Why use signal conditioners?
We need signal conditioners to ensure accuracy, transmission, and signal type are compatible with the rest of the control system. Typical tasks of a signal conditioner include conversion, isolation, amplification, filtering, and linearization of analog temperature sensor signals (thermocouples and RTDs). Signal conversion: Signal conversion changes an analog signal from one electrical form to another, allowing equipment with dissimilar signals to communicate. If a new field transmitter outputs 4-20mA and the older controller accepts only a 0-10V input, you must convert the signal from the field. Those signal conditioners accepting several different input signal types and producing different signal outputs are universal signal converters. Signal amplification: Low-level signals, like thermocouple signals, are often small. Signal conditioners boost the level and can linearize the incoming signal to a range the controller can easily read. Also, using an external signal conditioner located
