I checked the values of the buoyancy effect in PR suspensions.
Observations
- The buoyancy effect in PR2 seems very large. The LVDT calibration factors should be checked.
- In PRM the buoyancy effect in the SF also looks very large.
- In PR3 the temperature did not remain constant during the venting, but increased by 0.3 °C. This means that the reported displacement values underestimate the real buoyancy effect.
- In PRM it seems the thermometer wasn't working when the venting began, so we don't know what the initial temperature was.
PR2 suspension
| PR2 GAS Filter | Initial (µm) | Final (µm) | Buoyancy effect (µm) |
| SF | -1029 | 4297 | 5326 |
| BF | -37 | 1696 | 1733 |
| Temperature | 23.8 °C | 23.8 °C |
PR3 suspension
| PR3 GAS Filter | Initial (µm) | Final (µm) | Buoyancy effect (µm) |
| SF | -635 | -50 | 585 |
| BF | 3620 | 4069 | 449 |
| Temperature | 23.5 °C | 23.8 °C |
PRM suspension
| PRM GAS Filter | Initial (µm) | Final (µm) | Buoyancy effect (µm) |
| SF | 4219 | 6153 | 1934 |
| BF | 1192 | 1500 | 308 |
| Temperature | unknown | 23.9 °C |
