Note:    Switch on the computer host, the Status of Probe Rod interface will be displayed as shown in the above figure; 
switch on the probe rods, and then put them on the place where is 15m away from the main unit; observe if the 
communication  is  normal  and  if  there  is  Red  Cross  on  the  interface  (Red  cross  indicates  abnormal 
communication, and green tick indicates normal communication).