Device Diagnostics; Overview; Ma Output Diagnostic; Transmitter Power Consumption - Emerson Rosemount 3051S Series Reference Manual

Reference Manual
00809-0100-4801, Rev HA
7.9

Device Diagnostics

7.9.1

Overview

In addition to standard device diagnostics that provide notification of when the transmitter fails, the
Rosemount 3051S Pressure Transmitter with Advanced HART Diagnostics has predictive device
diagnostics that detect issues in the electronics that may result in on-scale failure.
Figure 7-26. Device Diagnostics Screen
7.9.2

mA Output Diagnostic

The mA Output Diagnostic measures the actual 4–20 mA output from the transmitter's
Digital-to-Analog converter and compares it against the output by the transmitter's microprocessor. If
the measured value deviates from the expected value by 2 percent or more, the diagnostic will generate
an alarm or alert.
Note
The default trip action for mA Output Diagnostic is set to Alarm. For use in SIS, the trip action must not
be changed or the proper safety coverage stated on the FMEDA will not be realized.
7.9.3

Transmitter Power Consumption

Transmitter Power Consumption diagnostic monitors for excessive current draw by the transmitter. This
diagnostic is used to detect a potential on-scale failure due to current leakage or failing electronics.
Note
If trip action is set to Alarm, the transmitter will drive the 4–20 mA output to fail HIGH regardless of the
alarm direction configured by the alarm switch.
Advanced HART Diagnostic Suite
Advanced HART Diagnostic Suite
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