Rosemount 3051S Electronic Remote Sensors - Emerson Process ...

Reference Manual
00809-0100-4804, Rev AA
January 2011
Consider Housing
Orientation
Rosemount 3051S ERS System
Impulse Piping
The piping between the process and each ERS sensor must accurately
transfer the pressure to obtain accurate measurements. There are many
possible sources of error: pressure transfer, leaks, friction loss (particularly if
purging is used), trapped gas in a liquid line, liquid in a gas line, and plugged
impulse lines.
The best location for each ERS sensor depends on the process itself. Use the
following guidelines to determine sensor location and placement of impulse
piping:
• Keep impulse piping as short as possible.
• For liquid service, slope the impulse piping at least 1 inch per foot (8
cm per m) upward from the transmitter toward the process connection.
• For gas service, slope the impulse piping at least 1 inch per foot (8 cm
per m) downward from the transmitter toward the process connection.
• Avoid high points in liquid lines and low points in gas lines.
• When purging, make the purge connection close to the process tap and
purge through equal lengths of the same size pipe. Avoid purging
through either 3051S ERS sensor.
• Keep corrosive or hot (above 250 °F or 121 °C) process material out of
direct contact with the sensor module process connection and flanges.
• Prevent sediments from depositing in the impulse piping.
NOTE:
Take necessary steps to prevent process fluid from freezing with the process
flange to avoid damage to the 3051S ERS sensor.
NOTE:
Verify the zero point on each ERS sensor after installation. To reset the zero
point, refer to “Calibration Overview” on page 4-3.
Housing Rotation
The housing can be rotated to improve access to wiring or to better view the
LCD display (if ordered). To rotate the housing, perform the following
procedure:
1. Loosen the housing set screw.
2. Turn the housing up to 180 degrees to the left or right of its original
(as shipped) position.
NOTE:
Do not rotate the housing more than 180 degrees from its original position
without first performing a disassembly procedure (see page 4-8). Over
rotation may sever the electrical connection between the sensor module and
the electronics featureboard.
3. Retighten the housing rotation set screw.
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