The Non-Road Mobile Machinery (Emission of Gaseous and Particulate Pollutants) Regulations 1999 No. 1053

SCHEDULE 3 (Annex III to Directive 97/68/EC)TEST PROCEDURE

Appendix 2

NO_X analyser quench checks

1.9.2.  The two gases of concern for CLD (and HCLD) analysers are CO₂ and water vapour. Quench responses of these gases are proportional to their concentrations, and therefore require test techniques to determine the quench at the highest expected concentrations experienced during testing.