MI 9210A, MI type 1 ohm standard
- Replaces Thomas-Type One-Ohm
- Low Temperature Coefficient
- Improved Stability - Oil Type
- New Industry Standard
MI 9210A, MI type 1 ohm standard
The MI 9210A MI-Type standard was developed by Measurements Instruments after years of research by the NRCC and MI. This model is now offered as an improved resistance design to replace the L&N Thomas-Type One-Ohm standard, as well as other values.
These improvements have been achieved through a new annealing process of the element and changes in structural assembly.
Historical data now shows that the MI 9210A is the most stable oil-filled resistor commercially available. The 9210A model has a long term drift of less than 0.2 ppm per year and a temperature coefficient of less than 0.05 ppm / °C.
Model Specifications
| Model | Nominal | Tolerance | First Year | Stability | Max | TC at | Maximum |
| Value | ± ppm | Drift (ppm) | 12 Month | Current (A) | 25 °C ± 1 °C | Voltage | |
| Ohms | (ppm) | (ppm/°C) | |||||
| 9210A/0.1 | 0.1 | < 10 ppm | 1 | 0.2 | 1 | 0.05 | 0.1 |
| 9210A/1 | 1 | < 10 ppm | 1 | 0.2 | 0.1 | 0.05 | 0.1 |
In every country there is only one institute that uses these kinds of standards. In the other cases a set of precision resistors is used which cover the different decades.
For more information about electrical standards, please refer to the overview page. Or contact one of our consultants.
