3
~220V
：
Power switch, machine power input, AC socket, safety and switch.
：
Earthed terminal
，
used for whole instrument earthing,for safety protection.
RST
：
machine restore the initial status
，
pre-set the current output.
Circle: select menu.
SEL
：
Setup the current after the tester was reset.
S-up key
：
press the key after selecting the current; The microcomputer control to realize
all testing process.
I+
、
I-
：
Current output terminals ,I+ is the positive current; I- is the negative current.
V+
、
V-
：
Voltage input terminals, V+ is the positive voltage;V- is the negative voltage.
RS232: Universal series interface, can controlled by computer;
USB: Can output the testing results to USB.
VI. Test and Operating
1.Connection
：
Connect the testing product to the device through test terminal, joint
