27
BÜCHI
Vacuum Controller
V-800/V-805
8.6
Distillation with pressure gradient
8.6.1
Setting of the set point and Start,
preparing a new program
Choose gradient mode (if it is not already active)
[MENU]
ð
[MODE]
ð
[GRADIENT]
ð
[PROG]
ð
[NEW]
.
The first segment can now be programmed. Each segment
is defined by a start pressure, its end pressure and the
duration.
Define start pressure. Use the
[
é
]
key to increase the
value and the
[
ê
]
to decrease the value. Confirm desired
value with
[OK]
.
Defines end pressure. Use the
[
é
]
key to increase the
value and the
[
ê
]
to decrease the value. Confirm desired
value with
[OK]
.
Define duration of segment. Use the
[
é
]
key to increase
the value and the
[
ê
]
to decrease the value. Confirm
desired value with
[OK]
.
Answer question about program end (Yes/No). Yes ends
the program, No pushes it to the next segment. Use
[OK]
to confirm answer..
Store segment, Yes/No. Use
[OK]
to confirm selection.
Yes stores the values and leads program to next segment
(or ends program), if you answer No, the segment stays in
the display and the values can be corrected by over writing.
Store program (if desired).
[OK]
, the program is stored
under suggested number,
[ESC]
, saving is ignored. In
both cases, the display changes in the basic state for the
gradient course.
Now, the controller is ready and can be started with
[RUN]
.
[SHOW]
displays the start width or current program in
graphical representation.
[PROG]
shows the start width or current program in graphical
representation.
[STOP]
ends distillation and ventilates the apparatus (unless
you have configured otherwise).
8 Operation V-805
