Reference Manual
00809-0100-4801, Rev FA
October 2010
7-33
Rosemount 3051S Series
Figure 7-26. Device Diagnostics
screen
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% 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.
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.
SMART WIRELESS
THUM ADAPTER
CONFIGURATION
Overview
Many older legacy control systems that only use analog can not take full
advantage of HART diagnostics or additional process variables. The Smart
Wireless THUM Adapter can transmit up to four process variables and
additional HART status information at the user configurable update rate. The
selectable process variables are Pressure, Module Temperature, Scaled
Variable, Standard Deviation, Mean, and Coefficient of Variation.
Summary of Contents for Rosemount 3051S Series
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