A common application is data logging , in which periodic measurements are made over long time periods, for subsequent graphing or analysis. A data acquisition system can also support numerous virtual instruments , which are software programs that mimic the functionality of conventional test instruments such as voltmeters and oscilloscopes. Sometimes a sensor output must be adapted to the fixed input range of an ADC with a small amount of circuitry. Examples will be added to the documentation soon. The MELD interface module has 4 inputs for voltage signals, and one input for digital frequency measurement.
Examples are thermistors and photoconductive sensors.
Other sensors produce a single absolute output. The MELD interface module handles both kinds of sensors. Especially in application development, signals can go astray. The MELD interface module is specified, designed, and tested for generous overload protection on all inputs and outputs. The MELD interface module is designed to conserve power in the interface module, sensors, and in the PalmOS device itself, for data logging tasks that can last for days or even months.