Emerson Process Management ROSEMOUNT 5300 - Manual (Page 264)

Reference Manual
00809-0100-4530, Rev BA
July 2009
Rosemount 5300 Series
C-16
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 and eliminates the need to do any compensation in
the control system.
To check if the Dynamic Vapor Compensation function is supported, do one of
the following:
• If probe type 4U or 4V is mentioned in the model code on the label, the
device supports Vapor Compensation.
Model Code: 530xxxxxxx4Uxxxxxxxxx or 530xxxxxxx4Vxxxxxxxxx
• In RRM:
1. Connect to the device.
2. Right click on the device and select Properties.
Figure C-13. Check if Dynamic
Vapor Compensation is
supported.
3. If “Vapor Compensation” is mentioned in the Device Software
Configuration 2 list, the device supports Vapor Compensation.
• In 375 Field Communicator, if Vapor Compensation is supported, it can
be found with the [3, 2, 2, 1] HART sequence
NOTE!
Vapor compensation is supported for Product Level measurement mode only.
Vapor
Compensation