This Part of EN 13284 specifies specific requirements on automated measuring systems (AMS) for dust monitoring. It is derived from EN 14181 which is the general document on the quality assurance of AMS. It is only applicable in conjunction with EN 14181. This part of EN 13284 specifies test criteria for the QAL1 and specific requirements for QAL2, QAL3 and AST for dust AMS used for proving that the dust emissions from a source are compliant with emission limits below 50 mg/m3 (standard conditions) in ducted gaseous streams. This part of EN 13284 is applicable by direct correlation with the standard reference method (SRM) described in EN 13284-1.This part of