PLEASE NOTE:
Where statements of conformity (e.g. classification) are required, the inherent decision‑rule defined in the relevant standard will be applied (e.g. BS 7882:2017 for torque‑measuring device classification). If the applicable standard does not define a decision‑rule, a documented laboratory decision‑rule shall be applied in accordance with ISO/IEC 17025 requirements.
For calibrations performed to ISO 6789-1:2017 (hand torque tools), no inherent decision‑rule is specified. In this case, conformity is determined using the laboratory’s defined rule: the expected measurement error shall not exceed the maximum permissible relative deviation specified in ISO 6789‑1:2017 clause 5.1.5, and the associated relative expanded uncertainty interval shall be taken as 150% of this permissible deviation.
For other agreed decision rules, please use DR2 framework:
DR 2
Customer Specified:
Torque Analysers - maximum acceptable level of uncertainty to be defined and additional costs to be agreed before commencing work.
Hand Tools - maximum acceptable Expected Measurement Error and the maximum acceptable Expected Relative Uncertainty Interval to be defined and additional costs to be agreed before commencing work
Please contact our Service team regarding any questions regarding decision rules.