The HP/Agilent 4328A is a precision milliohmmeter engineered for accurate measurement of low resistance values across a wide dynamic range. Built around 4-terminal Kelvin sensing methodology, it delivers repeatable results with minimal error from lead and contact resistance—essential for quality control, component validation, material characterization, and laboratory testing. The instrument combines selectable measurement speeds, high resolution, and compensation features to support both general electronics work and specialized low-resistance applications.
Technical Specifications
• Measurement Range: 0.00001 Ω to 200 MΩ
• Measurement Method: 4-terminal Kelvin sensing
• Measurement Accuracy: Typically ±0.1% of reading + 0.00001 Ω
• Resolution: 0.00001 Ω on lowest ranges
• Measurement Speed: Selectable settings (fast, medium, slow)
• DC Test Current: Selectable values to minimize device self-heating
• Display: Digital (LED or LCD)
• Power Requirements: Standard AC mains input
– Key Features
• Zero adjustment to compensate for residual lead and fixture resistance
• Open/short circuit compensation at test leads
• High-resolution digital display for direct resistance readout
• Multiple test current options to protect sensitive components
• Multiple measurement speed settings to balance acquisition time against measurement stability
– Typical Applications
• Quality control and incoming component inspection
• Contact resistance characterization
• PCB trace and solder joint validation
• Material resistivity research
• Device thermal interface testing
• General electronics laboratory measurements
– Compatibility & Integration
• Standard Kelvin clips and probes for 4-terminal connections
• Optional analog and digital output ports for data logging
• Support for GPIB (IEEE-488) and handler interfaces on equipped units
