Specifications Relating to Non-automatic Weighing Devices (1998) (SI/98-81)

15. With respect to automatic indicating devices, the addition or removal of a load equivalent to 1.4 times the actual scale interval to or from the weighing and load-receiving element shall cause a change of

• (a) in the case of an analogue indicating element, at least one actual scale interval; and

• (b) in the case of a digital indicating element, two actual scale intervals.

• 16. (1) Under stable environmental conditions, the deviation from zero as soon as the weight indication has stabilized following the removal of a load that has remained on a weighing and load-receiving element for up to 30 minutes shall not exceed

  • (a) in the case of a single range weighing device, one-half of the verification scale interval;

  • (b) in the case of a multiple range device, one-half of the verification scale interval for the range being tested; and

  • (c) in the case of a multi-interval device, one-half of the smallest verification scale interval.

• (2) In the case of a multiple range device, following the removal of a load greater than the maximum capacity of the first range, which load has remained on the weighing and load-receiving element for up to 30 minutes, and immediately after switching the device to its lowest weighing range, the indication near zero shall not vary by more than one verification scale interval of the lowest weighing range over a period of five minutes after switching the device to its lowest weighing range.

17. If a load is kept on a weighing and load-receiving element under stable environmental conditions, the difference between the weight indication obtained immediately after placing the load on the element and the weight indication observed during the following 30 minutes shall not exceed the absolute value of the applicable limits of error for that load.

18. The weight values that are indicated or recorded by the indicating and recording elements of a weighing device and any equipment and accessories attached to the weighing device or used in conjunction with it shall agree

• (a) exactly, in the case of digital values produced by electronic elements, equipment and accessories that have the same verification scale intervals;

• (b) within 0.25 times the verification scale interval, in the case of analogue values produced by elements, equipment and accessories that have the same verification scale intervals; and

• (c) within 0.6 times the largest verification scale interval or the verification scale interval common to the elements, equipment and accessories, in all other cases.

• 19. (1) The calculated value of the net weight shall equal the value of the gross weight minus the value of the tare weight.

• (2) Indicated or recorded monetary value shall equal the product, rounded to the nearest cent, obtained by multiplying the weight indication or registration by the price per unit.