Micro/Milliohm Standard Resistance Box
High-precision Four-Wire Fixed Resistance Standard is designed for the calibration and verification of low-resistance measuring instruments, such as micro-ohmmeters and Kelvin bridges.
By utilizing a Kelvin (4-wire) configuration, it eliminates the impact of lead and contact resistance, ensuring high accuracy in the micro-ohm to milliohm range.
Technical Specifications
| Nominal Resistance | Test Current (Max) | Accuracy |
|---|---|---|
| 10 µΩ | 30 A | ±0.2% |
| 50 µΩ | 30 A | ±0.2% |
| 100 µΩ | 15 A | ±0.2% |
| 1 mΩ | 15 A | ±0.1% |
| 10 mΩ | 10 A | ±0.1% |
| 100 mΩ | 10 A | ±0.1% |
| 1000 mΩ (1 Ω) | 1 A | ±0.1% |
Key Features
- Industrial Grade Stability: Designed as a fixed low-resistance source spanning from 10 μΩ to 1000 mΩ.
- High Current Capacity: Engineered to withstand continuous test currents up to 30 A for the lowest ranges without significant thermal drift.
- True 4-Terminal Binding Posts: Heavy-duty terminals ensure secure connections for both high-current cables and precision sensing leads.
- Error Elimination: Effectively negates errors caused by test lead resistance and terminal contact resistance, which is critical for measurements below 1Ω.