SP VirTis BenchTop 2K, Руководство оператора

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Optional Components VirTis BenchTop 2K, 4K and 6K
32 Revision 004, 12/09
© SP Industries, Inc. 2009
Filter Trap
VirTis filter traps protect your vacuum pump from damaging and corrosive vapors
released during freeze-drying. If purchased, the filter trap is located on the side of
your freeze dryer, near the vacuum pump.
Disposable Sodasorb and activated charcoal drop-in wire mesh cartridges are
available and must be purchased separately.
To install the filter trap:
1. Connect the vacuum pump to the port marked OUT.
2. Connect the rest of the system to the port marked IN.
3. Turn the handle fully counterclockwise to activate the filter trap. The inlet and
outlet ports will open.
4. To turn off the filter trap, turn the handle fully clockwise. The inlet and outlet
ports will close, breaking vacuum from inside the housing.
Degassing Filter Trap Cartridges
Filter trap cartridges are highly absorbent and may require degassing prior to freeze-
drying. If you do not degas filter trap cartridges, vacuum pump-down may take
significantly longer. Degassing is also necessary each time you change your filter trap
cartridge. Most filters need to be degassed overnight in order to allow proper vacuum
to be established.
To degas the filter trap cartridge:
1. Unscrew the clear polypropylene housing from the white plastic top.
2. To begin degassing, enable the vacuum pump, open the gas ballast valve
slightly and close all ports.
3. Degassing is complete when vacuum reaches 50 mT, or less. Close the gas
ballast.
Note: Degassing may take between 12 and 24 hours.
Filter trap cartridges are disposable. Their lifespan depends on frequency of use and
the volume of contaminants they absorb. The Sodasorb cartridges contain an
“Absorbent Exhaustion Indicator,” which turns purple to signify the need for
replacement. Full exhaustion is indicated by a deep purple color.
The activated charcoal cartridges contain no absorption limit indicator. Pump oil must
be routinely checked for clarity to assess the charcoal’s absorbing capacity.
Depending on the usage and concentration, changing the charcoal cartridge every
three to six months may be sufficient.