Labconco FreeZone Bulk Tray Dryer 78060 Series - Manual (Page 18)

Chapter 4: Using Your Bulk Tray Dryer
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3. Freeze the Sample - Before the freeze dry process can occur the product
must be in a frozen state. This must be done in a freezer separate from the
Bulk Tray Dryer.
4. Start the Freeze Dry System - Turn on the Freeze Dry System using the
Manual Mode. (See Freeze Dry System User’s Manual)
5. Set the Bulk Tray Dryer Temperature - Turn the Bulk Tray Dryer on by
pressing the Power Switch. Press either the Increase or Decrease button
once. The set point temperature will show on the display. This set point
temperature can be changed by pressing the Increase or Decrease button
again. The set temperature should be lower than the eutectic temperature
of the sample. If the eutectic temperature is below –20°C, do not set the
heater temperature for primary drying and do not press Run.
6. Position the Vacuum Release to Close.
7. Load Samples- Sample may be loaded after the Freeze Dry System
temperature reaches –40°C or colder. Position samples on the shelves
inside the Bulk Tray Dryer. Close the door and turn the latch.
8. Turn on the vacuum pump.
9. Start Primary Freeze Drying- Allow the vacuum to pull down to 0.133
mBar or lower. Press Run. At no time during the primary drying phase
should the product temperature be allowed to rise above the eutectic
temperature. A bar will be visible under the shelf 1 position when power is
supplied to the shelf heaters.
10. Secondary Drying- After all the free moisture is removed in the primary
drying phase, the temperature may be increased. This may be done by
pressing the Increase button.
11. Shut Down- After completion of the freeze dry procedure:
a. Press Stop on the Bulk Tray Dryer.
b. Position the Vacuum Release Valve to Open.
c. Turn off the vacuum pump.
d. Allow the vacuum to bleed. Then open the door and remove the
samples.
e. Shut off the Freeze Dry System, defrost the ice, drain the collector
chamber and dry. See the Freeze Dry System User’s Manual for
instructions.