Ground The Transmitter - Emerson Rosemount 648 Reference Manual

Installation

May 2020

3.4.5

LCD display

Transmitters ordered with the optional LCD display will be shipped with the display

installed. The LCD display can be rotated in 90 degree increments by squeezing the two

tabs, pulling out, rotating and snapping back into place. If LCD display pins are

inadvertently removed from the interface board, carefully re-insert the pins before

snapping the LCD display back into place.

Procedure

1. Remove the LCD display cover. Do not remove the instrument covers in explosive

2. Put the 4-pin connector into the LCD display, rotate to the desired position and

3. Replace the transmitter cover.

3.5

The transmitter will operate with the housing either floating or grounded. However, the

extra noise in floating systems affects many types of readout devices. If the signal appears

noisy or erratic, grounding the transmitter at a single point may solve the problem.

The electronics enclosure should be grounded in accordance with local and national

installation codes. This can be accomplished via the process connection, via the internal

case grounding terminal, or via the external grounding terminal.

40

environments when the circuit is live.

snap into place.

The following LCD display temperature limits:

•

Operating:–4 to 175 °F (–20 to 80 °C)

•

Storage:–40 to 185 °F (–40 to 85 °C)

Note

Only use Rosemount Wireless LCD Display part number: 00753-9004-0002.

Figure 3-9: Optional LCD Display

A. LCD display pins

B. LCD display display

C. LCD display cover

A

B

Rosemount 648 Wireless

Reference Manual

00809-0200-4648

C