ARE THERE ANY EPA APPROVED METHODS FOR NOX MEASUREMENTS?
There are two EPA approved methods: • Reference Methods 7A through 7E (see 40CFR60 App. A). Method 7E regulating the use of chemiluminescent analyzers is the most commonly used. • EMTIC CTM-022 Conditional test Method for Electrochemical analyzers. The accuracy requirements for both methods are approximately the same. The procedures for the two methods differ in addressing the special requirements of the two different technologies. The ENERAC models 3000 & 3000E meet fully the requirements of CTM-022.
