Patent ID: 8140274
Filing Date: 2012-03-20
Classification: F04B

Abstract:
1. A method for determining and adjusting the effective delivery rate of a peristaltic pump, with which liquid is delivered in an elastic hose pipe, the pump having a nominal speed, a stroke volume, and a running time, comprising: determining the pressure in the hose pipe upstream of the pump and the nominal speed of the pump; calculating the effective delivery rate on the basis of the nominal speed of the pump and the pressure in the hose pipe upstream of the pump, wherein the calculation of the effective delivery rate takes place on the basis of the nominal speed of the pump and the pressure in the hose pipe upstream of the pump in dependence on the running time of the pump, the calculating including determining a correction factor for the nominal pump speed that corresponds to a change of the effective delivery rate from the calculated delivery rate to a predetermined desired delivery rate; and changing the effective delivery rate to the desired delivery rate by adjusting the nominal pump speed to an adjusted speed determined by multiplying the determined nominal speed by the correction factor.