If you are using Pentosin Super DOT 4 brake fluid it has, per specs, a BP of 265°C and a wet BP of 165°C. If your brake fluid is reading a BP of 182°C, then yeah time to change it.
http://www.pentosin.net/specsheets/P...SuperDot_4.pdf
Never heard of a Farcom DF.16 tester. Misspelled, should be Facom. You spent some bucks, even used not cheap.
https://www.ebay.com/itm/FACOM-DOT-T...75.c100623.m-1