The Weights and Measures Regulations 1963

68.—(1) Unless otherwise provided in these Regulations, vibrating weighing instruments shall be tested for sensitiveness by loading the instrument with the maximum testing load (or as near thereto as, in the opinion of the inspector, circumstances permit) with the beam or steelyard indicator in a horizontal position, and ascertaining that it moves with the addition of the weight to be added to test sensitiveness as specified in Parts II, III, V, VI, VII, IX or X, as the case may be, of Schedule 2 hereto. No test for sensitiveness at a lower load shall be made.

(2) In the case of beam scales and balances, the addition of the said weight to either pan shall cause an appreciable movement of the beam.

(3) In the case of vibrating weighing instruments other than beam scales or balances, the addition of the said weight shall cause the beam or steelyard indicator to rise or fall to the limit of its range of movement.