Operating TOPwave
46
After the microwave switches off, the vessels must remain in the oven for at least 10
minutes. After this time, all vessels can be removed (disconnect the vent tube first!) and
can be placed under a vent hood or other exhaust system for further cooling. Acid vapors
can leak out of the vessels during the cooling phase.
The vessels may only be opened after an adequate cooling period. When the vessels are
opened, their internal temperatures should not lie above 100 °C (212 °F). The length of
the cooling period depends on the heating time and the digestion temperature. The to-
tal cooling time before the vessels are opened should be at least half the digestion time
and, if possible, somewhat more than this.
The cooling-off time can be substantially reduced by cooling the digestion vessels in a
water bath. Attention should be paid here to ensuring that only the bases of the vessels
come into contact with the cooling water.
A total cooling time of at least 20 minutes is required for these vessels.
To open the vessels, hold onto the coupling cap and slowly turn the vessel clockwise.
Make sure the gas outlet always faces away from you.
As gases begin to escape from the vessel, wait a moment or slightly close the vessel
by turning it counterclockwise. Continue in this manner and gradually open the ves-
sel.
A total cooling time of at least 30 minutes is required for these vessels. The cooling-off
time can be substantially reduced by cooling the digestion vessels in a water bath. At-
tention should be paid here to ensuring that only the bases of the vessels come into
contact with the cooling water.
The vessel must be placed on the opening station and make sure the gas outlet al-
ways faces away from you.
2 Pressure vessel
3 Opening station
To open the vessels, slowly turn the vessel clockwise.
PM 40, PM 60 and PL
100 Pressure Vessel
Removing and opening CX
100 pressure vessels
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