Analog Output (Hart) - Emerson Rosemount 5402 Reference Manual

Reference Manual
00809-0100-4026, Rev KC
5.3.5

Analog output (HART)

For the analog output, the output source (primary value), range values, and alarm mode are specified.
Figure 5-7. Standard Range Value Settings
B
C
D
A.
B.
C.
D.
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. The 20 mA point
should be set below the Transition Zone, since the measurement accuracy is reduced in this region. For
information on the Transition Zone, see
If a measured value goes beyond the measurement range, the transmitter enters saturation mode (if
limit alarm is disabled) or alarm mode, depending on the current configuration.
Alarm mode
Choose the desired Alarm mode to specify the analog output state when there is a failure or a
measurement error.
High: The output current is set to the High Alarm Limit.
Low: The output current is set to the Low Alarm Limit.
Freeze Current: The output current is set to the last valid value at the time when the error occurs.
Configuration
A
Upper reference point
Transition zone
Product level
Lower reference point (Level=0)
E
F
G
E. 20 mA Upper Range Value (URV)
F. Range 0-100%
G. 4 mA Lower Range Value (LRV)
"Performance specifications" on page
Configuration
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