An exceptional case is where the indicator of the torque measuring device is nonadjustable,
or has the capability only of fitting a straight line to the data. The values
determined for fq or fa are treated as systematic errors whose moduli represent a nondominant
part of the uncertainty. In these cases the expanded uncertainty statement at
the desired coverage probability of 95% (cf. Ref. No. 3) can only be obtained by equations
(16) and (16a), a procedure described in F.2.4.5 of the Guide to the Expression of
Uncertainty in Measurement (cf. Ref. No. 4)