Service And Troubleshooting Tools - Emerson Rosemount 5408 Reference Manual

Reference Manual
00809-0100-4408
Table 7-7: Troubleshooting the 4-20 mA/HART Output
Symptom
Transmitter will not respond to changes in level.
There is no HART communication (lost device
communication).
7.4

Service and troubleshooting tools

This section briefly describes tools and functions in the Rosemount Radar Master Plus,
AMS Device Manager, and handheld communicator, which may be useful for service and
troubleshooting of the Rosemount 5408 and 5408:SIS Level Transmitters.
7.4.1 Using the echo curve
The Rosemount Radar Master Plus software includes functions for viewing and recording
single instances or movies of the echo curve. The echo curve represents the tank, as seen
by the radar transmitter. Each peak corresponds to a strong reflection of the radar signal.
When connected to Rosemount Radar Master Plus, past measurement records and echo
curves including the 10 highest peaks, as well as the 50 last alert events are automatically
transferred from the transmitter's internal memory to the hard drive on your local
computer. Past measurement records are then available the next time you connect to the
transmitter using the level trend timeline.
Rosemount 5408 and 5408:SIS Level Transmitters
(continued)
Recommended actions
• Verify level is between the 4 and 20 mA set points.
• Verify output is not in alarm condition.
• Verify transmitter is not in loop test or simulation mode.
• Verify power supply voltage is adequate at signal terminals,
see Power supply.
• Check load resistance (250 ohms minimum).
• Check if transmitter is at an alternate HART address.
• Check current analog output value to verify that transmitter
hardware works.
• Verify the blue plug is attached to the TEST terminal (if
applicable). When unplugged, HART communication to
configuration tool may be compromised.
Service and troubleshooting
February 2020
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