The HP/Agilent 4271A is a precision digital LCR meter engineered for rapid, accurate measurement of inductance, capacitance, resistance, dissipation factor, and conductance at 1 MHz ±0.01%. Operating on a four-terminal pair measurement technique, it minimizes errors from stray capacitance and residual inductance—critical for evaluating low-value components and high-frequency characteristics. Dual 4½-digit LED displays with 90% overrange capability deliver clear readout, while measurement speeds up to 5 readings per second support high-throughput production testing and quality control workflows.
Technical Specifications
Measurement Parameters: Inductance (L), capacitance (C), resistance (R), dissipation factor (D), and conductance (G).
Frequency: 1 MHz ±0.01%
Measurement Ranges:
• Capacitance: 0.000 pF to 19,000 nF; resolution 0.001 pF
• Inductance: 0.000 nH to 1900.0 µH; resolution 0.1 nH
• Resistance: 10 ohms to 10 kohms full scale
• Conductance: 100.00 µS to 100.00 mS full scale
• Dissipation factor: Measured with C-D or L-D modes
Accuracy: Basic accuracy 0.1%; L, C, and R accuracy 0.2% of reading (0°C to 50°C).
Test Signal Levels: Capacitance measurement at 20 mVrms (low) or 500 mVrms (high); inductance measurement at 5 mA to 2 µA test current.
Measurement Speed: Up to 5 readings/second; C-G and L-R modes 100–250 ms; C-D and L-D modes 160–400 ms.
Display: Dual 4½-digit LED with 90% overrange.
Environmental: Operating temperature 0°C to 50°C; humidity to 95% RH at 40°C. Power: 100/120/220 VAC.
– Key Features
• Four-terminal pair technique eliminates stray and residual component effects
• Offset adjustment compensates fixture stray capacitance, inductance, resistance, and conductance
• Optional DC bias (Option 001): 00.0 V to 39.9 V in 0.1 V increments; ±0.2% of setting ±5 mV accuracy; 1.5 kΩ ±10% output resistance
• Optional calculator interface (Option 005) via TTL I/O for HP 9810A/9820A integration
– Typical Applications
Production testing, quality control, component characterization, and circuit design verification in electronics manufacturing.
