A normal data logger can handle 20 to 100 input signal. (some are even capable of managing around 1000 input). Such a device is used to track the inputs from a high number of detectors or used to provide outputs to variety of screen components or actuators. With the support of the signal conditioners, the output signals from the detectors are processed to ensure it is appropriate for measuring the input signal.
Microprocessor based Data visualization Tool
Lets assume the job is to data log the temperature of a liquid in a tank at a chemical sector and also a thermocouple is placed within the tank along with the reading should be observed at a screen and listed.
The output from the thermocouple is a little voltage is a little voltage in millivolts. Signal conditioning is done in order to convert this little voltage into appropriate size present signal with noise rejection, linearization and cold junction compensation for not being at 0’C.
The output and input devices are linked to a microprocessor system via vents. Inputs may be from detectors, switches, keyboards, etc.. And the output is to screens, actuators, etc.,
microprocessor require inputs which are electronic. Thus, if the output from the detector is analogue to digital converter ADC required. Further, in the event the signal created by he detector is quite little, amplification of the signal is first done before it’s fed into an ADC. Even for electronic signs, signal conditioning might be asked to better their quality.
After appropriate signal conditioning, then the sign from the individual detectors are fed into a multiplexer. A multiplexer is circuit which may take-up inputs from numerous sources and then by choosing an input station, provide an output from only on of them.