Emerson Rosemount 644 with HART Protocol User Manual

70
Reference Manual
00809-0200-4728, Rev SA
Troubleshooting
July 2018
Troubleshooting
Figure 5-4. Measurement Dynamics of Temperature Transmitter
5.5.2 Analog output trim
The analog output trim allows the transmitter’s conversion of the input signal to a 4–20 mA output to be
altered (
Figure 5-4). Adjust the analog output signal at regular intervals to maintain measurement
precision. To perform a digital-to-analog trim, perform the following procedure with Traditional Fast Key
sequence:
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.
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.
LOI
Reference Figure 5-5 for guidance on where to find analog trim in the LOI menu.
Figure 5-5. Trimming the Analog Output with the LOI
Device Dashboard Fast Keys
3, 4, 5, 1
Microprocessor
Digital-to-Analog
Signal Conversion
Analog-to-Digital Signal
Conversion
Transmitter electronics module
Analog
Input
Analog
Output
Field
Communicator
HART
Output
Sensor and Ohm/mV
Trim adjust the signal here
Output and Scaled Output
Trim adjust the signal here
CALIBRATCALIBRAT
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
....

Emerson Rosemount 644 with HART Protocol Specifications

General

Brand	Emerson
Model	Rosemount 644 with HART Protocol
Category	Transmitter
Language	English