The HP/Agilent 4338B is a precision milliohmmeter designed for accurate low-resistance measurements at 1 kHz test frequency. It delivers 5½-digit LED display resolution and ±0.05% basic accuracy across eight measurement ranges spanning 0.0001 Ω to 99.99 MΩ. The instrument supports resistance, voltage, and diode measurements with continuity and temperature measurement modes. Internal and external triggering options enable flexible test automation, while GPIB (IEEE-488) connectivity provides remote control and data transfer for integrated test systems. Auto-ranging capability and open/short compensation optimize measurement precision across component testing, quality control, and research applications.
Technical Specifications
• Measurement Range: 0.0001 Ω to 99.99 MΩ
• Range Selection: 20 Ω, 200 Ω, 2 kΩ, 20 kΩ, 200 kΩ, 2 MΩ, 20 MΩ, 200 MΩ
• Basic Accuracy: ±0.05%
• Test Frequency: 1 kHz
• Display Resolution: 5½ digits (LED)
• Power Supply: 100/115/205/230 VAC ±10%, 47–63 Hz
• Power Consumption: Approximately 45 VA
• Test Signal: Selectable mV-range levels to minimize DUT self-heating
– Key Features
• Auto-ranging for optimal precision across measurement ranges
• Kelvin (4-wire) test lead compatibility for accurate low-resistance measurements
• DCR measurement capability at 1 kHz
• Open/short compensation to calibrate out test lead impedance
• Selectable internal and external trigger modes
• Temperature-compensated resistance measurements via compatible temperature probe models
• GPIB programmability for automated test sequences
– Measurement Modes
• Resistance (Ω)
• Voltage (V)
• Continuity detection
• Diode forward voltage drop
• Temperature measurement
– Compatibility & Integration
GPIB (IEEE-488) interface enables integration with automated test systems and data acquisition setups. Rear panel external trigger connector supports synchronization with external equipment. Compatible with standard 4-wire Kelvin test leads and temperature probe configurations for measurement-specific applications.
