| 摘要 |
A method and apparatus for determining a process variable, of a primary sensor, wherein by means of the primary sensor an analog measurement signal is produced, which analog measurement signal is converted into a digital signal representing the measured variable, wherein by means of at least one secondary sensor at least one reference signal is produced, and wherein as a function of the point in time, at which the reaching of a predetermined state of the process variable, especially the reaching of a value of the reference signal. |
