TOPwave Operating
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digestion vessel with the sample and remain there during digestion. After digestion and
thorough cleaning with distilled water they can be reused.
Add the acid mixture. Observe the maximum and minimum filling quantity, which de-
pends on the vessels (see section "Technical Data" p. 71). After adding acid it is recom-
mended to leave the digestion vessels approx. 10 - 20 min openly. Reactions already ta-
king place can fade away at this time.
Visually inspect the rupture disc. In case of extensive traces of corrosion or other vi-
sible damage to the rupture disc, it must be replaced for safety reasons. A bulge in
the center of the rupture disc after use is normal and will not affect its functions.
Make sure the rupture disc is properly seated in the locking lid, that is, that its edge
sits uniformly in the lid groove.
When using a TFM-PTFE lid/rupture disk combination of the type offered especially for
digestion processes subject to maximum cleanness requirements, the rupture disk is not
required.
1 Rupture disc
2 Lid
Each time, prior to locking the digestion vessels the sealing lip on the locking lid must be
dilated. Attention should be paid that expansion is uniform in order to guarantee opti-
mal tightness of the vessels, even at the maximum internal pressure within the vessels.
Expand the sealing lip the molded part in gentle circling movements.
Adding acid
Controlling and inserting
rupture disc
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