Emerson Rosemount 5900C, Reference Manual

Page: 141 / 322

Set the temperature parameter mapping
Rosemount
™
644 temperature transmitters have to be mapped manually in order to
provide input for Vapor Temperature and Average Liquid Temperature calculations.
For Rosemount 2240S Multi-input Temperature Transmitters, temperature readings from
the appropriate elements are automatically mapped to
Vapor Temperature
and
Liquid
Average Temperature .
The following description shows how to configure Rosemount 644 transmitters as
temperature source devices.
Procedure
1. Choose Temperature 1 in the Parameter Mapping list for the first 644 Temperature
Transmitter. In case there are more than one 644 transmitters on the tank, they will
have to be mapped too: for the second and third 644 transmitter, choose
Temperature 2 and Temperature 3 in the Parameter Mapping list.
Note that the actual Vapor Temperature and Liquid Temperature tank parameters
are not mapped. For example, the resulting Vapor Temperature will be calculated
based on the output from Rosemount 644 transmitters located above the current
product surface.
2. In the Source Device Type field, for each temperature parameter (Temperature 1, 2,
3) choose the actual Rosemount 644 transmitter to be used as source device as
illustrated below.
3. In the Source Parameter list, choose Temperature 1 . Note that Temperature 1 is the
source parameter designation for temperature output from a Rosemount 644.
Note
Ensure that temperature element positions are properly configured. This is normally
done in the basic configuration of the Rosemount 5900C level gauge and is
required for proper calculation of Vapor Temperature and Average Liquid
Temperature.
Reference Manual Configuration
00809-0100-5901 September 2019
Rosemount 5900C Radar Level Gauge 141