One box. A semester of sensor labs.
Students set a temperature and see the resistance, or set a resistance and work out the temperature. They can build their own sensor tables in a spreadsheet.
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Lab: quarter bridge
- Build a bridge with three 350 Ω resistors. ohmSTAR is the fourth arm.
- Set 350.00 Ω and null the bridge.
- Step through the values below. Record the output at 5 V excitation.
- Plot output against strain. The slope gives the gauge factor.
Test points: 350 Ω strain gauge
| µε | Ω |
|---|---|
| 0 | 350.00 |
| 500 | 350.35 |
| 1000 | 350.70 |
| 2000 | 351.40 |
Values are calculated from the standard curve. They aren't an accuracy spec.