Signet 9900 Operating Instructions Manual page 55

Custom Measurements
Technical Reference for
Level, Volume, and Mass Measurement
The 9900 can automatically perform
level, volume and mass calculations:
● Pressure-to-level
● Mass
● Volume
Length
r
A
h
Pressure to level conversion:
Level = P ÷ (SG × D)
where P = Pressure
SG = Specifi c Gravity of fl uid
D = Density of water
With pressure in psi:
Level (meters) = 0.703069 × (P/SG)
With pressure in bar:
Level (meters) = 1.019715 × (P/SG)
Mass Conversion
m = D × SG × V
where m = mass of fl uid
D = density of water = 1000 kg/m
SG = Specifi c Gravity of fl uid
V = Volume of fl uid (m
× ×
m (kg) = 1000 SG V
Volume Calculations
Vertical cylinder:
V = π × r × h
2
where r = radius of cylinder
h = height of fl uid
Rectangular vessel:
V = w × l × h
where w = width
l = length
h = height
Horizontal cylinder:
V = A × L
where A = area of segment
L = length of vessel
⎡
⎛ r − h
⎛ ⎞
(
2 − 1
A = ⎜ ⎜ r × cos × − r −
⎜ ⎟
⎢
r
⎝ ⎠
⎝
⎣
where
r = radius of vessel
h = height of segment
3
)
3
⎤
⎞
)
2
h ⎟ ⎟ × 2 rh − h
⎥
⎠
⎦
9900 Transmitter 55