Patent ID: 8845903
Filing Date: 2014-09-30
Classification: B01D,G01N

Abstract:
1. A method of operating a chromatography column comprising the steps of: providing a cylinder with a plunger connected to a drive system configured to provide first and second plunger speeds, said plunger moveable within a cavity of the cylinder in an operational mode, said drive system having at least one driver operably coupled to the plunger, at least one position sensor sensing a position relative to a position of at least one of the driver and the plunger; a controller in communication with the position sensor whereby the plunger initially moving at the first speed is automatically changed from the first speed at a first predetermined elevation corresponding to a position related to at least one of the driver and the plunger to the second speed by the controller; wherein at least one of the first and second speeds is a speed other than maximum speed and stopped and the second speed is slower than the first speed.