Emerson Rosemount 5408, Reference Manual

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Analog signal on alarm
The transmitter automatically and continuously performs self-diagnostic routines. If a
failure or a measurement error is detected, the analog signal will be driven offscale to alert
the user. High or low failure mode is user-configurable.
Table A-4: Signal on Alarm
Standard High Low
Rosemount standard ≥ 21.75 mA (default) ≤ 3.75 mA (option code C8)
NAMUR NE43 ≥ 22.50 mA (option code C4) ≤ 3.6 mA (option code C5)
Analog saturation levels
The transmitter will drive the output to high or low saturation values if measurement goes
outside the 4-20 mA range values.
Table A-5: Saturation Levels
Standard High Low
Rosemount standard (default and option code
C8) 20.8 mA 3.9 mA
NAMUR NE43 (option code C4 and C5) 20.5 mA 3.8 mA
A.2.4 Diagnostics
Alerts
The transmitter is compliant with NAMUR NE 107 Field Diagnostics for standardized
device diagnostic information.
Tools and logging in Rosemount Radar Master Plus
• Echo curve
• Measurement and alert log
Rosemount Radar Master Plus, embedded in Instrument Inspector, enables easy and
powerful troubleshooting with the echo curve tool as well as the measurement and alert
log.
The measurement and alert log holds records of the last seven days of level readings and
echo curve profiles, as well as the 50 last alert events. The logs can be transferred from the
transmitter’s internal memory to a local computer and be presented in a graphical time
line, enabling analysis of historical behaviors.
Smart Diagnostics Suite
Signal Quality
Metrics Diagnostics package that monitors the relations between surface,
noise, and threshold. The function can be used to detect abnormal
conditions in the process such as antenna contamination or sudden loss
Specifications and reference data Reference Manual
February 2020 00809-0100-4408
170 Reference Manual