May 2016
Reference Manual
00809-0100-4530, Rev DD
316
The standard version of a Rosemount 5300 Series Level Transmitter can be configured for
static compensation of vapor by manually entering the dielectric constant of vapor, see
“Dielectric constant settings” on page 314
. For applications with a varying pressure and/or
temperature, certain models of the Rosemount 5300 Series have a built-in function
(Dynamic Vapor Compensation) that automatically compensates for varying vapor
dielectric constants.
The Rosemount 5300 uses a reference reflector mounted on the probe at a certain distance
to estimate the dielectric constant of the vapor. The transmitter knows where the reference
reflector pulse should have been if there were no vapor present. However, since there is
vapor in the tank, the reference reflector pulse will appear beyond the actual reflector point.
The distance between the actual reflector point and the apparent reflector point will be
used to calculate the vapor dielectric constant. The calculated dielectric constant is then
dynamically used to compensate for changes in vapor dielectric constant, resulting in a final
accuracy down to ± 2% of measured distance (ullage). The accuracy may be reduced to ± 6%
in certain conditions, such as rapid changes in temperature, pressure, and dielectric
constant.
C.8.1
Check if Dynamic Vapor Compensation function is
supported
To check if the Dynamic Vapor Compensation function is supported, do one of the
following:
Check that 3V or 4U is mentioned in the model code on the transmitter head.
Model Code:
530xxxxxxx
3V
xxxxxxxxx
or
530xxxxxxx
4U
xxxxxxxxx
Check the
Device Software Configuration 2
list in Rosemount Radar Master (RRM).
a. Start Rosemount Radar Master (RRM) and connect to device.
b. Right-click on the device and select
Properties
.
c. Check that “Vapor Compensation” is mentioned in the
Device Software
Configuration 2
list.
In Field Communicator, if Vapor Compensation is supported, it can be found with the [3, 2,
2, 1] HART Fast Key Sequence.
Note
Vapor compensation is supported for Product Level measurement mode only.
Vapor
Compensation
Содержание 5300 Series
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