A non automatic weighing instrument (NAWI) is an instrument that requires the intervention of an operator during weighing.
With reference to the European Directive 2014/31/EU the use of approved weighing instruments is mandatory for legal use with third parties in the following applications and/or tasks:
the determination of mass for commercial transactions;
the determination of mass for the calculation of a toll, tariff, tax, premium, fine, remuneration, indemnity or a similar type of payment;
the determination of mass for the application of laws or regulations or for an expert judicial determination of mass in the practice of medicine in the context of weighing patients for the purposes of monitoring, diagnosis and treatment;
the determination of mass for preparing medicines on prescription in a pharmacy and the determination of mass in analyses carried out in medical and pharmaceutical laboratories;
pricing as a function of mass for direct sales to the public and the preparation of pre-packaged goods.
Instruments for legal use with third parties must be subjected to a first periodic verification prior to commissioning and will be subject to periodic verification time with frequency determined by the individual national regulations of the Member States of the European Community (In Italy every three years).
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