It has been a long time since I was involved with such testing, but I believe that there is a requirement to list all test equipment used along?with Model,?Serial Number and Calibration Date on the submittal. ?As such, the submission probably would not be approved using ¡°hobbyist¡± gear.
I believe that some folks have and would use the Tiny SA products for pretesting during design process¡
(Calibrations might also?have to be traceable to NIST in the USA.)
Larry McElhiney