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2.3.2
Status LED
The LED is positioned just below the LCD display. It flashes once per second to indicate
that the control unit and transmitters are operating correctly. The LED is constantly lit if
there are operating difficulties e.g. a transmitter fault.
Related information
2.3.3
Display
After the power-up and self-checks are completed, the Full PV display is presented. The
default Full PV display typically features a digital clock, a measured variable with display
units, and status icons. There are some display differences between control units:
•
On the Rosemount 3491 and 3492, a bar graph indicates the 4–20 mA output signal.
The Rosemount 3493 display can be changed to show the bar graph.
•
On the Rosemount 3492, an extra icon on the first line and indicates if one or two HART
transmitters connected to the control unit.
•
On the Rosemount 3493, there are two totalizers displayed; one above and one below
the control unit PV.
Reference Manual
Control unit overview
00809-0100-4841
January 2021
Emerson.com/Rosemount
13
Summary of Contents for Rosemount 3490 Series
Page 4: ...4 ...
Page 8: ...Introduction Reference Manual January 2021 00809 0100 4841 8 Emerson com Rosemount ...
Page 16: ...Control unit overview Reference Manual January 2021 00809 0100 4841 16 Emerson com Rosemount ...
Page 36: ...Installation Reference Manual January 2021 00809 0100 4841 36 Emerson com Rosemount ...
Page 134: ...Getting started Reference Manual January 2021 00809 0100 4841 134 Emerson com Rosemount ...
Page 184: ...Additional features Reference Manual January 2021 00809 0100 4841 184 Emerson com Rosemount ...
Page 189: ...Reference Manual 00809 0100 4841 January 2021 Emerson com Rosemount 189 ...