Emerson Rosemount 644, Reference Manual

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73
Reference Manual
00809-0200-4728, Rev RA
Section 5: Operation and Maintenance
April 2015
Operation and Maintenance
From the HOME screen, enter the Fast Key sequence.
Performing an analog output trim using AMS Device Manager
1. Right click on the device and select Service Tools .
2. In the left navigation pane select Maintenance .
3. Find the Analog Calibration tab and click on the Analog Trim button.
4. Follow the screen prompts through the Analog Trimming process.
Performing an analog output trim using LOI
Reference the below image for guidance on where to find Analog Trim in the LOI menu.
Figure 5-5. Trimming the Analog Output with the LOI
5.5.3 Performing a scaled output trim
The Scaled Output Trim matches the 4 and 20mA points to a user-selectable reference scale
other than 4 and 20 mA (2–10 volts, for example). To perform a scaled D/A trim, connect an
accurate reference meter to the transmitter and trim the output signal to scale as outlined in the
“Trim the analog output” procedure.
Performing an analog output trim using a Field Communicator
1. Connect an accurate reference meter to the transmitter at the CONNECT REFERENCE
METER prompt by shunting the power to the transmitter through the reference meter
at some point in the loop.
From the HOME screen, enter the Fast Key sequence.
Device Dashboard Fast Keys
3, 4, 5, 1
Device Dashboard Fast Keys
3, 4, 5, 2
CALIBRAT CALIBRAT
DAMPING
VARIABLE MAP
TAG
ALM SAT VALUES
PASSWORD
....
VIEW CONFIG
SENSOR CONFIG
UNITS
RERANGE
LOOP TEST
DISPLAY
EXTENDED MENU EXTENDED MENU
EXIT MENU
SENSOR 1 CALIB
SENSOR 2 CALIB*
ANALOG TRIM ANALOG TRIM
FACTORY RECALL
BACK TO MENU
EXIT MENU
....