Table 5.
Uncertainty elements and their standard uncertainty values for the LACOMET generator, for the four nominal values of TDP/FP.
| Uncertainty for LACOMET generator : | TDP = +20 °C | TDP = +1 °C | TFP = −10 °C | TFP = −30°C |
|---|---|---|---|---|
| Saturation temperature (Thermometer and Saturator) | ||||
| Calibration uncertainty (sensor and indicator unit) °C | 0.0050 | 0.0050 | 0.0050 | 0.0050 |
| Long-term stability (sensor and indicator) °C | 0.0050 | 0.0050 | 0.0050 | 0.0050 |
| Self-heating and residual heat fluxes (sensor) °C | 0.0060 | 0.0060 | 0.0060 | 0.0060 |
| Resolution and accuracy or linearity (indicator unit) °C | 0.0005 | 0.0005 | 0.0005 | 0.0005 |
| Temperature homogeneity °C | 0.0100 | 0.0100 | 0.0100 | 0.0100 |
| Temperature stability °C | 0.0060 | 0.0060 | 0.0060 | 0.0100 |
| Saturation pressure (Pressure gauge) | ||||
| Calibration uncertainty (sensor and indicator unit) Pa | 2.4 | 2.4 | 2.4 | 2.4 |
| Long-term stability (sensor and indicator) Pa | 1 | 1 | 1 | 1 |
| Resolution and accuracy or linearity (indicator unit) Pa | 1 | 1 | 1 | 1 |
| Pressure differences in the saturator cell Pa | 20 | 20 | 20 | 20 |
| Stability of the pressure Pa | 10 | 10 | 10 | 10 |
| Gas pressure at the generator outlet (Pressure gauge) | ||||
| Calibration uncertainty (sensor and indicator unit) Pa | 10 | 10 | 10 | 10 |
| Long-term stability (sensor and indicator) Pa | 20 | 20 | 20 | 20 |
| Resolution (indicator unit) Pa | 20 | 20 | 20 | 20 |
| Stability of the pressure Pa | 10 | 10 | 10 | 10 |
| Effect of the tubing between the saturator and the pressure gauge Pa | 50 | 50 | 50 | 50 |
| Saturation efficiency °C | 0.0080 | 0.0080 | 0.0080 | 0.0080 |
| Uncertainty due to formulae/calculations | ||||
| Saturation vapor pressure formula(e) °C | 0 | 0 | 0 | 0 |
| Water vapor enhancement formula(e) °C | 0 | 0 | 0 | 0 |
| Other | ||||
| Pressure drop between point of realization and measuring instrument Pa | 25 | 25 | 25 | 25 |
| Water contaminations °C | 0.0010 | 0.0010 | 0.0010 | 0.0010 |