I just got a Fluke TIR32 and I am learning how to run it. It was purchased second hand with unknown history.
It seems to work very well and has excellent sensitivity to small temperature differences.
It has one issue. It over reads temperature by quite a bit ie 20c. (35f)
When it is first turned on, the error is less, maybe 8-10c but it gets worse as it warms up.
Any Ideas? Am I doing something wrong or does it need a calibration?