# The Measuring Instruments Regulations 2016, Paragraph 2.6: Conversion devices


MPEs on converted indications due to a conversion device are equal to ± (A — B), A and B being the values specified in Table 2.
Parts of conversion devices that can be tested separately
(a) Calculator
MPEs on quantities of liquid indications applicable to calculation, positive or negative, are equal to one-tenth of the MPEs as defined in line A of Table 2.
(b) Associated regulated measuring instruments
Associated regulated measuring instruments shall have an accuracy at least as good as the values in Table 4:
Table 4
MPE on Measurements
Accuracy classes of the measuring system
0.3
0.5
1.0
1.5
2.5
Temperature
± 0.3 °C
± 0.5 °C
± 1.0 °C
Pressure
Less than 1 MPa: ± 50 kPa
From 1 to 4 MPa: ± 5 %
Over 4 MPa: ± 200 kPa
Density
± 1 kg/m3
± 2 kg/m3
± 5 kg/m3
These values apply to the indication of the characteristic quantities of the liquid displayed by the conversion device.
(c) Accuracy for calculating function
The MPE for the calculation of each characteristic quantity of the liquid, positive or negative, is equal to two fifths of the value fixed in (b).

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Source: https://www.legislation.gov.uk/uksi/2016/1153/schedule/1F/paragraph/2.6 (the official version)
Page: https://openlegislation.uk/measuring-instruments-regulations-2016/schedule-1F/paragraph-2.6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.