| 摘要 |
<p>An electromagnetic flowmeter signals a measure of flow rate by controlling the current in a sensing loop. Power for the flowmeter is derived from the current in the sensing loop. To ensure that sufficient power is available at low flow rates to obtain an adequate signal to noise ratio, the current characteristic is inverted as compared to the conventional sense, so that maximum current signifies, and is available to provide power, at minimum flow rates. <IMAGE></p> |
