Fluid pump e.g. piston pump, for use in e.g. high-performance liquid chromatography apparatus, has control unit configured such that actual volume of pumped fluid is adjusted to predetermined nominal volume of transported fluid

摘要

#CMT# #/CMT# The pump (200) has a fluid conveying mechanism for conveying fluid, and a control unit (206) for controlling the fluid conveying mechanism. The control unit for adjusting flow of the fluid is configured such that actual volume of the pumped fluid is adjusted to predetermined nominal volume of the transported fluid. The fluid conveying mechanism comprises a piston (202) moveably arranged in a displacement space (204) of the pump. The control unit controls movement of the piston, and a flow sensor (208) detects flow rate and transmits flow rate to the control unit. #CMT# : #/CMT# An independent claim is also included for a method for pumping fluid. #CMT#USE : #/CMT# Fluid pump e.g. piston pump, electrical osmotic pump or gear pump, for use in a measuring device e.g. nano or micro-fluidic measuring device, life science apparatus and liquid chromatography apparatus such as high-performance liquid chromatography apparatus, for pumping fluid to measure a sample (all claimed) e.g. biological or chemical samples, in a container. Can also be used for a supercritical fluid chromatography. #CMT#ADVANTAGE : #/CMT# The control unit for adjusting flow of the fluid is configured such that actual volume of the pumped fluid is adjusted to predetermined nominal volume of the transported fluid, thus operating the pump in an efficient manner. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic block circuit diagram of a fluid pump. 200 : Fluid pump 202 : Piston 204 : Displacement space 206 : Control unit 208 : Flow sensor.