A precision piston transducer ensures accurate measurement of piston stroke when determining MVR. The contact point is very close to the piston, minimizing possible angle errors from the outset. The accuracy with which the flow rate is determined in Method B depends on the synchronization of the time-travel data pairs and on the accuracy of the time determination. As both measured quantities (time and travel) are available in digital form from the outset, there is no need for analog to digital conversion. This also eliminates synchronization errors. Quartz accurate time measurement also enables measurement of materials with high flow-rates.
Melt index testing of plastic granulate
Components made of thermoplastics must meet certain requirements. Quality assurance therefore begins with measuring the flow rate of granulate following delivery. The portfolio of ZwickRoell testing instruments developed for this purpose ranges from a manual tester to Aflow - the fully automatic all-round solution with electromechanical force control.