Emerson Rosemount 644 Reference Manual page 70

Hardware Installation
March 2021
3.4.5 LCD display installation
The LCD display provides local indication of the transmitter output and abbreviated
diagnostic messages governing transmitter operation. Transmitters ordered with the LCD
display are shipped with the meter installed. After-market installation of the meter can be
performed. After-market installation requires the meter kit, which includes:
• LCD display assembly (includes LCD display, meter spacer, and two screws)
• Meter cover with O-ring in place
Figure 3-7: Display Connection
C
A. Rosemount 644 Transmitter
B. Mounting screw and springs
C. LCD display
D. LCD rotation screws
Procedure
1. If the transmitter is installed in a loop, secure the loop and disconnect the power. If
2. Decide meter orientation (the meter can be rotated in 90-degree increments). To
3. Reattach the meter to the meter spacer using the screws. If the meter was rotated
4. Line up the connector with the pin socket and push the meter into the transmitter
5. Attach the meter cover. The cover must be fully engaged to meet explosion-proof
6. Use a Field Communicator, AMS Device Manager software tool to configure the
70
Transmitter
D
the transmitter is installed in an enclosure, remove the cover from the enclosure.
change meter orientation, remove the screws located above and below the display
screen. Lift the meter off the meter spacer. Rotate the display top and re-insert it in
the location that will result in the desired viewing orientation.
90 degrees from its original position, it will be necessary to remove the screws from
their original holes and re-insert them in the adjacent screws holes.
until it snaps into place.
requirements.
meter to the desired display.
A
C
B
A. Rosemount 644 Field Mount
B. LCD rotation screws
C. LCD display
Reference Manual
00809-0200-4728
Field mount transmitter
B
Emerson.com/Rosemount
A