# The Weighing Equipment (Non-automatic Weighing Machines) Regulations 1988, Paragraph 18


Locking or relieving gear testing
Load and weight receptors which have associated locking or relieving devices shall, when supporting one-half of their maximum load, be eased into and out of lock or relief. This action must not cause the machine, in its unlocked or unrelieved position, to give any indication or printout which is in error by more than the appropriate prescribed limit of error.
Such devices must not be able to be placed in intermediate positions.

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Source: https://www.legislation.gov.uk/uksi/1988/876/schedule/3/paragraph/18 (the official version)
Page: https://openlegislation.uk/weighing-equipment-non-automatic-weighing-machines-regulations-1988/schedule-3/paragraph-18
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.