| Ratio (expected value/measured value) | ||||||
| External calibration method | Calibration point n˚1 | Calibration point n˚2 | Calibration point n˚3 | Calibration point n˚4 | Calibration point n˚5 | Calibration point n˚6 |
| Experiment 1 | 1.03 | 1.00 | 1.02 | 1.00 | 1.00 | 1.00 |
| Experiment 2 | 1.04 | 1.03 | 1.02 | 1.03 | 1.02 | 1.03 |
| Experiment 3 | 1.06 | 1.02 | 1.00 | 1.02 | 0.99 | 1.02 |
| Experiment 4 | 0.97 | 0.98 | 0.98 | 0.97 | 0.98 | 1.00 |
| Experiment 5 | 0.95 | 0.92 | 1.04 | 0.95 | 0.96 | 0.96 |
| Experiment 6 | 1.00 | 1.01 | 0.99 | 0.99 | 1.00 | 1.01 |