# The Measuring Instruments Regulations 2016, Paragraph 3.1


For each of the fractions measured, the maximum error value permitted under rated operating conditions according to paragraph 1.1 of Schedule 1A is the greater of the two values shown in Table 2. Absolute values are expressed in % vol or ppm vol, percentage values are percent of the true value.
Table 2
Parameter
Class 0
Class I
MPEs
CO fraction
± 0.03 % vol
± 5 %
± 0.06 % vol
± 5 %
CO2 fraction
± 0.5 % vol
± 0.5 % vol
±5 %
± 5 %
HC fraction
± 10 ppm vol
± 12 ppm vol
± 5 %
± 5 %
O2 fraction
± 0.1 % vol
± 0.1 % vol
± 5 %
± 5 %

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Source: https://www.legislation.gov.uk/uksi/2016/1153/schedule/1J/paragraph/3.1 (the official version)
Page: https://openlegislation.uk/measuring-instruments-regulations-2016/schedule-1J/paragraph-3.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.