Conversations with Fluke (service rep. and product specialist) confirm that: because this meter has the “Si” designation, it is not supported in North America. They explained that the Si meters are manufactured to the same design specification as the U.S. Fluke; however, because they are destined for the Asian market, they only measure in degrees C and not F. I have another 289 and they are identical in all other respects.
As suggested I measured the current. Both meters are the same at approx 25 ma.
I’ve been leaving the meter on a few hours at a time, as well as cycling on/off for the last couple of days, but have not been able to duplicate the snag.
Thanks for weighing in everybody.