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All issues Volume 12 (2021) Int. J. Metrol. Qual. Eng., 12 (2021) 16 Full HTML
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Table 10

Uncertainty budget in efficiency, Test 1, Lab A.

Type Source of uncertainty Value (U) Unit Distribution Divisor u (xi) Veff uc (xi)
B Uncertainty of the thermometer − T1 0.10000 °C Normal 2 0.0500 ∞ 0.05401
B Lower division of the thermometer − T1 0.05000 °C Triangular 0.0204 ∞
B Uncertainty of the thermometer − T2 0.10000 °C Normal 2 0.0500 ∞ 0.05401
B Lower division of the thermometer − T2 0.05000 °C Triangular 0.0204 ∞
B Barometer uncertainty − Pa 0.06900 kPa Normal 2 0.0345 ∞ 0.03456
B Lower division of the barometer − Pa 0.00500 kPa Triangular 0.0020 ∞
B Pressure gauge uncertainty − P 0.00007 kPa Normal 2 0.0000 ∞ 0.00204
B Lower division of the pressure gauge − P 0.00500 kPa Triangular 0.0020 ∞
B Volume uncertainty of Q1 − V 0.00021 m3 Normal 2 0.0001 ∞ 0.00011
B Lower division of the volume − V 0.00005 m3 Triangular 0.0000 ∞
B Volume uncertainty of Q2 − V 0.00015 m3 Normal 2 0.0001 ∞ 0.00008
B Lower division of the volume − V 0.00005 m3 Triangular 0.0000 ∞
B Volume uncertainty of Q3 − V 0.00016 m3 Normal 2 0.0001 ∞ 0.00011
B Lower division of the volume − V 0.00005 m3 Triangular 0.0000 ∞
B Volume uncertainty of Q4 − V 0.00021 m3 Normal 2 0.0001 ∞ 0.00008
B Lower division of the volume − V 0.00005 m3 Triangular 0.0000 ∞
B Uncertainty of the gas thermometer − Tg 0.33000 °C Normal 2 0.1650 ∞ 0.19401
B Lower division of the gas thermometer − Tg 0.25000 °C Triangular 0.1021 ∞
B Balance uncertainty − M 0.00200 kg Normal 2 0.0010 ∞ 0.00306
B Smaller scale division − M 0.00500 kg Rectangular 0.0029 ∞
A Repeatability of Q1 1.08679 % Normal 0.3623 8 0.36226
A Repeatability of Q2 0.58190 % Normal 0.1940 8 0.19397
A Repeatability of Q3 0.47376 % Normal 0.1579 8 0.15792
A Repeatability of Q4 0.43333 % Normal 0.1444 8 0.14444

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