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Arif S. Hashmi
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Join Date: Nov 2011
Posts: 19

Suppression & Elevation

12/05/2011 4:15 AM

I just want to know about Suppression and Elevation in the sense of defination when measuring Liquid Level ?
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#1

Re: Suppression & Elevation

12/05/2011 4:24 AM

The suppression and elevation of what, exactly?

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Arif S. Hashmi
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Join Date: Nov 2011
Posts: 19
#2
In reply to #1

Re: Suppression & Elevation

12/05/2011 4:29 AM

Using a DP cell transmitter to measure indirectly the level of any column.
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lyn
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#3

Re: Suppression & Elevation

12/05/2011 4:35 AM

Elevation & Suppression

If the d/p cell is not located at an elevation that corresponds to 0% level in the tank, it must be calibrated to account for the difference in elevation. This calibration adjustment is called zero elevation when the cell is located above the lower tap, and is called zero suppression or zero


Figure 7-5: Click on figure to enlarge.

depression when the cell is located below the lower tap. Most d/p cells are available with elevation and suppression ranges of 600% and 500% of calibrated span, respectively, as long as the calibrated span does not exceed 100% of the upper range limit of the cell.

From:

Pressure/Density Level Instrumentation
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