Heidolph Intelligent Hei-VAC Control Operating Instructions Manual page 69

Device description
VACUU·LAN: pressure increase to switch on pressure
Vac control: preset maximum exceeded
VARIO control: pump down to set point.
Auto mode: pump down and boiling point detection within the preset
time interval regarding changing process conditions.
VARIO control: reaches and tracks boiling point. The next program step
starts when the programmed pressure has been reached or the preset
time has elapsed.
2-point control: pressure in hysteresis, pump switched on
2-point control: pressure in hysteresis, pump switched off
Turbo mode switched on (for VARIO® pump in combination with turbo-
molecular pump)
Clock
- Program completed*
- Mode VACUU·LAN: delay time elapses
Lock – operation locked
HI mode for Pump down = optimum speed for the respective pressure.
..%
Percentage value for Pump down motor speed.
Set value for Vac control.
Flashing: warning!
67