ISO 23431:2021
This document describes methods for determining air speed and flow direction, CO, NO and NO2 concentrations and visibility in road tunnels using direct-reading instruments. This document specifically excludes requirements relating to instrument conformance testing.
OEN:
ISO
Langue:
English
Code(s) de l'ICS:
13.040.20;
93.060
Statut:
Publié
Date de Publication:
2021-03-18
Numéro Standard:
ISO 23431:2021