Emerson Rosemount 3490 Series Reference Manual page 38

Getting started
January 2021
Note
If the Re-connecting to Digital Transmitter message does not appear, check
the operating mode of the control unit is set to Run App mode and the Input channel
source is set for a digital HART input.
After the start-up process is complete, the display appears showing a measurement e.g.
liquid level or the menu system. The value on the display is the Primary/Process Variable
(PV) of the control unit, but this can be changed.
Whenever power is lost and restored, the control unit re-establishes digital
communications with the HART transmitter and the PV display re-appears.
Related information
Change the operating mode
Programming Channel 1 for a HART input (advanced users)
Programming Channel 2 for a HART input (Rosemount 3492 and advanced users only)
Edit the transmitter bottom reference
When an unconfigured Rosemount 3100 Series Level Transmitter is being used for the first
time, a prompt appears asking for the transmitter bottom reference. This value
automatically sets the 4–20 mA output span of the transmitter.
If commissioning the system now, edit and save a new transmitter bottom reference or
keep (save) the existing transmitter bottom reference.
If the system is not to be commissioned at this time, simply switch off the power and the
same prompt re-appears when switching on the power next time. The Transmitter Bottom
Reference can be changed later, but it is better to get it correct now.
Procedure
1. Press the red (enter) button.
38
Re-connecting to
Digital Transmitter
Please Wait
Bottom Reference =
distance to sensor
from tank bottom
= Continue
Reference Manual
00809-0100-4841
Emerson.com/Rosemount