Proposal from GRPE to correct and clarify the text and to introduce linearity requirements for humidity sensors to address humidity content measurement for the calculation of the specific exhaust emission.
19. The representative from OICA introduced ECE/TRANS/WP.29/GRPE/2021/13 and ECE/TRANS/WP.29/GRPE/2021/14 proposing to amend the 05 and 06 series of amendments to UN Regulation No. 49 respectively correcting and improving some provisions with respect to humidity and hydrocarbons measurements. GRPE further modified ECE/TRANS/WP.29/GRPE/2021/13 and ECE/TRANS/WP.29/GRPE/2021/14 during the session as reflected in Annexes IX and X of the session report respectively.
20. The representative from the Netherlands raised two questions on referencing ISO standards in UN texts and some clarifications about the use of helium in flame ionization detectors (FID).
21. The secretariat described the existing collaboration with the ISO secretariat and clarified how ISO standards might be referenced in UN documents. The representative from OICA further explained that helium is now difficult and expensive to acquire as the main reason to request for an alternative option to measure hydrocarbons. The representative from the EC supported this proposal.
22. GRPE requested the secretariat to submit Annexes IX and X to WP.29 and AC.1 for consideration and vote at their November 2021 sessions as draft Supplement 11 and 7 to the 05 and 06 series of amendments to UN Regulation No. 49 respectively.