I heat treat aerospace parts at 500-1300°C. AMS2750 requires ±0.2°C or ±.05% accuracy for secondary instruments. I cannot find any instrument on earth that meets this requirement for Type S and at some temperatures of the Type K & N. I have three Fluke 5522As, Fluke data sheets states uncertainties in the ranges of .36-.37 for Type S, and .26-.4 for type K. TEGAM states their 945A meets AMS2750 secondary because their accuracy is ±.005% of reading ± 5 uv, however in the same data sheet they have maximum uncertainties for each thermouple types and uncertainity exceeds AMS2750 for Type K at all temperatures. Based on the fact these Fluke 5522a's are common in calibration labs, am I interpreting the data sheets correctly?
My 2nd question is if I am calibrating a Type S channel on an instrument and the calibrator is simply outputting a mV, how is the accuracy worse for this Type S than if I was calibrating a Type K channel?
Thanks for any advice on this, I hope I explained my situation correctly.
My 2nd question is if I am calibrating a Type S channel on an instrument and the calibrator is simply outputting a mV, how is the accuracy worse for this Type S than if I was calibrating a Type K channel?
Thanks for any advice on this, I hope I explained my situation correctly.