| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for controlling an analog-to-digital converter, dynamically changing the resolution of the A/D converter on the basis of a measured value of an analog input signal.SOLUTION: A process variable transmitter (10) is used to measure a process variable, and, in doing so, dynamically changes the resolution of an A/D converter (18) on the basis of the measured value of an analog input signal. The dynamic change can be performed by automatically adjusting the configurable resolution gain adjustment on the basis of the value of the analog signal being measured, by normalizing the input signal being measured so that it is centered in an optimal resolution range of the A/D converter (18), or by adjusting a voltage reference provided to the A/D converter (18). |
