Problems with the measurement interface of float level gauges
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Dear teachers, there are several float level gauges on the unit for measuring the interface levels; one is for a density of 1010 and another for 1150. From the DCS trend charts, the measurement data appears to be in a straight line, which suggests that the readings may not be accurate. Is it possible to measure the interface levels using these two densities? There are also float level gauges with densities of 887 and 1000, and the liquid level shows a linear pattern as well. There is also one with densities of 1070 and 1470; it could function at first, but now it also produces a straight line.
? The float level gauge you mentioned is the reed switch level gauge, right?
This post was last edited by tiger2010 on 2021-1-28 at 12:01. Oh, “a straight line…” does it mean that the float does not follow changes in the actual liquid level? Is this container only equipped with this one level indicator?
Check whether there is a problem with the float – it may be damaged, leaking, crushed, stuck, etc. The density of the float lies between the densities of the two fluids.
Remove the float and check whether the selected float is suitable for the interface
I’m a bit scared. I also chose a float-ball-based interface instrument for my setup, but it uses magnetostrictive technology, so I’m not entirely confident about it
The density difference is too small to make a float level gauge suitable; instead, a guided-wave radar level gauge should be used, which measures specific gravity by taking advantage of differences in dielectric constant
This post was last edited by QQCao on 2021-2-20 at 13:33; a reply has already been given
I agree with this point; two media with too high a density difference are not suitable for using a floating ball to determine the interface. However, in the third scenario mentioned by the original poster, it’s most likely that the float ball is damaged or stuck.