... locate and select the measurement function. High brightness vacuum fluorescent display allows the user to view clearly. Its 12 ... function%, dBm, RELRangeAuto, ManualDisplayVFD,dual displayReading modeSingle display: all measurement parametersDual display: V AC+V DC, I AC+I DC ... to set accuracyComparatorTo judge HI, IN, LO and display, with ALARM at HI/LO (selectable)Communication interface RS232C ...