1.Outer DC power socket.
2.Gear selected key-press.
3.Measuring range key-press.
4.Hand-strap position
5.Power key-press.
6.Test key-press, spin to lock.
7.Display screen.
8.Measurand ground terminal connected socket.
9.Voltage input terminal.
10.Ground terminal, connecting to protect the ring electrode when testing for the cable.
11.Tested terminal socket.
12.Insert prompt symbol
