Hf-dc2 manual

11 HF pulse generator HF-DC1/42 and ZGP1/8.0-42. Before all work on the pulse generator, switch off the supply voltage and remove the mains plug! Repairs by electricians only. Weld start procedure for HF DC TIG welding. (1) Lay the outside edge of the Gas Cup on the work piece with the Tungsten Electrode 1- 3mm from the work piece. HF (high frequency) ignition allows the arc to be started in Tig welding without touching the tungsten to the work piece.