Simulate Digital Signal (Digital Loop Test) - Emerson Rosemount 644 Reference Manual

Reference Manual
00809-0200-4728, Rev RA
Performing a loop test with AMS Device Manager
1.
2.
3.
4.
Performing a loop test with LOI
Reference the figure below to find the path to the Loop Test in the LOI menu.
Figure 2-19. Performing a Loop Test with the LOI
VIEW CONFIG
SENSOR CONFIG
UNITS
RERANGE
LOOP TEST LOOP TEST
DISPLAY
EXTENDED MENU
EXIT MENU
2.11.2

Simulate digital signal (digital loop test)

The simulate digital signal function adds to the analog loop test by confirming the HART output
values are outputting correctly. Digital loop test is only available in HART Revision 7 mode.
Simulate digital signal with a Field Communicator
From the HOME screen, enter the Fast Key sequence.
Device Dashboard Fast Keys
Simulate digital signal with AMS Device Manager
1.
2.
3.
a.
b. Sensor 2 Temperature (only available with option S or D)
4.
Simulate digital signal with LOI
Reference the figure below to find the path to the Simulate Digital Signal in the LOI menu.
Configuration
Right click on the device and select Service Tools.
In the left navigation pane select Simulate.
On the Simulate Tab find the Perform Loop Test button in the Analog Output
Verification group box.
Follow the guided instructions and select Apply when complete.
Right click on the device and select Service Tools.
In the left navigation window select Simulate.
In the group box labeled Device Variables select the variable to simulate.
Sensor 1 Temperature
Follow the screen prompts to simulate selected digital value.
SET 4 MA
SET 20 MA
SET CUSTOM
END LOOP TEST
BACK TO MENU
EXIT MENU
3, 5, 2
Section 2: Configuration
April 2015
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