Emerson Rosemount 3051 Reference Manual page 48

Section 2: Installation
November 2012
Figure 2-27. Bubbler liquid level measurement example.
38
Let X equal the vertical distance between the minimum and maximum
measurable levels (100 in.).
Let SG equal the specific gravity of the fluid (1.1).
Let h equal the maximum head pressure to be measured in inches of water.
Let Range equal zero to h.
Then h = (X)(SG)
= 100 x 1.1
= 110 inH O
2
Range = 0 to 110 inH O
2
20
mA dc
4
0
inH
AIR
T
X
110
O
2
Reference Manual
00809-0100-4001, Rev JA
Installation