Rosemount TankRadar Rex DAU 2100, Service Manual

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3-13
Rosemount Tank Radar Rex
Chapter 3 Device Description
Service Manual
308012En, Ed.2
May 2013
3.1.8 Database Registers
Holding Register
The
Holding registers
store various transmitter parameters used to
control the measurement performance.
The database is stored in the non volatile EEPROM memory. It contains
tank constants and data controlling the RTG performance. These data is
used by the Application Software in order to calculate product level and
other values of interest. Since the RTG measures the distance from the
RTG to the product surface, the dimensions of the tank are needed in
order to calculate the actual product level. The information needed to
transform the measured distance into level values is stored in the
database registers.
The database contains other values than tank dimensions as well.
Several registers are used for controlling the RTG gauging process. For
example, there are registers which specify the measurement range, and
registers which determine the lowest amplitude to be considered as a
valid radar echo.
Figure 3-11. Using information from the database the
measured ullage is converted to tank level.
Input
Register
Ullage
Holding
Register
Tank Data
Ullage
Measured
TankMaster