality control process significantly. The accuracy is impressive for an instrument in this price range, and we've found it compares favorably with bench instruments costing much more." - Sarah T., Production Manager

"As an electronics instructor, I've equipped our student lab with UT622A meters for component characterization exercises. The intuitive interface reduces the learning curve for students, while the multiple test frequencies allow exploration of real-world component behavior. The USB connectivity has proven valuable for lab exercises requiring data collection and analysis." - Ahmed K., Electronics Engineering Professor

Warranty and Support

The UNI-T UT622A handheld LCR meter is backed by a comprehensive 1-year warranty covering manufacturing defects and component failures under normal use conditions. UNI-T provides dedicated technical support through our experienced engineering team, with responsive service available via phone, email, and our online knowledge base. Calibration services and extended warranty options are available to ensure your instrument maintains peak performance throughout its service life.

The Portable Precision Solution for Component Testing

The UNI-T UT622A handheld LCR meter delivers the perfect balance of measurement precision, functional versatility, and operational convenience for electronics professionals. Whether you're verifying component specifications, troubleshooting circuit issues, or conducting quality control inspections, the UT622A provides reliable measurements in a compact, field-ready package. Experience the difference that professional-grade component testing can make in your electronics work.