I have two Fluke 54 II Temperature meters, with a total of four pipe clamp K temperature sensors. Both meters were giving me strange readings on a lines that were 186 F and lines that were 108 F. I was getting readings, up to 400+ F then down to the mid 70s Also I started getting negative readings. I gave up on the meters, after spending way to much time fiddling with them. Then magically they started working. Anyone have a clue as to why?
BTW I was working on two ALR McQuay chillers, nothing fancy on them that could cause interference.