SP VirTis BenchTop 2K, Руководство оператора

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VirTis BenchTop 2K, 4K and 6K Basic Operation
Revision 004, 12/09
25
© SP Industries, Inc. 2009
Preventing Glassware Breakage
•
Avoid cleaning glassware with a wire brush as metal-to-glass abrasion
creates microscopic scratches which can cause breakage.
•
Never fill a flask to more than half of its total capacity ( e.g ., a 600 mL flask
has a working capacity of 300 mL).
•
When pre-freezing samples in a storage freezer, tilt glassware at a 30° to
45° angle to increase surface area and reduce stress on the glass.
•
To prevent glass-to-glass abrasion when placing flasks in glassware
washers, do not allow contact with metal racks or other glassware.
Product Dryness End Point
You can clearly observe drying rates during manifold drying since the glassware and
product are completely visible. However, since the glassware is exposed to room
temperature, environmental moisture may condense and freeze on the cold outer
surface of the flask. This is normal.
As the product ice inside the glassware gradually sublimes, the frost on the outside of
the glassware slowly recedes and eventually disappears. By this point, approximately
98% of product moisture has been removed. You can assume drying is complete
(<1% moisture content) when the exterior of the glassware is at room temperature.
Stoppering (Optional)
The stoppering option applies pressure to partially-inserted stoppers, forcing them into
the vials while sealing the product under system vacuum. Stoppering can be operated
at atmospheric pressure or under vacuum. Stoppering must be performed with evenly
distributed vials of equal height to ensure uniform stoppering force distribution and
prevent vial shifting.
Stopper vials only after:
•
The product is fully dried.
•
The vacuum system is turned off.
•
The shelf heat control is disabled.
Note: SP Industries recommends performing a test run to ensure that you are familiar with the
stoppering process before adding your product.
The optional Stoppering system includes a manual stoppering mechanism, and
comes with either heated or unheated shelves. For more information, see Chapter 7:
Optional Components.