Emerson 5301HxxxxxxxxxxxxxxZZ Series Reference Manual page 406

Advanced configuration
April 2019
The standard version of a Rosemount 5300 Level Transmitter can be configured for static
compensation of vapor by manually entering the dielectric constant of vapor, see
the vapor dielectric
certain models of the Rosemount 5300 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.
D.6.1 Check if Dynamic Vapor Compensation function is
supported
Prerequisites
Note
Vapor compensation is supported for Product Level measurement mode only.
Procedure
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: 530xxxxxxx3Vxxxxxxxxx or 530xxxxxxx4Uxxxxxxxxx
• Check that "Vapor Compensation" is mentioned in the Device Software Configuration 2
list.
406
constant. For applications with a varying pressure and/or temperature,
a. Start Rosemount Radar Master and connect to device.
b. Right-click on the device and select Properties.
Reference Manual
00809-0100-4530
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Rosemount 5300 Level Transmitter