Emerson Rosemount 3051 Reference Manual page 86

Operation and maintenance
August 2019
Procedure
1. Apply pressure.
2. Check the pressure, if the pressure does not match the applied pressure, perform a
3. Check reported analog output against the live analog output. If they do not match,
Trimming with configuration buttons
Local configuration buttons are external buttons located underneath the top tag of the
transmitter. There are two possible sets of local configuration buttons that you can order
and use to perform trim operations: Digital Zero Trim and Local Operator Interface.
To access the buttons, loosen screw and rotate top tag until buttons are visible.
Local Operator Interface (M4): Can perform both digital sensor trim and the 4-20 mA
•
output trim (analog output trim). Follow the same procedures listed in trimming with
Field Communicator or AMS listed below.
• Digital zero trim (DZ): Performs a sensor zero trim. See
frequency
Monitor all configuration changes by a display or by measuring the loop output.
shows the physical differences between the two sets of buttons.
Table 5-1: Local Configuration Button Options
LOI - green retainer
5.4.2 Determine calibration frequency
Calibration frequency can vary greatly depending on the application, performance
requirements, and process conditions. To determine calibration frequency:
Procedure
1. Determine the performance required for your application.
2. Determine the operating conditions.
3. Calculate the Total Probable Error (TPE).
4. Calculate the stability per month.
5. Calculate the calibration frequency.
86
sensor trim.
See Perform a sensor trim.
perform an analog output trim.
See Performing digital-to-analog trim (4-20 mA output
for trim instructions.
trim).
Determine calibration
Digital Zero Trim - grey retainer
Reference Manual
00809-0100-4007
Table 5-1
Rosemount 3051