DF: device incorporated in the meter that only allows shifting of the relative error curve generally parallel to itself, with a view to bringing errors within the maximum permissible errors and to set the weighted mean error (see T.2.20) at minimum
DF: device incorporated in the meter that only allows shifting of the relative error curve generally parallel to itself, with a view to bringing errors within the maximum permissible errors and to set the weighted mean error (see T.2.20) at minimum
DF: device incorporated in the meter that only allows shifting of the relative error curve generally parallel to itself, with a view to bringing errors within the maximum permissible errors and to set the weighted mean error (see T.2.20) at minimum