Labconco FreeZone Bulk Tray Dryer 78060 Series - Manual (Page 20)

Chapter 4: Using Your Bulk Tray Dryer
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6. When all the frost has disappeared from the outer surface of the sample
container and no cold spots can be detected by handling the container, the
sample is nearly dry. To be certain of low final moisture content, dry the
sample for several hours past this point.
7. To remove a container after drying is complete, turn the plastic knob on
the valve to the “VENT” position, which closes the valve and vents the
container. Should backfilling with an inert gas be required, simply
connect the gas supply line to the vent port on the valve. The sample
container may now be removed. In the vent position the bevel on the knob
should point away from the sample port.
Valve in Vent Position
8. Ampules may be flame sealed while connected to a valve by using a
sealing torch. Care must be taken not to burn the valve. An insulation
material placed between the valve and the torch is recommended.
9. Shut off the Freeze Dry System, defrost the ice and drain the collector and
dry. See the Freeze Dry System User’s Manual.
Note location of taper on
knob in vent position