Rosemount 644

Reference Manual

00809-0400-4728, Rev AA June 2011

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 if the transmitter has a meter connector (transmitter revision 5.5.2 or later). After-market installation requires the meter kit (part number

00644-4430-0001), which includes:

LCD display assembly (includes LCD display, meter spacer, and 2 screws)

Meter cover with O-ring in place

Figure 2-4. Installing the LCD

Display

Captive Mounting Screws and Springs

Meter Spacer

644H

10 pin Connector

LCD Display

Use the following procedure to install the meter.

1.If the transmitter is installed in a loop, secure the loop and disconnect the power. If the transmitter is installed in an enclosure, remove the cover from the enclosure.

2.Decide meter orientation (the meter can be rotated in 90° increments). To change meter orientation, remove the screws located above and below the display screen. Lift the meter off the meter spacer. Remove the 8-pin plug and re-insert it in the location that will result in the desired viewing orientation.

3.Reattach the meter to the meter spacer using the screws. If the meter was rotated 90° from its original position, it will be necessary to remove the screws from their original holes and re-insert them in the adjacent screw’s holes.

4.Line up the 10-pin connector with the 10-pin socket and push the meter into the transmitter until it snaps into place.

5.Attach the meter cover; tighten at least one-third turn after the O-ring contacts the transmitter housing. The cover must be fully engaged to meet explosion-proof requirements.

6.Use a Field Communicator, AMS software, or a FOUNDATION fieldbus Communication tool to configure the meter to the desired display.

NOTE

Observe the following LCD display temperature limits:

Operating: –4 to 185 °F (–20 to 85 °C)

Storage: –50 to 185 °F (–45 to 85 °C)

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Emerson 644 manual LCD Display Installation, Installing the LCD Display