Level migration

Newcomers, come and take a look; learn*learn*

This post was last edited by ssln123 on 2018-5-5 09:36. Negative migration: the density of the silicone oil in the capillary *9.8*0.3 gives the amount of migration, which is also the differential pressure shown when the tank is empty before migration occurs.

Is this just a flexible pressure guide tube? So what happens when the liquid level drops below the transmitter’s position?

Oh, is this a Rosemount transmitter?

1. Single flange design: the low-pressure chamber of the differential pressure gauge is connected to the ambient atmosphere, while the gauge itself is installed 30 centimeters higher than the sampling point? ! :Lol, damn it – this is an incorrect installation! . . . What the hell is there to migrate? Migrate it already. 2. Obviously, when (P_liquid – P_oil) ≤ 0, the reading of the differential pressure gauge remains constant at 0. So can you clarify whether the zero liquid level corresponding to this zero differential pressure is located above the sampling point? 3. Differential pressure gauges cannot be installed in this way in open tanks; the gauge itself must be lowered to a level lower than that of the fluid level measurement point. This ensures that the physical zero liquid level corresponds to the measurement point, and it guarantees that the height of the liquid column above the zero level is directly related to the differential pressure value. Only then does moving the differential pressure gauge have a physical basis. :lol

What kind of migration volume is that? You don’t even explain clearly what kind of silicone oil is used inside; anyway, it’s pointless. The simplest method is to install it, tighten the bolts, enter the measurement range, and then set the zero point once more at that time!