4-Wire Resistance Measurements
element14 Presents | Bald Engineer: James Lewis' VCP Profile | Workbench Wednesdays
Bench DMMs have an extra set of banana jacks called "sense." Known as a Kelvin or 4-wire measurement, these inputs accurately measure small resistances. Like, milliohms small. In this video, learn how to use a multimeter with 4-wire capability, prove 4-wire is more are accurate (in some cases), and a trick to get more accurate measurements with traditional 2-wire techniques.
Supplemental Material:
- Kelvin (4-Wire) Milliohm Meter: Version 1.3 by fmilburn
- Building Kelvin (4-Wire) Test Leads by shabaz
- Visit the Multicomp space on the element14 community!
Bill of Material:
| Product Name | Manufacturer | Quantity | Buy KitBuy Kit |
|---|---|---|---|
| MP730028 US Bench DMM, 5.5 Digits | Multicomp Pro | 1 | Buy NowBuy Now |
| Through Hole Resistor, 0.1 ohm, 3 W, ± 5%, Axial Leaded | Multicomp Pro | 1 | Buy NowBuy Now |
| Through Hole Resistor, 1 ohm, 250 mW, ± 5%, Axial Leaded, 250 V | Multicomp Pro | 1 | Buy NowBuy Now |
| Handheld DMM (72-7780) | Tenma | 1 | Buy NowBuy Now |
| Test Lead Set, Banana Plug, Test Clip, Black, Red, 914 mm | Tenma | 1 | Buy NowBuy Now |