conservation

of an examination standard
https://doi.org/10.1351/goldbook.10033

Set of operations necessary to preserve the examinational properties of an examination standard within stated limits.

Note: Conservation of an examination standard commonly includes periodic verification of predefined nominal properties or examination calibration, storage under suitable conditions, and specified care in use.
Source:
PAC, 2018, 90, 913. 'Vocabulary on nominal property, examination, and related concepts for clinical laboratory sciences (IFCC-IUPAC Recommendations 2017)' on page 932 (https://doi.org/10.1515/pac-2011-0613)