Vacuum pump system SCC 950
Assembly and functions
Translation of original Operating Instructions, English, KNF 304771-304773 07/18
15
Function
The vacuum system controls the pressure according to the
entered pressure curve. Up to 10 different pressure curves
can be stored. The following process parameters can be
entered:
−
Setpoint pressure at various times after starting the pro-
cess
−
Coolant valve (accessory) ON and OFF with point in time
after start of process
−
Option "Jump" with time after the start of the process:
The system evacuates/ventilates to the required pressure
as quickly as possible.
−
Option "Automatic" with time after the start of the process:
Automatic detection of the boiling pressure
If the set limit pressure is reached without a vapor pres-
sure, the program goes to the next function step.
−
Option "Automatic Plus" with time after the start of the pro-
cess:
Automatic detection of the vapor pressure with subsequent
pressure reduction.
If one of the two options "Automatic " or "Automatic Plus" is
set, again only one active process can be operated on the
vacuum pump system.
At any time during an active process, you can switch to
manual
process control
. Functions for evacuation and pressure control
are available simultaneously. When activating manual process
control, the current actual pressure will be adopted as the first
setpoint pressure. In other words, process pressure will be initially
"frozen" at the current value.
For smart process control, the modes of operation
can be com-
bined as you wish
. For example, after boiling point detection in
automatic mode, the following modes of operation can be used to
specifically distill the solvent off:
Evacuate
(constant rate of evaporation for optimum utilization of the
condenser)
Function
(operation at a specified pressure ramp to achieve separa-
tion of higher boiling components)
Manual process control
(active control of the distillation via the setpoint pressure)
To change to a different operating mode, the process is stopped
and then restarted in the new mode.
The gas ballast switch (Fig. 2/
6
) can be used to open and close the
gas ballast valve on the vacuum pump system's pump (see Chap-
ter 5.3).
Gas ballast
