Mounting Requirements - Emerson Rosemount 3051 Manual

Mounting

Mounting Requirements

The Model 3051C Pressure Transmitter weighs 5.8 lbs (2,6 kg) without
additional options. Optional mounting brackets available with the
Model 3051 allow mounting to a panel, wall, or 2-inch pipe. The B4
Bracket Option for use with the Coplanar flange and the Model 3051T
is 304 SST with 316 SST bolts. Figures 2-9 and 2-10 on pages 2-14 and
2-15 show bracket dimensions and mounting configurations for the
B4 Option.
Bracket options B1, B2, B3, B7, B8, and B9 are sturdy polyurethane
painted carbon steel brackets designed for use in pipe or panel
mounting the traditional flange (H2, H3, H4, or H7 option). The B1–B3
brackets have carbon steel bolts, while the B7–B9 brackets have
stainless steel bolts. Bracket options BA and BC are stainless steel with
stainless steel bolts. Dimensionally, these brackets are identical to the
B1–B3 brackets used with the Rosemount Model 1151 Pressure
Transmitter except for the length of the bolts used to mount the
transmitter to the bracket. When installing the transmitter to one of
the mounting brackets, torque the bolts to 125 inch-pounds.
NOTE
The transmitter is calibrated in an upright position at the factory. If
you mount the transmitter in any other position, the zero point will
shift by an amount equivalent to the liquid head caused by the varied
mounting position. Triming the sensor may be necessary to compensate
for mounting positioning effects. CROSS REF HERE
Refer to Figure 2-8 for examples of the following mounting
configurations:
Liquid Flow Measurement
• Place taps to the side of the line to prevent sediment deposits on
the transmitter's process isolators.
• Mount the transmitter beside or below the taps so gases can vent
into the process line.
• Mount drain/vent valve upward to allow gases to vent.
Gas Flow Measurement
• Place taps in the top or side of the line.
• Mount the transmitter beside or above the taps so liquid will
drain into the process line.
Steam Flow Measurement
• Place taps to the side of the line.
• Mount the transmitter below the taps to ensure that the impulse
piping will stay filled with condensate.
• Fill impulse lines with water to prevent the steam from
contacting the transmitter directly and to ensure accurate
measurement at start-up.
Installation
2-9