General Considerations; Mechanical Considerations - Emerson Rosemount 3051 Manual

Rosemount Model 3051 Transmitter with F
GENERAL
CONSIDERATIONS
MECHANICAL
CONSIDERATIONS
2-2
TM
fieldbus Protocol
OUNDATION
Measurement accuracy depends upon proper installation of the
transmitter and impulse piping. Mount the transmitter close to the
process and use a minimum of piping to achieve best accuracy. Keep in
mind the need for easy access, personnel safety, practical field
calibration, and a suitable transmitter environment. Install the
transmitter to minimize vibration, shock, and temperature fluctuation.
IMPORTANT
Install the enclosed pipe plug in unused conduit openings with a
minimum of five threads engaged to comply with explosionproof
requirements. The transmitter is shipped with the plug installed on the
transmitters ordered with CSA explosionproof approval.
Figures 2-1 through 2-5 on pages 2-3 through 2-6 show dimensional
drawings of Model 3051 transmitters. Figure 2-8 on page 2-10 shows
installation examples. Figures 2-9 through 2-12 on pages 2-14 through
2-17 show dimensional drawings of mounting brackets.
NOTE
For Model 3051CD0 and 3051CD1, mount the transmitter solidly to
prevent tilting. A tilt in the physical transmitter may cause a zero shift
in the transmitter output.
NOTE
For steam service, do not blow down impulse piping through the
transmitter. Flush the lines with the blocking valves closed and refill
the lines with water before resuming measurement.
NOTE
When the transmitter is mounted on its side, position the Coplanar
flange to ensure proper venting or draining. Mount the flange as shown
in Figure 2-8 on page 2-10, keeping drain/vent connections on the
bottom for gas service and on the top for liquid service.
NOTE
The Model 3051 transmitter incorporates two independent seals
between the process connection and the conduit connection.