VACUUBRAND VNC 1 User Manual
Page 19
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.: 999118 / 16/12/2009
page 19 of 35
r
a
b
m
n
i
p
5
0
1
0
5
0
8
0
0
1
0
0
2
0
0
5
0
0
7
0
0
9
0
0
0
1
ΔΔΔΔΔ
r
a
b
m
n
i
p
)
s
e
u
l
a
v
d
e
t
s
e
g
g
u
s
(
2
2
5
8
9
7
1
0
4
5
5
1
7
8
7
•
Vacuum control of a vacuum pump (with isolation valve if on hand)
Settings in the program menu:
☞ Preset pressure (p Set): Lower pressure value for two-point control (displayed by a short tip on
key
▲).
☞ Hysteresis (Dp): Control range of the two-point control.
☞ Switch-off time (t Off): The duration of the process (vacuum control) can be preset. If the pump is
switched off due to surpassing of a pressure limit (Limit), the switch-off time is without function.
☞ Maximal pressure (Limit): Shut down of the pump when the ”Limit” value is exceeded, e.g. at the
end of filtrations or extractions (active only after the pressure did fall below the preset pressure for the
first time).
Suggested values for the hysteresis
Δp are stored in the controller (setting: ”Auto”) and are adapted
automatically to the preset pressure values. It is possible to adjust the parameters manually.
Program menu in basic mode pControl with a VARIO pump
pControl
p Set
pControl
Frequen.
pControl
t Off
p Set
25mbar
Frequen.
0 Hz
t Off
off
1013mbar
Start
Esc
pControl
Limit
Limit
1060mbar
•
Vacuum control with a speed controlled pump
☞ Preset pressure (p Set): Exact vacuum control according to a preset pressure value.
☞ Frequency (Frequen.): Sets the pumping speed when the preset pressure is decreased manually.
Only valid for pumps with frequency control (VARIO).
☞ Switch-off time (t Off): The duration of the process (vacuum control) can be preset. If the pump is
switched off due to surpassing of a pressure limit (Limit), the switch-off time is without function.
☞ Maximal pressure (Limit): Shut down of the pump when the ”Limit” value is exceeded, e.g. at the
end of filtrations or extractions (active only after the pressure did fall below the preset pressure for the
first time).
Adapting parameters during the regulation:
•
Interruption: Press key ”Enter”, the control stops, after releasing the key, the control is continued.
During the interruption the preset pressure can be set to the actual pressure by pressing the key
▼ and
by pressing the key
▲ the hysteresis is set. Performing both tasks in a row results in hysteresis 0 =
Auto, because the preset pressure as well as the hysteresis are set to the same pressure value.
•
Decrease of preset pressure: Keep key
▼ pressed for more than 2s.
•
Increase of preset pressure: Keep key
▲ pressed for more than 2s.
↵
↵↵
↵↵
↵
↵↵
↵↵
↵
↵↵
↵↵
↵
↵↵
↵↵