Rosemount 3051S Series, Справочное руководство

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30
Reference Manual
00809-0100-4803, Rev GA
Configuration
September 2017
Configuration
Alarm level verification
The transmitter alarm level should be verified before returning the transmitter to service if alarm and
saturation levels are changed.
This feature is also useful in testing the reaction of the control system to a transmitter in an alarm state.
To verify the transmitter alarm values, perform a loop test and set the transmitter output to the alarm
value (see
Table 2-4 , Table 2-5 , and Table 2-6 on page 28 , and “Analog output loop test” on page 96 ).
Variable saturation behavior
The analog output of the Rosemount 3051SMV may respond differently based on which measurement
goes outside the sensor limits. This response will also depend on the device configuration.
Table 2-7 lists
the behaviors of the analog output under different conditions.
Table 2-7. Variable Saturation Behavior
Primary variable Action Analog output behavior
Flow or Energy Flow
Differential Pressure goes outside
the sensor limits
Analog output goes to high or low saturation
Flow or Energy Flow
Absolute Pressure or Gage Pressure
goes outside the sensor limits
Analog output does not saturate
Flow or Energy Flow
Process Temperature goes outside
the user defined sensor limits
Temperature mode is Normal:
Analog output goes into high or low alarm.
Temperature Mode is Backup:
The Process Temp will go into backup mode and
be fixed at the user defined value. Analog
output will not saturate or go into alarm.
DP
Differential Pressure goes outside
the sensor limits
Analog output goes to high or low saturation
AP or GP
Absolute Pressure or Gage Pressure
goes outside the sensor limits
Analog output goes to high or low saturation
Process Temp
Process Temperature goes outside
the user defined sensor limits
Direct process variable output:
Analog output goes to high or low saturation
Mass and Energy Flow:
Analog output goes to high or low alarm