This is from ISO-17025 and should clear this up.
5.5.8 Whenever practicable, all equipment under the control of the laboratory and requiring calibration shall be
labeled, coded or otherwise identified to indicate the status of calibration, including the date when last calibrated
and the date or expiration criteria when recalibration is due.
5.5.9 When, for whatever reason, equipment goes outside the direct control of the laboratory, the laboratory shall
ensure that the function and calibration status of the equipment are checked and shown to be satisfactory before
the equipment is returned to service.
5.5.10 When intermediate checks are needed to maintain confidence in the calibration status of the equipment,
these checks shall be carried out according to a defined procedure.
5.5.11 Where calibrations give rise to a set of correction factors, the laboratory shall have procedures to ensure
that copies (e.g. in computer software) are correctly updated.
5.5.12 Test and calibration equipment, including both hardware and software, shall be safeguarded from
adjustments which would invalidate the test and/or calibration results.
5.5.8 Whenever practicable, all equipment under the control of the laboratory and requiring calibration shall be
labeled, coded or otherwise identified to indicate the status of calibration, including the date when last calibrated
and the date or expiration criteria when recalibration is due.
5.5.9 When, for whatever reason, equipment goes outside the direct control of the laboratory, the laboratory shall
ensure that the function and calibration status of the equipment are checked and shown to be satisfactory before
the equipment is returned to service.
5.5.10 When intermediate checks are needed to maintain confidence in the calibration status of the equipment,
these checks shall be carried out according to a defined procedure.
5.5.11 Where calibrations give rise to a set of correction factors, the laboratory shall have procedures to ensure
that copies (e.g. in computer software) are correctly updated.
5.5.12 Test and calibration equipment, including both hardware and software, shall be safeguarded from
adjustments which would invalidate the test and/or calibration results.
