29
BÜCHI
Vacuum Controller
V-800/V-805
8.7
Distillation with timer
8.7.1
Setting the set point and start
Choose timer mode (if it is not already active)
[MENU]
ð
[MODE]
ð
[TIMER]
ð
[PROG]
Define distillation time. Use
[
é
]
to increase the actual value
and
[
ê
]
to decrease the actual value. Use
[OK]
to confirm
the desired value.
Define set point. Use
[
é
]
to increase the actual value and
[
ê
]
to decrease the actual value. Use
[OK]
to confirm
the desired value.
Store Program (if desired)
[OK]
Now, the controller is ready. Use
[RUN]
to start the controller.
[STOP]
ends the distillation and ventilates the apparatus
(unless you have configured otherwise).
8.7.2
Possible interventions into the regulating
process
Increase the system pressure or interrupt pressure drop in
the start phase
ð
[P
é
]
. The apparatus goes into the
hold mode and regulates back to the actual value. If
necessary, the apparatus is partially ventilated.
[ESC]
it
puts back into the
RUN
mode with the original set point.
[OK]
puts its back into the
RUN
mode with the new set
point.
Reduce system pressure
ð
[P Set]
ð
[P
ê
]
. The
apparatus goes into the hold mode and regulates further
to the actual value. If necessary, the apparatus is partly
ventilated.
[ESC]
it puts back into the
RUN
mode with
the original set point.
[OK]
puts its back into the
RUN
mode with the new set point.
Change hysteresis
ð
[dP]
. Use
[
é
]
to increase the actual
value and
[
ê
]
to decrease the actual value. A = Automatic
hysteresis. Confirm desired value with
[OK]
.
[ESC]
puts
it back into
RUN
mode with the original value.
Changes into the manual mode
ð
[Man]
. The timer
function is turned off.
8 Operation V-805
