초록 ▼

A method for automatic fluid flow compensation in disposable fluid analysis sensing devices is disclosed. The method is designed to keep the test conditions from sample to sample substantially unchanged. This is accomplished by using information about the preceding and/or current test measurements t

A method for automatic fluid flow compensation in disposable fluid analysis sensing devices is disclosed. The method is designed to keep the test conditions from sample to sample substantially unchanged. This is accomplished by using information about the preceding and/or current test measurements to automatically offset parameter variations of the disposable devices and the reading apparatus caused by manufacturing tolerances, wear of the mechanical parts, fluid viscosity differences and others. At each consecutive test measurement the method uses a compensation of the position of the actuating element to offset the difference between the previous test measurement and a factory pre-specified value. The method and system result, over the lifetime of the instrument, in a substantially unchanged flow of the analyzed fluid and reduction of the influence of a variety of external factors on the test measurements.

대표청구항 ▼

[ What is claimed is:] [1.] An automatic compensation method for maintaining close to a target value a mean fluid displacement of test samples in a succession of test measurements of a fluid sensing instrument which includes an actuation mechanism for the displacement of at least one fluid along a p

[ What is claimed is:] [1.] An automatic compensation method for maintaining close to a target value a mean fluid displacement of test samples in a succession of test measurements of a fluid sensing instrument which includes an actuation mechanism for the displacement of at least one fluid along a predetermined fluid path and at least one sensor, the method comprising the steps of:(a) recording the time of arrival of each fluid at the sensor by measuring an output characteristic of the sensor;(b) for each successive test measurement determining the variation of the recorded arrival time from a predetermined value; and(c) compensating, in response to the determined variation, the motion of the fluid actuation mechanism in successive test measurements to keep the mean fluid displacement close to the target value.