VACUUBRAND CVC 3000 - Manual (Page 44)

page 44 of 80
Program step 1 should be always a definite initial state, here atmospheric
pressure (ATM). To reach this state definitely, set a tickmark at ”Vent.”
and ”Step” by pressing the selection knob.
In step 2, pumping begins, attempting to reach 300 Torr/mbar as quickly
as possible (”Step”). Vacuum holds there for 10 minutes (degassing the
solvent).
In step 3, ”Auto
➜
” causes an automatic search of a boiling point in
the pressure interval between 300 Torr/mbar/hPa (depending on preset
pressure unit) and 2 Torr/mbar/hPa, followed by automatic adaptation to
changes in the boiling point. The following step starts either (1) once the
cumulative process time reaches the set limit (1 hour/60 minutes), even
if the preset pressure (2 Torr/mbar/hPa) has not been reached, or (2) if
a vacuum of 2 Torr/mbar/hPa is reached, even if the preset time has not
been completed.
Step 4 vents to atmospheric pressure as fast as possible and switches off
the control after one minute.
Example 2
Vacuum pump with in-line valve and/or Vacuum-Management-Sys-
tem Module A: Pumping down with intermediate venting
Program step 1 should be always a definite initial state, here atmospheric
pressure (ATM). To reach this state definitely, set a tickmark at ”Vent.”
and ”Step” by pressing the selection knob.
Program
No hh:mm:ss Vac Vent. Step
01 00:00:00 ATM ✔ ✔
02 00:05:00 10
03 00:15:00 10
04 00:01:00 500 ✔
05 00:09:00 500 ✔
06 00:10:00 5
07 00:20:00 5
08 00:01:00 ATM ✔ ✔
09 00:00:00
10 00:00:00
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