Agilent/Keysight 4338B

The Agilent/Keysight 4338B is a precision milliohmmeter engineered for low-resistance measurements across a wide range of industrial and laboratory applications. Operating at 1 kHz AC, it delivers measurement speeds as fast as 34 ms with 0.4% basic accuracy, making it suitable for high-volume testing of electromechanical components, batteries, cables, and PC boards.

– Technical Specifications

• Measurement Range: 10 µΩ to 100 kΩ
• Resolution: 10 µΩ
• Test Current Levels: Selectable AC signal from 1 µA to 10 mA (1 µA, 10 µA, 100 µA, 1 mA, 10 mA)
• Test Frequency: 1 kHz
• Maximum Applied AC Voltage: 20 mV peak
• Measurement Speed: 34 ms minimum
• Basic Accuracy: 0.4%
• Parameters Measured: R, X, |Z|, L, θ
• Power Requirements: 90–132 Vac or 198–264 Vac, 47–66 Hz, 45 VA typical

– Key Features

• Contact check function ensures reliable connections during measurement
• Built-in comparator with HIGH, IN, and LOW settings for pass/fail testing
• Auto-measurement mode optimized for very low resistances via AC test signal
• Error correction maximizes accuracy across the measurement range
• Non-volatile memory maintains operation through AC power loss
• GPIB interface for automated testing and computer control
• Isolated handler interface reduces ground loops in manufacturing environments

– Typical Applications

Electromechanical components, battery testing, cable continuity verification, and PC board resistance characterization.

– Compatibility & Integration

The 4338B accepts a range of test leads and accessories including the 16338A Test Lead Kit (Kelvin clip, pin, and alligator leads), 42091A 4-terminal pair short termination for calibration, 42030A standard resistor set (1 mΩ to 100 kΩ), and optional 4338B-1CM rackmount or 4338B-1CN front handle kits.