KNF SC 950, Руководство по эксплуатации

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Assembly and function Vacuum Pump System SC/SEM/SH/SR950
14 Translation of original Operating Instructions, English, KNF 125549-125552 07/18
The vacuum pump system generates a vacuum that can be con-
trolled either through the hand terminal (see Fig. 2/
4 , p. 13) or a
PC.
Collection flask (Fig. 2/ 9 ) collects on the suction side of the pump
particles and drops that were, contrary to the requirements of the
pump, suctioned from the vacuum chamber. The collection flask is
coated (implosion protection) and fastened to the vacuum pump
system via a flask clip (
7 ).
The high-performance condenser ( 3 ) at the pump outlet once again
recollects solvents from the pumped gas instead of allowing it exit
into the environment or fume hood. The high-performance con-
denser is surrounded by a shell for temperature insulation and
explosion protection.
Solvents deposited in the high-performance condenser are col-
lected in the coated (for explosion protection) collection flask (
8 ). A
flask clip ( 7 ) secures the glass flask to the condenser flange. A
recirculating cooler or continuously flowing cold water (or another
cooling media) cools the high-performance condenser to the
condensation temperature.
5.1.2. Vacuum pump system functions
The vacuum pump system can be operated in four different modes:

Evacuate
The vacuum pump system evacuates a vacuum chamber with
adjustable pump capacity.

Pressure control
The vacuum pump system controls system pressure to the set-
point pressure value (constant pressure).

Automatic
The vacuum pump system independently finds the sample's
vapor pressure and adjusts process pressure accordingly.

Function
The vacuum pump system controls 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 time points after starting the
process
−
Coolant valve (accessory) ON and OFF with time point
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
pressure, the program goes to the next function step.