The uncertainty of the orifice-plate discharge coefficient given by the Reader-Harris/Gallagher (1998) Equation has been calculated taking account of the uncertainty of the data on which it is based and of the variability in manufacture permitted by ISO 5167–2. This work has shown that using the correct method to determine the uncertainty in ISO 5167-2 has made an insignificant difference to the value given in the standard. However, in other similar cases where the uncertainty for an artefact is based on data from other similar artefacts the uncertainty values obtained by the correct method may be significantly different from those by the incorrect method.

由 Reader-Harris/Gallagher (1998) 方程给出的孔板流量系数的不确定性已被计算，考虑到它所基于的数据的不确定性和 ISO 5167-2 允许的制造可变性。这项工作表明，使用正确的方法来确定 ISO 5167-2 中的不确定度与标准中给出的值没有显着差异。然而，在其他类似情况下，人工制品的不确定度基于其他类似人工制品的数据，通过正确方法获得的不确定度值可能与不正确方法获得的不确定度值显着不同。