Select reference standards

Select reference standards before recording measurements that depend on them.
Select standards
- Open the calibration hub.
- Open Reference standards.
- Select the standards actually used.
- Associate each usage with the measurement sets it supports.
- Review capability, valid range, calibration state, restrictions, and eligibility on the performed date.
- Save the usage evidence.
Metra evaluates organisation ownership, calibration validity, capability coverage, traceability, and restrictions. Blocking findings must be resolved. Authorised warnings remain visible with their acknowledgements.
If you arrived from procedure execution, use the return action to continue the same procedure step. Changing usage after dependent evidence was created can make later evidence stale and require recalculation.
Searching for another reference standard preserves your current selections, supported measurement sets and unsaved reasons. Select Save reference standards to retain all changes together. A failed search leaves your working copy available.