Minicomputer Sensor and Interface Selection

The use of a minicomputer in process controls has an interesting impact on the sensor and interface selection. For a given system accuracy, the combination of less accurate sensors and a minicomputer connecting program may achieve lower control cost. Linearization, elimination of ``backlash,´´ rate of change correction, and on-line calibration are all possible. In addition, the computer can provide mathematical operations on the sensor output and, by modeling, effectively change sensor location. The simplicity of changing programs offers a great deal of flexibility to change the type of control or sensing.