Metrohm 893 Professional Biodiesel Rancimat - Manual (Page 37)

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4 Operation
893 Professional Biodiesel Rancimat
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4 Weighing in samples
NOTE
Use new reaction vessels and air tubes for each measure-
ment. Blow out the reaction vessels with nitrogen before use so
that any adhering particles are removed.
￭ Weigh in 7.5 g of the samples in each reaction vessel.
5 Mounting the accessories
￭ Hold the upper edge of the reaction vessel in your hand (e.g. in
the recess between your thumb and index finger) and rotate the
glass once.
This serves to cover the degreased glasses with a light fat film so
that the vessel covers can be removed more easily after the deter-
mination.
￭ Insert an air tube into the connector of the reaction vessel cover,
fix it with the O-ring and fasten it by screwing in the M8/M6
thread adapter.
￭ Place the reaction vessel cover on the reaction vessel. Turn the
cover in such a way that the air tube is as close as possible to the
vessel wall.
￭ Connect the Iso-Versinic ® tubing to the tubing connector of the
reaction vessel cover.
￭ Place the prepared reaction vessel in the vessel holder.
4.3.2 Preparing the determination
1 Selecting the method (StabNet)
￭ In the Workplace program part, click on the symbol within the
block A area and select a Method for block A.
￭ If required, also select a method for block B.