ENUsing the CV mode• Turn the CV mode on by pressing Crater fill and 2T/4T buttons simultaneously.• When the CV mode is on, the voltage is shown on the display with one of the digitsblinking (the active digit).• You can change the voltage value by pressing Gas select (decrease the active digit) or2T/4T (increase the active digit) buttons. You can change the active digit by pressingCrater fill button.• The machine is now ready for carbon arc gouging.• Exit CV mode by pressing the welding gun trigger or pressing Crater fill and 2T/4Tbuttons simultaneously.NOTE! For your safety, the CV mode turns off automatically if you use the Wire Inch button orpress the welding gun trigger.3.7 Calibrating wire feed speedTo ensure that the pre-sets and meter displays work as planned, you must calibrate the wirefeed speed of your Hiarc power source and F 10 wire feeder welding equipment.Calibration1. Start the calibration by pressing Crater Fill button for 3 seconds.2. Press Gas Test button to select either HiArc F 10 or HiArc F 30 wire feeder.3. Cut the filler wire at the contact tip.4. Press Wire Inch button at the wire feeder.• Wire feed starts and continues for 12 secondsWire Inch button1234 7891234 7658910WIRE INCHHiArc M 350A, M 500A18