Displacement Rate Index (DRI) Apparatus
The Displacement Rate Index or DRI is an alternative way to measure cane preparation. Traditionally cane preparation to assess shredder performance has been measured by the pol in open cells method or the preparation index (PI) method. The PI method requires tumbling of an accurately massed cane sample for 20 minutes and a sample prepared in a cold digester.
The DRI method does not require massing of the cane and the measurement time is two minutes with about ten minutes preparation time. DRI is a measure of how easily brix is extracted from a particular preparation.
More details are available in this SASTA Paper.
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