Use and Care Manual

15
0
500
1000
1500
...13121110987654321
Vacuum Pressure
Measured by mTorr
Freeze Dryer Cycle
FREEZE DRYER CYCLE GRAPH
prevent oil from spurting out of the
vacuum pump and creating a mess.)
Once the freeze dryer recognizes
that most of the moisture is removed
from the material, the “Final Dry”
(see image on page 16, Figure 8)
cycle will then remain on for the
default time or a customized time
if the settings were adjusted at the
beginning of the process. When the
process is complete an audible signal
will be heard and the display will
read “Complete”.
The graph shown below provides
a representation of how the freeze
dryer operates. The numbers to the
left represent the mTorr pressure
and the number of heating cycles
are represented below. The number
of cycles will vary depending on the
moisture content and cellular structure
of the food. Different foods will have
more or fewer cycles than indicated.
Also, cycle times will vary depending
on the type of food that is being
dried, age of vacuum pump oil, and
cleanliness of vacuum pump. In order
to achieve optimal freeze drying, be
sure that your vacuum pump is working
properly. *mTorr pressures may vary
slightly from those in the graphic
representation (see graphic on page 15).
18. When the process is complete
the freeze dryer will instruct you to
“Open drain valve to vent” (Before
doing so, pull the drain hose out of
the bucket and/or check to ensure
bucket is completely empty of any
water. Opening the drain valve vents
the vacuum pressure. A hissing sound
of air lling the vacuum chamber
will be heard and then the door may
be opened, the black insulator door
pad removed, and the trays of food
removed.) and “If product is dry,
remove, and select Defrost”. Check
the material thoroughly to make sure
it is dry. If you nd that there is still