However, when the initial verification takes place in the manufactur
er's workshops, the tests may be carried out with the cover removed as long as it has been previously accepted as having practically no effect on the performance of the meter.
Nevertheless, when dielectric properties are checked, the meter cover shall be fitted. After the dielectric strength test has been satisfactorily carried out, but before any other test, the meters shall be supplied with electricity for at least half an hour at the reference voltage and with a cu
...[+++]rrent of about 0.1 Ib, at unity power factor.
