COLDARC TS 400 Constant Current DC Arc Welding Power Source:
Main Power Switch: Located on the top right, featuring a prominent red rotary isolator switch (with a yellow backing plate) used to turn the unit on and off.
Amperage / Current Adjustment:
The knob on the left labeled "START" (with a percentage scale from 0 to 100%) helps fine-tune the starting arc parameters.
The adjacent rotary knob labeled "AMPERAGE ADJUST" allows you to dial in your precise welding current (marked with numbers 1 through 8).
Indicator Lights & Switchgear:
Three indicator lights (typically denoting power/phase status) are positioned centrally near the top.
A mode or function selector switch sits just to the right of the indicator lights.