Signal Conditioners Revisited, Part 2

摘要

In this issue, I'll pick up my column on signal conditioners. As I noted previously (June 2008), some of the little boxes wired or attached to parts of your process could be signal conditioners. They all have inputs and outputs and commonly perform some functions not being done by the rnain control system. They may have been added as new control requirements show up. There are several methods of signal conversion. I covered thermocouple, millivolt and multiple mixed inputs and outputs previously.