VACUUBRAND CVC 2II - Manual (Page 13)

page 13 of 36
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check
carefully the validity of this document with respect to his product. manual-no.: 997835 / 15/12/2009
➨ Set hysteresis Δp by using keys Δp▲ or Δp▼:
☞ Set mode is activated by pressing key shortly: Set Δp ap-
pears.
☞ Short tips toggle in steps of 1 mbar.
☞ Continuous pressing activates ramp: Hysteresis Δp changes
with increasing speed.
Continuous pumping
Pumping down until the ultimate vacuum of the pump is
attained (e. g. pump down to dry the system from volatile liq-
uids):
If the controller is in mode two-point control:
➨ Press key MODE to change to continuous pumping.
☞ Mode change is only possible if the process control is inac-
tive.
☞ The two-point control display disappears.
MODE
➨ Start: Press key START/STOP.
☞ Arrow down and valve and/or pump symbol are flashing.
➨ Stop: Press key START/STOP.
➨ Selecting the set point by using keys p▲ or p▼.
☞ Set mode is activated by pressing key shortly: Set p ap-
pears.
☞ Short tips toggle p in steps of 1 mbar.
☞ Continuous pressing activates ramp: set-point p changes
with increasing speed.
☞ Changing set point p leads at the same time to an automatic
preselection of hysteresis
Δp.
☞ Hysteresis Δp can be manually changed at any time similar
to p by using keys
Δp, see ”Manual setting of hysteresis
Δp”.
Two-point control
Manual setting of set point p (boiling point)
➨ Start continuous pumping.
☞ Switch over to continuous pumping by pressing key MODE
if controller is in two-point control mode.
☞ Mode change is only possible if process control is inactive.
Display two-point control disappears.
MODE
Semiautomatic determination of set point p (boiling point)
START
STOP
p 267
mbar
Δ Δ Δ Δ Δp 67
mbar
Manual setting of hysteresis
ΔΔΔΔΔp