0) If target or line drop, STOP THE BEAM!!

1) If you SEE target or line current go down (top right window of monitors next to the corridor): 

Use Knobs open application (monitor below); remember set value; type 0 in set window; click Mode - Reset; click Mode - On. increase current in steps of 100 A

2) If Target or line current off and it happened a while ago

Use Knobs open application (monitor below); type 0 in set window; click Mode - Reset; click Mode - On Use Isolde Target heating GPs application (in monitor below);