工程指南
工程指南
选型、术语与测量工作流将以条件、来源和适用边界为中心组织，避免把不完整的演示记录包装成通用工程建议。
Choosing a DMM
How to choose a digital multimeter: accuracy, resolution, input impedance, and the safety category that actually matter for your measurements.
Choosing an SMU
Source-measure units explained: four-quadrant operation, current resolution, and when an SMU beats a power supply plus two multimeters.
Four-wire (Kelvin) resistance measurement
Why lead resistance ruins low-ohm measurements and how four-wire Kelvin sensing removes it — with wiring and when it actually matters.