56.—(1) The prescribed limits of error relating to a contents gauging system or a meter measuring system shall be 0.5% of the indicated quantity:U.K.
(a)for a quantity equivalent to the minimum delivery of the system and up to twice that amount, the error shall not exceed 1% of the minimum delivery; and
(b)if, on testing with a view to passing as fit for use for trade, the errors on all the quantities indicated by the measuring equipment during the tests are all errors in excess or all errors in deficiency then, notwithstanding that they are all within the prescribed limits of error set out above, at least one error in five shall not exceed 0.3% of the quantity indicated.
(2) The prescribed limits of error relating to a dipstick measuring system shall be such that:—
(a)the lower edge of each scale mark on the dipstick (the further edge from the datum face) is within 4 mm of the true position for each quantity indicated, when tested by inserting into, or withdrawing from, the compartment a known volume of liquid in accordance with Regulation 52(1) above;
(b)the lower edge of each such scale mark is within 2 mm of the distance indicated on the calibration chart as being the distance between the surface of the liquid fuel in the compartment at any particular time and the datum surface, when tested by reference to a calibration chart in accordance with Regulation 52(2) above;
(c)the lower edge of the line referred to in Regulation 27 above is within 1 mm of the distance specified; and
(d)the height of the datum surface is within 1 mm of the height marked in accordance with Regulation 32 above.
Commencement Information
I1Reg. 56 in force at 14.10.1983, see reg. 1(1)(a)