NETZSCH LFA 447 Nanoflash, Руководство по эксплуатации

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System Components
LFA 447
TM
01/09 J:\LFA447\CHAPTER3.DOC
14
drop of liquid
pipette
•
Insert a drop of the liquid into the crucible. The
volume of the drop should be 50 -60 µl. By
known density of the liquid sample it is possible
to determine the volume via measurement of
the sample mass. It is also possible to use a
pipette.
Please pay attention to the indications for the
filling level:
ideal liquid level
ok
excessive
Oil or hydrocarbons are often difficult to be placed inside a crucible. They form no pearl
but creep along he crucible walls. This will cause higher deviations in the measuring results.
The reason for this is the low surface tension. We recommend in such cases not to drip the
sample in the crucible but to place the sample with the help of a pipette from the bottom
to the lid. When the sample "hangs" at the lid, the lid can be placed on the crucible.
lid
•
Put the lid onto the crucible and ensure that it
is level.