eelnevalt taatlemata mõõtevahendi taatlus, verification of a measuring instrument which has not been verified previously, series of tests and visual examinations carried out before the equipment/weight is put into service to determine whether a weight or weight set has been manufactured to replicate a given type and conforms to that type and to regulations, and that its metrological characteristics lie within the limits required for initial verification of copies of that type, enne vihi/vihtide komplekti kasutuselevõttu tehtud katsete ja visuaalsete uuringute seeria, et teha kindlaks, kas viht või vihtide komplekt on toodetud vastavuses sellele tüübile ja eeskirjadele, ning et selle metroloogilised omadused jäävad piiridesse, mis on vajalikud seda tüüpi vihtide esmataatluseks