Filter
Top Products
62 Micro Motion 7829 Viscomaster
®
and Viscomaster Dynamic
™
Viscosity Meters
Calculated Parameters
where K
0
and K
1
are known as the API factors.
Hydrocarbon group selection
The hydrocarbon group can be selected as:
• General refined products
• General crude products
• User defined
K
0
and K
1
are programmed into the meter for the first two groups. For refined products the values of
K
0
and K
1
are automatically selected according to the corrected density:
For Crude Oil the API factors are:
User defined factors can be entered as any sensible value.
Density / pressure relationship
Isothermal secant compressibility can be defined by the simplified equation:
• where liquid volume changes from V
0
to V
1
as the gauge pressure changes from zero
(atmospheric) to P
1
•where
β = Isothermal secant compressibility at temperature t
δV
1
= Change of volume from V
0
to V
1
P
1
= Gauge pressure reading (P - 1.013) bars
• hence
•where
ρ
0
= Corrected density at zero (atmospheric) gauge.
ρ
1
= Uncorrected density (Kg/m
3
)
P
1
= (P - 1.013) where P is pressure in bars (P - base)
Hydrocarbon Group
Density Range
(kg/m³) K
0
K
1
Gasolines 654 to 779 346.42278 0.43884
Jet Fuels 779 to 839 594.54180 0.0000
Fuel Oils 839 to 1075 186.9696 0.48618
Product K
0
K
1
Crude oil 613.972226 0.0000
t
1
1
0
P
V
V
1
⎥
⎦
⎤
⎢
⎣
⎡
δ
=β
1
1
0
P1 β−=
ρ
ρ