Technical data

Pressure difference = actual vacuum value at the beginning of the

measurement - current actual vacuum value

Fig.28 Intermediate valve between the drying chamber and the ice condenser

Press to finish the pressure increase measurement. The

values for the pressure difference and the measuring time are

frozen. They are indicators for the current amount of water vapor

and thus for the residual moisture content of the product.

The pressure increase measurement stops automatically when the

test time is over or when the maximum permissible pressure

increase is exceeded.

Open

intermediate valve

5.4.6. Preselection

Preselection for pressure control and air injection.

All preselections will be reactivated after:

• a phase change

• a program has been loaded

• a switch-over from “Run” to “Standby”

Fig. 29 Preselection menu

54 • LSC Control System Operating Manual Freeze Dryer ALPHA 1-4 LSC / ALPHA 2-4 LSC