# The Measuring Instruments Regulations 2016, Paragraph 7.1.1


The effect of an electromagnetic disturbance on a water meter shall be such that:
— the change in the measurement result is no greater than the critical change value as defined in paragraph 7.1.3, or
— the indication of the measurement result is such that it cannot be interpreted as a valid result, such as a momentary variation that cannot be interpreted, memorised or transmitted as a measuring result.

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Source: https://www.legislation.gov.uk/uksi/2016/1153/schedule/1C/paragraph/7.1.1 (the official version)
Page: https://openlegislation.uk/measuring-instruments-regulations-2016/schedule-1C/paragraph-7.1.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.