| Electronics > Projects, Designs, and Technical Stuff |
| Accuracy of Current Source for Micro-Ohmmeter |
| (1/1) |
| namster:
Hello , for my final years projet i have to release a Micro-Ohmmeter with 4 Wires methods , i start with uncertainty Calculation , According to the calculations in 20m \$\Omega\$ Range and resolution of 1ยต \$\Omega\$ , the relative Error in Current have to be 0.01mA for 1A , Are my calculations correct ? Vref ( 10Volt ) |
| kony:
Direct measurement is quite poor choice both precision and SNR wise. This is usually done with AC excitation and synchronnous demodulator. |
| 001:
--- Quote from: kony on December 23, 2018, 11:05:03 pm ---Direct measurement is quite poor choice both precision and SNR wise. This is usually done with AC excitation and synchronnous demodulator. --- End quote --- Do You mean bridge measurments? |
| kony:
Bridge measurement is orthogonal to that, but also helps. |
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