Table 2 Uncertainty analysis result
Quantity source of uncertainty | Value of quantity | Uncertainty type | Confidence level | Converge factor | Standard uncertainty | Sensitivity coefficient | Uncertainty component | Combined uncertainty | Expanded uncertainty |
|---|---|---|---|---|---|---|---|---|---|
(k ) | (u i ) | (c i ) | (u i c i ) | (u c ) | (U ) | ||||
Temperature measurement | |||||||||
Thermocouple type K, °C | −270 to 1,372 | Type B | 95% | 2 | 0.57735 | 1 | 0.57735 | 0.33362 | 0.66724 |
Data logger, °C | −200 to 1,100 | Type B | 95% | 2 | 0.57735 | 1 | 0.57735 | ||
Uncertainty of mean reading, °C | - | Type A | 95% | 2 | 0.024 | 1 | 0.024 | ||
Flow measurement | |||||||||
Air flow meter, m/s (Operation range, −30°C to 140°C) | 0 to 20 | Type B | 95% | 2 | 0.12 | 1 | 0.12 | - | - |