The HP/Agilent 4277A is a precision LCZ meter for measuring inductance, capacitance, and impedance of electronic components at 1 kHz. It delivers 0.1% to 0.5% accuracy across wide measurement ranges and supports series and parallel equivalent circuit representations. Dual digital displays enable simultaneous readout of two parameters—such as L and Q, C and D, or Z and θ—making it ideal for component characterization in manufacturing, R&D, and field service applications.
Technical Specifications
The 4277A measures inductance from 0.1 µH to 10 kH, capacitance from 0.1 pF to 1000 µF, and impedance from 10 mΩ to 10 MΩ. Test frequency is fixed at 1 kHz. Measurement accuracy is typically 0.1% to 0.5% of reading depending on range and parameter. Selectable test signal levels are 0.5 Vrms or 1 Vrms. The instrument offers Fast, Medium, and Slow measurement modes to match application requirements.
Correction methods include Open, Short, and Load compensation for fixture-referenced measurements. Triggering options are Internal, External, and Manual. Power consumption is approximately 50 VA across universal AC line inputs of 100 V, 120 V, 220 V, or 240 V ±10% at 48 Hz to 66 Hz.
– Key Features
• Dual digital displays for simultaneous two-parameter readout
• Series and parallel equivalent circuit measurement modes
• Open, Short, and Load compensation for accuracy at the test fixture
• Three measurement speed settings (Fast, Medium, Slow)
• Selectable test signal levels (0.5 Vrms or 1 Vrms)
• Internal, external, and manual trigger options
• Analog outputs for measurement recording
– Typical Applications
The 4277A serves electronics manufacturing quality control, design validation, component characterization in R&D laboratories, and field service diagnostics. It is well-suited for passive component evaluation across a broad range of inductances and capacitances.
– Compatibility & Integration
Connections are via standard 4-terminal kelvin or BNC connectors. Optional IEEE-488 (GPIB) interface supports remote control and data logging. The instrument accommodates various test fixtures and jigs for different component sizes and lead configurations. Weight is approximately 8 kg to 12 kg.
