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Service Support Spirit
3.3 voltage divide port
3.3.1 arc voltage port
Portable THC (TYPE F1621) use voltage divide board to detect plasma arc voltage and torch
remaining cap collision signal. The connection as follows:
Figure 3.11 voltage divide board port and wiring
When THC detect plasma arc voltage, it detect plasma by voltage divide circuit. After arc
voltage(which plasma output )/100, import it into THC mainframe. As shown above:
ELECTRODE port（the screen printing word named ELECTRODE in PCB） connect with
plasma arc voltage cathode.
WORK port（the screen printing word named WORK in PCB）connect with plasma arc
voltage anode.
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