Custom curve linearization software curve.exe can be installed in the Extended version of all Laureate digital panel meters, counters, and transmitters, except in Laureate thermocouple and RTD meters and transmitters, which already have built-in linearization curves.
Applications. Custom curve linearization solves application problems where there is a non-linear relationship between the input and the desired reading. A common application is the volume of irregularly shaped tanks based on liquid level or pressure at the base of the tank. Custom curve linearization can be used to display temperature from the changing resistance of a thermistor. It can provide exceptional accuracy from lower cost transducers if these are repeatable.
Implementation. Linearizing is implemented in the form of 20 curvilinear quadratic segments, which provide much better accuracy than a larger number of straight line segments. The typical error will be from 0.1% to 0.01% of full scale, depending on the number of data points used for setup, the error in the data points, and the severity of non-linearities or discontinuities.
Setup of a Laureate linearizing meter or trasnmitter requires an external PC which is connected to the instrument via an RS232 or USB cable. Laurel's linearizing software can be downloaded as a self-extracting.exe file CustomCurve.exe at no charge from our Software Download Page. An RS232 or USB serial communications board is required in a meter or counter, but can be removed after programming. Also see our Custom Curve User Manual.
Three programming methods are offered: