If scales are NSF certified, is that ok for calibration certification?

I have scales that are purchased from a restaurant warehouse type store. they are NSF certified. They are the only scales I have and I use them to measure ingredients and to verify final product weight.

is that ok for calibration certification or do I need NTEP certified scales? I purchase new each year.

I am only going for a basic GMP, not a GFSI cert at this time.

NSF places their seal on products, in effect a certificaiton for the product (in this case scales.)

The NSF mark however is not a calibration certification.

Obtain NIST certified weights - use them monthly to verify the scales are operating within acceptable parameters - handle the test weights with cotton gloves as the salt and sweat will affect the weight accuracy.

Companies that are calibration specialists can come in or you can send your scales to them to have them calibrated (they provide the certificate) - we do ours annually - the test weights monthly

Any products that certified under NSF, its to indicate that that item passed numerous NSF testing for material safety, design, construction, and product performance. And still need to do calibration to ensure the accuracy of scales through the usage period within acceptable limit and working properly