If you can not draw the graph,please Copy the "NTGraph" to C:\WINDOWS\system32


USB driver:

ETTA, EFG V5.2, EFGE V3.1, EFGS V3.8 the version below
install the USB driver 1

EFG V5.2, EFGE V3.1, EFGS V3.8 , above version and all the ETTB, ECT,ETTC 
install the USB driver 2 

