http://www.legislation.gov.uk/id/uksi/1963/1710

SCHEDULE 2

PART IXWEIGHBRIDGES

Vibrating weighing instruments without dials				Accelerating weighing instruments without dials			Instruments with dials
Capacity of machine	Weight to be added to test sensitiveness when fully loaded		Error in excess or in deficiency when fully loaded		Error in excess or in deficiency when fully loaded		Weight required to bring back the steelyard indicator from position of greatest displacement when fully loaded must not exceed—	Error in excess or in deficiency when fully loaded
Upon passing as fit for use for trade	In relation to the obliteration of stamps	Upon passing as fit for use for trade	In relation to the obliteration of stamps	Upon passing as fit for use for trade	In relation to the obliteration of stamps	Upon passing as fit for use for trade	Upon passing as fit for use for trade	In relation to the obliteration of stamps
1 ton	1½ pounds	4½ pounds	1½ pounds	3 pounds	1½ pounds	3 pounds	4 pounds	3 pounds	6 pounds
2 tons	2 pounds	6 pounds	2 pounds	4 pounds	2 pounds	4 pounds	5 pounds	4 pounds	8 pounds
5 tons	3½ pounds	10 ½ pounds	4 pounds	8 pounds	4 pounds	8 pounds	10 pounds	8 pounds	16 pounds
10 tons	5 pounds	15 pounds	6 pounds	12 pounds	6 pounds	12 pounds	15 pounds	12 pounds	24 pounds
20 tons	7 pounds	21 pounds	10 pounds	20 pounds	10 pounds	20 pounds	25 pounds	20 pounds	40 pounds
25 tons	8 pounds	24 pounds	12 pounds	24 pounds	12 pounds	24 pounds	30 pounds	24 pounds	48 pounds
30 tons	8½ pounds	25½ pounds	13½ pounds	27 pounds	13½ pounds	27 pounds	34 pounds	27 pounds	54 pounds
35 tons	9 pounds	27 pounds	15 pounds	30 pounds	15 pounds	30 pounds	37 pounds	30 pounds	60 pounds
40 tons	9½ pounds	28½ pounds	16 pounds	32 pounds	16 pounds	32 pounds	40 pounds	32 pounds	64 pounds
50 tons	10 pounds	30 pounds	18 pounds	36 pounds	18 pounds	36 pounds	45 pounds	36 pounds	52 pounds
75 tons	12 pounds	36 pounds	23 pounds	46 pounds	23 pounds	46 pounds	58 pounds	46 pounds	92 pounds
100 tons	14 pounds	42 pounds	28 pounds	56 pounds	28 pounds	56 pounds	70 pounds	56 pounds	112 pounds
200 tons	18 pounds	54 pounds	42 pounds	84 pounds	42 pounds	84 pounds	105 pounds	84 pounds	168 pounds