Step

 Step Description

 Expected Result

 Result

 Precondition

 System is off

 Open the valves V₁ and V₂  

 Open the valves V₁ and V₂ from the GUI

 The valve V₁ and V₂ are open and enable to let the nitrogen gas pass

 WASH THE SYSTEM WITH NITROGEN

 Wash the system with Nitrogen for few minutes BY TURNING ON THE VALVE on the nitrogen tank

 One can see that there is nitrogen exit from the gas outlets

 Switch on the system

 Turn off the nitrogen

 Turn on the system from the GUI 

 THE SYSTEM IS GENERATING hydrogen and oxygen

 Burn the hydrogen

 Turn on the transformator

 The Hydrogen is burning

 Switch off the system

 Switch off the system from the GUI

 Switch off the transformator 

 The system goes down

 WASH THE SYSTEM WITH NITROGEN

 Wash the system with Nitrogen for few minutes BY TURNING ON THE VALVE on the nitrogen tank 

 All the hydrogen existing in the pipe system exit

 Postcondition

  System is off