Filter
Top Products
39
Reference Manual
00809-0100-4860, Rev BC
Section 3: Configuration
January 2013
Configuration
Density/Density ratio
When configuring a meter for mass flow units, a density value needs to be entered. When
configuring a meter for Standard and Normal Volumetric flow units a density ratio will be
required.
Density ratio
Configure the Density Ratio in one of two ways:
1. Enter Density Ratio to convert from actual flow rate to standard flow rate.
2. Enter the process and base conditions. (The Rosemount 8600D electronics will then
calculate the density ratio for you).
Note
Be careful to calculate and enter the correct conversion factor. Standard flow is calculated with
the conversion factor you enter. Any error in the factor entered will result in an error in the
standard flow measurement. If pressure and temperature changes over time, use actual
volumetric flow units. The Rosemount 8600D does not compensate for changing temperature
and pressure.
Note
Changing the base process conditions will modify the density ratio. Likewise a change to the
density ratio will lead to a change in the base process pressure (Pf).
Density ratio
Density Ratio is used to convert actual volumetric flow to standard volumetric flow rates based
on the following equations:
Calculate density ratio
Calculate Density Ratio will calculate the density ratio (shown above) based on user entered
process and base conditions.
Field Comm. 1, 3, 2, 4
Field Comm. 1, 3, 2, 4, 1
Field Comm. 1, 3, 2, 4, 1, 1
Field Comm. 1, 3, 2, 4, 1, 2
DensityRatio
density at actual (flowing) conditions
density at s dard (base)tan conditions
--------------------------------------------------------------------------------------------------------=
DensityRatio
T
b
xP
f
xZ
b
T
f
xP
b
xZ
f
---------------------------=