How accurate/ useful is the built-in diagnostics on PX/ QX ranges of control panels?
We design these control panels to leave the factory with only a 2% error in any voltage/resistance readings. We also provide a method of calibrating the system, so that the measurements can be more accurate, achieving <1% error in most cases. We would always recommend that the diagnostic readings are used as part of system testing, as they cover all of the vital measurements most engineers will do as part of regular maintenance.