Agilent 4284A 精密LCR表：元器件阻抗测量的经典基准

Agilent 4284A Precision LCR Meter: The Benchmark for Accuracy, Functionality, and Reliability

In the fields of passive component R&D, material characterization, and quality inspection, precise measurement of inductance, capacitance, and resistance is fundamental to ensuring circuit performance and consistency. The Agilent (now Keysight) 4284A Precision LCR Meter, recognized as an industry-standard instrument for impedance measurement, is renowned for its exceptional measurement accuracy, wide test frequency range, and outstanding stability. It is widely used in high-end R&D, quality certification, and precision production test environments.

To ensure such high-precision measurement instruments consistently provide accurate and reliable test data, periodic metrological calibration and professional maintenance are crucial. Shenzhen Bao'an Shajing Fangfengrui Instrument Equipment Business Department possesses extensive experience in the field of precision impedance measurement and instrument services, offering professional technical support and service guarantees for 4284A users.

Core Performance and Technical Features:

• Wide Frequency Range and Ultra-High Precision

  • Covers a frequency range from 20 Hz to 1 MHz, providing a broad test platform for studying material dielectric properties and analyzing component high-frequency performance.

  • Achieves a basic measurement accuracy of 0.05%, ensuring excellent measurement repeatability across a wide impedance range (0.1 mΩ to 130 MΩ).

• Comprehensive Measurement Parameters and DC Bias Capability

  • Precisely measures a full set of impedance parameters including |Z|, |Y|, θ, R, X, G, B, L, C, D, Q, enabling comprehensive component characterization.

  • Features built-in ±100 V DC bias voltage source (Option 001) and ±100 mA DC bias current source (Option 002), facilitating the testing of capacitor bias voltage characteristics or inductor performance with superimposed DC.

• Advanced Test Fixture Compensation and Sweep Functions

  • Supports various compensation methods (open, short, load) to effectively eliminate the influence of test fixture parasitic parameters, ensuring true measurements at the Device Under Test (DUT) interface.

  • Provides list sweep mode, allowing users to define up to 201 test points (varying frequency, level, or bias) for automated characteristic analysis.

• Powerful System Integration and Connectivity

  • Standard GPIB and RS-232 interfaces with SCPI command set support enable easy integration into Automated Test Equipment (ATE) systems.

  • High test speed meets production efficiency requirements without compromising accuracy.

Typical Application Scenarios:

• High-Precision Passive Component Testing: Measuring the actual impedance, loss tangent, and Q factor of MLCCs, power inductors, precision resistors, etc., at high frequencies.

• Material Dielectric Characterization: Researching the variation of dielectric constant and loss factor with frequency/bias for films, ceramics, polymers, and other materials.

• Piezoelectric Component and Electrolytic Capacitor Testing: Utilizing its robust DC bias capability to test the C-V characteristics of piezoelectric ceramic discs or the leakage current of electrolytic capacitors.

• Scientific Research and Metrology Calibration: Used in universities, research institutes, and metrology departments for cutting-edge material research or as a secondary standard for value transfer.

Professional Calibration Ensures Measurement Traceability

The measurement accuracy of LCR meters, particularly at low and high impedance extremes, can drift over time due to temperature variations and usage. The output accuracy of its built-in DC bias sources also requires regular calibration.

Shenzhen Bao'an Shajing Fangfengrui Instrument Equipment Business Department provides critical support in this area:

• Comprehensive Metrology and Calibration: Performs precise calibration and traceability for the 4284A's basic L, C, R accuracy across all ranges and test frequencies, as well as for secondary parameters like D and Q, according to national standards.

• DC Bias Function Verification: Verifies the output accuracy of DC bias voltage/current and its impact on impedance measurements.

• Test Fixture Compensation Services: Assists users with test fixture compensation procedures to ensure measurement accuracy.

• Fault Diagnosis and Performance Optimization: Provides professional diagnosis and repair for issues like poor measurement repeatability, self-test failures, and communication abnormalities, restoring the instrument to optimal performance.

Conclusion

The Agilent 4284A Precision LCR Meter has set a classic standard for high-precision impedance measurement of passive components and materials with its top-tier industry accuracy, comprehensive test functions, and enduring reliability. Even with subsequent models available, it continues to play an irreplaceable role in many demanding laboratories and production lines.

Ensuring this classic instrument continues to deliver trustworthy data requires professional maintenance as a backbone. By partnering with a professional service provider like Shenzhen Bao'an Shajing Fangfengrui Instrument Equipment Business Department, users can ensure their 4284A consistently operates in the best metrological condition, thereby providing an unquestionable data foundation for component development, material research, and quality control.