Emerson Rosemount 5408 Reference Manual page 267

Reference Manual
00809-0100-4408
Table C-5: List of Input Registers to the User Defined Variable
Variable
Min Electronics
Temperature
Max Electronics
Temperature
Min Signal Quality
Max Signal Quality
Distance to Upper Surface
Distance to Lower Surface
Surface Signal/Noise Ratio 21054
Product Dielectric
Constant
Unit
Units of measurement of the user defined variable.
More advanced options
More advanced options are only available in Rosemount Radar Master Plus.
By default, these parameters are automatically set based on current configuration. It is
recommended that these parameters should remain at the default settings, unless there is
a good understanding of the function and capability of the parameters.
Empty tank handling
The Empty Tank Handling functions handle situations when the surface echo is close to the
tank bottom.
Rosemount 5408 and 5408:SIS Level Transmitters
Register Description
20146 Minimum electronics temperature measured by the
device (°C)
20148 Maximum electronics temperature measured by the
device (°C)
21034 Minimum signal quality measured by the device since
last signal quality reset. Signal quality calculation must
be enabled to use this variable.
21036 Maximum signal quality measured by the device since
last signal quality reset. Signal quality calculation must
be enabled to use this variable.
21042 Distance to the upper product surface (m) when
measuring on multiple products in the tanks. Double
Surface function must be enabled to use this variable.
21044 Distance to the lower product surface (m) when
measuring on multiple products in the tanks. Double
Surface function must be enabled to use this variable.
Ratio between surface echo signal strength and signal
noise (dB). A high value (>20 dB) indicates very good
margin to noise.
22800 Square root of the product dielectric constant
estimated by the transmitter when the Bottom
Projection function is enabled.
The product dielectric constant is calculated when both
the bottom and surface echoes are found by device,
and when surface echo is within the Max Projection
Distance. Product dielectric constant estimation is
frozen if any of these conditions are not fulfilled.
Configuration parameters
February 2020
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