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1 A
BOUT THE
The system includes an anvil and piston inside a steel, open-ended sample tube. The piston and
anvil have O-ring seals against the inside of the tube. A brass plug covered with filter paper is placed
on the anvil, the sample tube is positioned over it, a powdered sample is loaded into the tube, and a
second brass plug with filter paper is placed on top of the sample. The piston is driven down by a
stepper motor to compress the sample. Constant head pressure is maintained throughout the
analysis by controlling the flow rate with a mass flow controller (MFC). After passing through the
sample, the gas passes through a flow restrictor to maintain some back pressure. Particle size is
calculated from the differential pressure across the sample according to the Kozeny-Carman
equation. Ambient temperature is used to calculate air viscosity, which is used in the particle size
calculation.
The emergency stop button powers off the stepper motor in case of an emergency.
A safety shield is placed around the piston and anvil area during operation.
MIC SAS II 5800 Operator Manual
580-42800-01 (Rev - ) — June 2019
MIC SAS II
1 About the MIC SAS II
1 - 1
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