... 3.2 Instruction for the wiring connection on the back of panel A: the plug of ionization gauge (4 PIN ... ) ---correspond with ionization unit Instruction of the cable conductor: the end of apparatus-------------- the end of vacuum gauge (1, 2, 3 ... of resistance gauge 1 (5 PIN): corresponds with resistance unit Instruction ... 3, 4) correspond with (1, 2, 3, 4)D: Analog output (9 PIN)E: RS----232 (9 PIN ...