Grounding The Transmitter - Emerson Rosemount 702 Reference Manual

Mounting, Wiring Switches, and Sensors:
Models 702DX22 and 702DX61
July 2017
Installing the LCD display
To install the LCD display, use
1. Remove the LCD cover. Do not remove the instrument cover in explosive environments when the
circuit is live.
2. Put the four-pin connector into the LCD display, rotate to the desired position and snap into place.
Note the following LCD temperature limits:
Operating: –4 to 175 °F (–20 to 80 °C)
Storage: –40 to 185 °F (–40 to 85 °C)
3. Replace the transmitter cover.
Note
Only use Rosemount Wireless LCD part number: 00753-9004-0002.
Figure 3-13. Opt
A. LCD pins
B. LCD display
C. LCD cover
3.5

Grounding the transmitter

The Rosemount 702 Transmitter operates with the housing grounded or floating. Floating systems,
however, can cause extra noise that may affect many types of readout devices. If the signal appears noisy
or erratic, grounding at a single point may solve the problem. Grounding of the electronics enclosure
should be done in accordance with local and national installation codes. Grounding is accomplished
through the process connection using the internal or external case grounding terminal.
Determining grounding requirements
Each process installation has different grounding requirements. Use the options recommended by the
facility for the specific switch type, or begin with Option 1, which is the most common.
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Figure 3-13 on page 24
onal LCD D splay
i i
A
and the following instructions:
B C
Mounting, Wiring Switches, and Sensors: Models 702DX22 and 702DX61
Reference Manual
00809-0200-4702, Rev DA