The float of the DLC3000 maintains a constant output current during zero calibration
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This post was last edited by h2o0 on 2019-12-21 at 15:40 regarding Fisher’s float level gauge, model DLC3000. What is measured is the liquid level, with water as the medium. A problem occurred during calibration: the liquid level was drained, and the zero point was calibrated using HART; the device indicated that zeroing was successful on the 475 unit, with a current reading of 4.0 mA. But when a wire was disconnected and a multimeter was connected in series, the current measured remained at 7.3 mA. After calibrating the range with the tank filled to capacity, the multimeter showed an output current of 15 mA. Gentlemen, has anyone ever encountered this situation?
This is a bit complicated; I suspect there’s an issue with the multimeter. Try using another one? ? 2. Is the range setting of the level gauge correct?
For such issues, it is mainly necessary to analyze them on-site, in light of the actual situation.
There’s a problem with the multimeter; try using another one.
There’s a switch button below the table header – have you turned it on? That CAL button! Look carefully
I’ve encountered this: after the 475 upgrade, during verification, there is an option asking whether the current output should change in accordance with the liquid level, and the operator needs to confirm this.