The maximum dividing ratio depends on the maximum slot width which can be set on the bottom cone. This differs between the three bottom cones which are available.
The smallest dividing ratio depends upon the maximum particle size of the sample since the slot width should be at least 3 times wider than the maximum particle size. This means that smaller fractions can be taken from smaller particle sizes.
The slot width “X” to be set can be calculated from the ratio of the required fractional amount “QT” to the initial sample amount “QA” multiplied by the fixed pitch circumference “U” of the bottom cone (U = 795 mm for all bottom cones).
X = (QT/QA) x U
Example:
A representative sample of 200 ml is to be taken from an initial sample amount
of 5000 ml (dividing ratio 1:25). X = (200 ml / 5000 ml) x 795 mm = 32 mm. This means that the slot width must be set to 32 mm.
Please note: The sample amount should be sufficiently large to represent the initial amount. |
