Division 4.2.2.2 Linear response of an analytical balanceF1

The analytical balance used to determine the filter weight shall meet the linearity verification criteria of Table A5/1 applying a linear regression. This implies a precision of at least ± 2 μg and a resolution of at least 1 μg (1 digit = 1 μg). At least 4 equally-spaced reference weights shall be tested. The zero value shall be within ± 1 μg.

Table A5/1

Analytical balance verification criteria

Measurement system	Intercept a0	Slope a1	Standard error of estimate (SEE)	Coefficient of determination r²
Particulate balance	≤ 1 μg	0,99 – 1,01	≤ 1 per cent max	≥ 0,998

Annotations

Textual amendments

F1: Substituted by Commission Regulation (EU) 2018/1832 of 5 November 2018 amending Directive 2007/46/EC of the European Parliament and of the Council, Commission Regulation (EC) No 692/2008 and Commission Regulation (EU) 2017/1151 for the purpose of improving the emission type approval tests and procedures for light passenger and commercial vehicles, including those for in-service conformity and real-driving emissions and introducing devices for monitoring the consumption of fuel and electric energy (Text with EEA relevance).