Method of Determining Parameters of a Test Fluid

An apparatus, comprising:

• one or more memories storing:
• a first data set comprising data from a plurality of output signals as a function of pluralities of first and second parameters, wherein each output signal is representative of an output signal generated at a test device reacting with a corresponding sample of a test fluid;
• and
• a second data set comprising data from a plurality of autocorrelation signals as a function of the pluralities of the first and second parameters;
• means for reading a test output signal generated at a test device by reacting the test device with a test sample of the test fluid;
• and
• one or more processors arranged to:
• apply an autocorrelation function to the test output signal so as to obtain a test autocorrelation signal;
• identify in the first and second data sets an intersection of data from the test output signal with corresponding data from the test autocorrelation signal;
• and
• determine the first and second parameters of the test sample based on the intersection.

A computer-readable medium having instructions stored thereon, wherein the instructions are configured when executed to cause a computer to:

• obtain a first data set, the first data set comprising data from a plurality of output signals as a function of pluralities of the first and second parameters, wherein each output signal is representative of an output signal generated at a test device reacting with a corresponding sample of the test fluid;
• apply an autocorrelation function to the plurality of output signals set so as to obtain a second data set, the second data set comprising data from a plurality of autocorrelation signals as a function of the pluralities of the first and second parameters;
• generate a test output signal at a test device by reacting the test device with the test sample of the test fluid;
• apply the autocorrelation function to the test output signal so as to obtain a test autocorrelation signal;
• identify in the first and second data sets an intersection of data from the test output signal with corresponding data from the test autocorrelation signal;
• and
• determine the first and second parameters of the test sample based on the intersection.