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Table 4

Uncertainty budget in the contribution of the working standard.

Uncertainty component Value
f1 offset correction: u(ϵ1) 0.22Pa
RSG slope stability 6.6 × 10−6 × p
Linearity and hysteresis 0.21Pa
Ambient temperature (±3 K) 2.0 × 10−6 × p
Combined uncertainty (k = 1) 4.9 × 10−6 × p + 0.28Pa
Non applied correction: offset modelling between f2 and f3 0.13Pa
Working standard contribution uncertainty ucont(p) (k = 1) ucont = 4.9 × 10−6 × p + 0.35Pa0.35 + 4.4×10‑6×p

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