Section 10n in The Standards of Weights and Measures (General) Rules, 1987
10n.
, 2x10nor 5x 10nwhere "n" represents either zero or a whole number, positive or negative.(g)The total number of graduations shall not be less than 100 but not more than 1000.(h)The dial and pointer may be enclosed by a suitable lens to increase legibility of the reading.(i)The graduation lines shall be of reasonably uniform thickness throughout their length.(j)Every fifth graduation line shall be longer and at least every tenth graduation line shall be numbered.(k)The pointer may preferably be in a contrasting colour to the graduation lines and the dial. The pointer may meet the graduation lines and may cover but not completely obscure them.(l)When the graduation commences at a fixed load, the position of the pointer, when there is no load, shall be clearly indicated by a zero mark.(m)The scale shall be provided with a zero setting device except where auto zeroing has been provided.(n)The scale shall be provided with a device to prevent the effect of any overloading which may adversely affect its metrological qualities.
