Emerson Rosemount 3051P, Reference Manual, Page: 43 / 110

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Reference Manual
00809-0100-4108, Rev CA
Hardware Installation
May 2017
Hardware Installation

Vent all gas from liquid piping legs.

When purging, make the purge connection close to the process taps and purge through equal lengths
of the same size pipe. Avoid purging through the transmitter.

Keep corrosive or hot (above 250 °F [121 °C]) process material out of direct contact with the sensor
module and flanges.

Prevent sediment deposits in the impulse piping.

Avoid conditions that might allow process fluid to freeze within the process flange.
3.4.3 Inline process connection
Inline gage transmitter orientation
The low side pressure port on the inline gage transmitter is located in the neck of the transmitter, behind
the housing. The vent path is 360 degrees around the transmitter between the housing and sensor (See
Figure 3-6 ).
Keep the vent path free of any obstruction, such as paint, dust, and lubrication by mounting the
transmitter so the process can drain away.
Figure 3-6. In-Line Gage Low Side Pressure Port
A. Low side pressure port (atmospheric reference)
Interfering or blocking the atmospheric reference port will cause the transmitter to output erroneous
pressure values.
Do not apply torque directly to the sensor module. Rotation between the sensor module and the
process connection can damage the electronics. To avoid damage, apply torque only to the hex-shaped
process connection.
A. Sensor module
B. Process connection
A
B