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LEVELtrol-II Installation & Operating Instructions
Utility Functions- Volume Equations for Various Tank Geometries
STRAPPING TABLE Case
Volume = Linearize(level) /• call 32 point table to get volume •/
VERT Case
Volume = level • PI • Tank_Diameter
2
/ (4 • Vol_Conv_Factor)
HORZ case
full_volume = PI • D
2
• Tank_Length / 4
x = 1 - (level • 2)/Tank_Diameter
norm_vol = (arccos x - (x • SQRT (1- x
2
))) / PI
Volume = norm_vol • full_volume/Vol_Conv_Factor
SPH case
Volume = π • level
2
• (Tank_Diameter / 2 – level / 6) / Vol_Conv_Factor
The liquid level is related to the measured hydrostatic pressure by the
following basic relationship:
p • c
h = —————
d
h
<in>
<level unit>
p
<lbs>/<in>^2
<mass unit>/<level unit>^2
c
<in>^3/<gal>
<level unit>^3/<vol unit>
d
<lbs>/<gal>
<mass unit>/<vol unit>
The basic units of length, volume, and mass are entered by the user as text
strings. The user is required to enter the volume conversion constant when
prompted.
Example calculation:
Given:
p
4.625 lb/in^2
d
7.42 #/gal
c
231 in^3/gal
Then:
h
144 in
