HP / Agilent 4261A LCR METER

The HP/Agilent 4261A is a digital LCR meter for precision measurement of inductance, capacitance, resistance, dissipation factor, and quality factor across a wide range of component types. The instrument automatically selects appropriate measurement ranges and equivalent circuit modes—series or parallel—making it suitable for characterizing electrolytic and ceramic capacitors, filter coils, pulse transformers, and component internal resistance without manual intervention.

– Technical Specifications

• Measurement Parameters: L-D, C-D, R, L-D Q, C-D Q
• Test Frequencies: 120 Hz (or 100 Hz) and 1 kHz
• Capacitance Range: 10 pF to 10 mF
• Inductance Range: 10 µH to 1000 H
• Resistance Range: 10 mΩ to 10 MΩ
• Basic Accuracy: 0.2% of reading (23°C ±5°C; error doubles at 0° to 55°C)
• Display: Two 3½-digit LED displays
• Test Signal Level: 1.5 V, 2.2 V, 6 V (selectable internal); 1 V, 50 mV (Cp mode)
• Internal DC Bias: Available
• External DC Bias: 0 to +30 V
• Reading Rate: Internal trigger ~30 ms between cycles; external trigger on command; 120 (100) Hz: 670 ms per range step

– Key Features

• Dual equivalent circuit modes—series and parallel—automatically selected based on component characteristics
• Selectable test signal levels accommodate different measurement requirements
• External bias voltage capability (0 to +30 V) for elevated-bias component testing
• Two independent LED displays for simultaneous parameter readout

– Typical Applications

• Electrolytic and ceramic capacitor characterization
• Filter coil and transformer impedance measurement
• Dry cell internal resistance determination
• General-purpose LCR component testing across industrial and laboratory environments

– Compatibility & Integration

• Optional BCD simultaneous output (Option 001) and remote control (Option 003) available
• Compatible test fixtures and leads: HP 16061A (5-terminal direct couple), HP 16062A (4-terminal low impedance), HP 16063A (3-terminal high impedance)