Balance calibration

balance calibration in which guidelines ?

Pharma industry standards need to undergo 3 principles to achieve high quality
Validation
Qualification
Calibration

FDA/EMEA\GMP\ISO state that manufacturers must maintain calibration records.
In there documentation is mentioned that is utmost important and it is required.

I do not know which part of all the documentations, since there are many.
But simply said all equipment which measure (balance, sensors etc) need to be calibrated.

https://www.mt.com/se/sv/home/library/white-papers/laboratory-weighing/Metrology/calibration-of-weighing-instruments-measurement-uncertainty.html

https://www.mt.com/us/en/home/perm-lp/market-organizations/usa/new-accuracy-calibration-certificates.html