| 摘要 |
A magnetic flow transmitter (20) provides a coil driver output (46) at a selected fundamental to a coil (48) on a flow tube (22, 42) carrying a flow of a liquid (21). An amplifier (60) amplifies an electrode signal from the flow tube (42) and an A/D converter (66) converts the amplified electrode signal. A digital signal processor (DSP) (70) uses a spectral transform such as a Fourier type transform to generate a flow output (80) based on spectral components at or near the fundamental and a noise diagnosing output (82) based on components at or near a noise frequency. |
