I just picked up the 1089 yesterday. I have a month to return it, but so far the wireless transmitter works great. I put it in Freezer and watched the base unit track the drop in temp. Now I need to do a salt test and confirm that the humidity is right on. Stupid question, but how and what do you look for, from a salt test? I think I remember the humidity should be at 75%, but how do you set up the salt test?
BTW, this thing has a max and min memory for the ranges of temp and humidity!