The meter measures either voltage or current.
To measure voltage, connect the voltage to the two terminals marked "Input 0-70V".
To measure current, connect the "Input 0-70V" connection with the ground symbol to the plus supply voltage for the load. Connect the "Output GND" connection to the load. You do not use the "+" connections to measure current.
CAUTION: For current measurement the circuit being measured can not have a common ground connection with the meter common or the power supply to the meter.