20. A weighing device shall maintain its metrological characteristics and perform within the applicable limits of error for at least 100 000 weighings for a weighing device with a maximum capacity of not more than 1 000 kg (2 000 pounds), and for at least 300 weighings in all other cases.

• 21. (1) A portable or movable weighing device, other than a device of the freely suspended type or an on-board weighing system, shall be equipped with a permanent means of indicating when it is level, unless it is capable of performing within the applicable limits of error when tilted up to three degrees or five per cent in any direction from a level position.

• (2) An on-board weighing system shall be

  • (a) capable of performing within the applicable limits of error when tilted up to three degrees or five per cent in any direction from a level position; and

  • (b) equipped with a means to blank the weight indications and prevent the transmission, printing and storage of the weight results when the registrations are no longer within the applicable limits of error.

22. A weighing device shall perform within the applicable limits of error when exposed to the range of conditions specified by the manufacturer, as well as at any temperature, humidity, pressure, voltage, frequency or other influencing factors that may be encountered under normal conditions of use.

23. The weight indication at or near zero shall not vary by more than

• (a) in the case of Class I weighing devices, one verification scale interval for each change in temperature of 1°C;

• (b) in the case of Class IIIHD weighing devices, three verification scale intervals for each change in temperature of 5°C; and

• (c) in the case of all other classes of weighing device, one verification scale interval for each change in temperature of 5°C.

• 24. (1) A weighing device shall perform within the applicable limits of error when exposed

  • (a) where a temperature range is marked on the device, within that temperature range; and

  • (b) where no temperature range is marked on the device, at any temperature of at least -10°C and no more than 40°C.

• (2) The minimum marked temperature range on a weighing device shall be

  • (a) in the case of Class I devices, 5°C;

  • (b) in the case of Class II devices, 15°C; and

  • (c) in the case of Class III, IIIHD and IIII devices, 30°C.

25. The weight indication at or near zero on a weighing device shall not vary by more than one verification scale interval for a change in barometric pressure of 1 kPa in the barometric pressure range of 95 to 105 kPa.

26. A weighing device that operates using alternating current shall, when exposed to voltage variations from -15 per cent to +10 per cent and to frequency variations of ± 2 per cent of its marked nominal values,

• (a) perform within the applicable limits of error; or

• (b) blank the weight indication and prevent the transmission, printing and storage of weight results.