Emerson Rosemount 5408 Reference Manual page 224

Configuration parameters
June 2019
User defined variable setup
This section applies only to transmitters ordered with Smart Diagnostics Suite (option
code D01).
Name
Name of the user defined variable. It is recommended to enter a short name to fit into the
LCD display area.
Input register
Enter the number of the input register that contains value of the user defined variable. See
Table C-7
The default value is 20210 (Distance).
Table C-7: 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.
224
for a list of suitable input registers.
Register
20146
20148
21034
21036
21042
21044
22800
Description
Minimum electronics temperature measured by the
device (°C)
Maximum electronics temperature measured by the
device (°C)
Minimum signal quality measured by the device since
last signal quality reset. Signal quality calculation must
be enabled to use this variable.
Maximum signal quality measured by the device since
last signal quality reset. Signal quality calculation must
be enabled to use this variable.
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.
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.
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.
Reference Manual
00809-0300-4408
Reference Manual