Today I received my ET732 thremometer to replace my old ET73 that served me well. I am curious if I am doing something wrong because I cannot find a way to go down in temperature. The default temp is 176º but to set a value lower you have to press and hold throught 512º to get back to 140º. This just does not seem right as almost all cooking temps are less than the default. Can the default value be changed?