During RATA testing, I happened to notice evidence that the stack analyzers (e.g. NOx, CO, O2) were responding faster than the temperature.
The TI's are "Type N" thermocouples in stainless steel wells that are good to over 1800° F, but it appears they are adding considerable lag to the measured temperature, one of our primary control variables.
MPC works well as feed-forward for the incoming waste stream, but at times we would like to control the CO in the stack as well. Has anyone had success with a faster-responding temperature measurement system in an application like this? It's important that the primary TI is rugged as well - the techs don't like baking on a scaffolding when they break.
-John