The HP/Agilent 4274A is a microprocessor-based LCR meter engineered for precision impedance characterization of electronic components, materials, and circuits across diverse operating conditions. This instrument delivers 0.1% basic accuracy and up to 5½-digit resolution, making it essential for R&D, quality control, and production testing environments requiring detailed component analysis.
– Technical Specifications
Measurement Parameters
• Inductance (L), Capacitance (C), Resistance (R), Dissipation Factor (D), Quality Factor (Q)
• Equivalent Series Resistance (ESR), Conductance (G), Susceptance (B), Reactance (X)
• Absolute impedance magnitude (|Z|) and Phase Angle (θ)
• Absolute and percentage deviation measurement
Test Frequencies & Accuracy
• 100 Hz to 100 kHz range with 11 spot frequencies: 100 Hz, 120 Hz, 200 Hz, 400 Hz, 1 kHz, 2 kHz, 4 kHz, 10 kHz, 20 kHz, 40 kHz, 100 kHz
• Spot frequency accuracy: ±0.01%
• Optional support for one or two arbitrary test frequencies
Signal Level Control
• 1 mVrms to 5 Vrms, continuously variable across four ranges
• Front panel adjustable with integrated test signal level monitor
Resolution & Range
• High resolution: 5½ digits; Normal mode: 4½ digits
• D resolution to 0.00001
• Capacitance: 1 pF to 1000 mF
• Inductance: 100 nH to 10 kH
• Resistance: 100 mΩ to 10 MΩ
Measurement Modes
• Series and parallel equivalent circuit selection
• Automatic mode for circuit topology selection
• Automatic zero offset compensation; normalization range: C<20 pF, L<2000 nH, R<0.5 Ω, G1 kHz), 140–210 ms (≤1 kHz)
• Z-θ mode: 170–210 ms (>1 kHz), 170–240 ms (≤1 kHz)
• High resolution mode adds approximately 8× normal time
• Auto-ranging: 100–300 ms per range change
– Key Features
• Four-terminal pair configuration with auto-zero adjustment minimizes test lead and fixture errors
• Internal or external triggering; manual trigger option
• Auto or manual ranging (Up/Down)
• Automatic self-test with pass/fail indication
• Optional DC bias: ±35 V (1 mV resolution) or ±99.9 V (100 mV resolution)
– Electrical Requirements
• Power: 100/120/220/240 VAC, ±10% (240 V: +5% / −10%), 48–66 Hz
• Maximum consumption: 135 VA
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