Ground/Wiring Fault Detection - Emerson Rosemount 8782 Reference Manual

Reference Manual
00809-0100-8782
9.5.1 Turning electronics temperature on/off
LOI menu path
The electronics temperature diagnostic can be turned on or off as required by the
application.The electronics temperature diagnostic will be turned on by default.
9.5.2 Electronics temperature parameters
The electronics temperature diagnostic has one read-only parameter. It does not have any
configurable parameters.
LOI menu path
This parameter shows the current temperature of the electronics. This is a read-only value.
9.6

Ground/wiring fault detection

The transmitter continuously monitors signal amplitudes over a wide range of frequencies.
For the ground/wiring fault detection diagnostic, the transmitter specifically looks at the
signal amplitude at frequencies of 50 Hz and 60 Hz which are the common AC cycle
frequencies found throughout the world. If the amplitude of the signal at either of these
frequencies exceeds 5 mV, that is an indication that there is a ground or wiring issue and
that stray electrical signals are getting into the transmitter. The diagnostic alert will
activate indicating that the ground and wiring of the installation should be carefully
reviewed.
The ground/wiring fault detection diagnostic provides a means of verifying installations
are done correctly. If the installation is not wired or grounded properly, this diagnostic will
activate and deliver an alert. This diagnostic can also detect if the grounding is lost over-
time due to corrosion or another root cause.
9.6.1 Turning ground/wiring fault on/off
LOI menu path
The ground/wiring fault detection diagnostic can be turned on or off as required by the
application.
9.6.2 Ground/wiring fault parameters
The ground/wiring fault detection diagnostic has one read-only parameter. It does not
have any configurable parameters.
Reference Manual
Advanced Diagnostics Configuration
Diagnostics → Diag Controls → Elect Temp
Diagnostics → Variables → Elect Temp
Diagnostics → Diag Controls → Ground/Wiring
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