I have (1) 5 in 1 monitor and (2) display units. A 06016 and a 01517. The 01517 shows we received almost half an inch of rain since last night. The other display unit shows zero (zero is correct). I also have a bridge and when I pull up the display on my PC it shows zero. The 01517 unit is not in calibration mode. Any ideas? The temp, humidity and wind speed is always different on the two displays too. I am seriously thinking the display unit has some issues. Any ideas??