Triggered remote function calls can be used in master-slave systems to trigger slave-side software functions pre-loaded by a master into slave MCU memory, with associated parameters pre-loaded into a slave function interface memory. One theoretical value for the NOx downstream of the SCR-catalyzer is compared to an actual NOx-value downstream of the SCR-catalyzer. A plurality of sockets are mounted to the bottom portion of the socket mounting plate assembly. The preferred polyamide is nylon, and particularly nylon 6. In this way, the inner and outer sets of conductive spokes are electrically connected together, the combination of the inner and outer set of spokes with the conductive enclosure having a fundamental resonant frequency inversely proportional to the height of the conductive enclosure and the lengths of the inner and outer set of conductive spokes. Or if the one or more parameters do not comply with the one or more rules, an indication thereof may be provided.