Emerson Process Management ROSEMOUNT 5300 - Manual (Page 81)

Reference Manual
00809-0100-4530, Rev BA
July 2009
5-9
Rosemount 5300 Series
Analog Output (HART) The Output Source (Primary Value), Range Values and Alarm Mode are
specified for the analog output.
Figure 5-5. Example of Range
Value settings
Output Source/Primary Variable
Specify the source to control the analog output. Typically, the Primary Value is
configured to be the Product Level.
Upper/Lower Range Value
Enter the range values that correspond to the analog output values
4 and 20 mA. It is recommended that the 4 mA and 20 mA values are set
outside the Transition Zones. See “Transition Zones” on page 2-10 for more
information.
If a measured value goes beyond the measurement range, the transmitter
enters saturation mode (limit alarm is disabled) or alarm mode depending on
the current configuration.
Also make sure that the 20 mA value is below the Upper Null Zone (UNZ).
(This parameter may be used if there are measurement problems in the upper
part of the tank, see “Handling of Disturbances from Nozzle” on page C-4).
The UNZ is equal to zero in the default configuration.
20 mA Upper Range Value (URV) = 100%
Upper Transition Zone
Product Level
Lower Transition Zone
4 mA Lower Range Value
(LRV) = 0%
Upper Reference Point
Ran
g
e 0-
100%
Lower Reference Point (Level=0)