| 摘要 |
<p>A process variable transmitter (10) includes a memory (16) that stores a filtered sensor value that is calculated based on a prior received sensor value and a filtered rate of change value that is calculated based on a prior rate of change value. The process variable transmitter (10) also includes a controller (14) that receives a sensor value and compares it to the filtered sensor value to obtain a rate of change value. The controller (14) also compares the rate of change value to the filtered rate of change value to obtain a deviation value, and generates an output indication, such as a sensor failure warning output, based on the deviation value. This is done within the process variable transmitter (10).</p> |
