3.2.1.1 Purpose of Calibration
Before an analyzer is shipped from the manufacturing facility, it is operationally tested by the manufacturer to demonstrate performance to design specifications. This calibration data can then be used as a basis for any and all future operation of that analyzer. It will be necessary to calibrate or witness calibration during
inspection at the manufacturer’s facility and also during commissioning. Calibration will also be required after a maintenance shutdown or after replacement of parts in the sensing mechanism (such as light or power sources, detector elements, or columns, in the case of a chromatograph). Process as part of plant operations.

or
калибровка в присутствии представителя заказчика

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Note added at 7 hrs (2018-08-17 15:32:36 GMT)
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Инспекция, калибровка, тарировка аналогового тахографа Kienzle ...
https://tahograf.by/p8497254-inspektsiya-poverka-osvidetelst...
Весь сервис тахографов: периодическое освидетельствование, проверка, калибровка (тарировка)

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Note added at 8 hrs (2018-08-17 15:43:21 GMT)
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Sorry I overlooked the language pair


[PPT]ISO 17025 Success Factors
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اعتماد المعامل هو أعتراف منهجي موثق بكفاءة هذه المعامل في إجراء إختبارأو معايرة في نشاط معين .... يتم اختيار الاختبار و / أو أسلوب المعايرة المناسب لتلبية متطلبات العملاء. ... access to relevant areas of the laboratory for the witnessing of tests and/or calibrations performed for the customer

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Note added at 8 hrs (2018-08-17 15:47:12 GMT)
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https://www.proz.com/kudoz/arabic-to-english/international-o...

https://www.proz.com/personal-glossaries/entry/2554815-معاير...