The new VC 900 is a powerful, versatile vacuum control unit that easily integrates with any diaphragm vacuum pump or house vacuum source. The VC 900 gives you comprehensive control over your vacuum pump application – making it simpler, safer and more reliable than ever. Lab personnel can operate the VC 900 vacuum controller using the touch display and rotary/push knob, or via PC by using the mini USB interface. The vacuum controller can be operated in four different modes: 

Evacuate: a vacuum chamber is evacuated as quickly as possible by means of the vacuum source that is connected to the control unit. If a variable KNF pump is connected to the vacuum controller, the vacuum chamber can be evacuated with variable pump capacity. 

Pressure Control: The vacuum controller controls the system pressure to the selected value (constant pressure). 

Automatic: The vacuum controller automatically finds the vapor pressure of the sample and adjusts the process pressure accordingly. (Only if a variable KNF pump is connected to the vacuum controller.) 

Function: Vacuum is controlled according to a user-entered pressure curve. Up to 10 different pressure curves can be stored.