Emerson Rosemount 5408 Reference Manual page 124

Service and troubleshooting
February 2020
Use the TEST terminal
Perform an analog loop test using AMS Device Manager and
handheld communicator
During a loop test, the transmitter outputs a fixed value (4 mA, 20 mA, or user-selected
value). The loop test command verifies the output of the transmitter, the integrity of the
loop, and the operations of any recorders or similar devices installed in the loop. A loop
test can also be used to determine the need for an analog output calibration.
Prerequisites
If the transmitter is equipped with a TEST terminal, current can be measured directly at the
terminal block without disconnecting any signal wires.
Procedure
1. Select Service Tools → Simulate.
2. Under Analog Out, select Loop test.
3. Select 4mA, 20mA, or Other, and then select Next (Enter on handheld
4. If Other is selected, enter the desired value, and then select Next (Enter on Field
5. Measure the loop current.
6. To end loop test, select Cancel (ABORT on handheld communicator).
Related information
Calibrate analog out using AMS Device Manager and handheld communicator
Use the TEST terminal
7.4.4 Use the TEST terminal
Prerequisites
WARNING
Verify that the installation is consistent with the appropriate hazardous locations
certifications when the instrument used for loop current measurement is connected.
For Explosion-proof/Flameproof and Non-Incendive/Type n installations, the cover must
not be opened in an explosive atmosphere.
Note
Disconnect the blue plug only during the loop current measurement procedure. To meet
the stated EMC specification during normal operation, the blue plug must be plugged in.
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communicator).
Communicator).
Reference Manual
00809-0100-4408
Reference Manual