Emerson Rosemount 3051P Reference Manual page 46

Hardware installation
April 2020
• Keep impulse piping as short as possible.
• For liquid service, slope the impulse piping at least 1 in./ft (8 cm/m) upward from the
transmitter toward the process connection.
• For gas service, slope the impulse piping at least 1 in./ft (8 cm/m) downward from the
transmitter toward the process connection.
• Avoid high points in liquid lines and low points in gas lines.
• Use impulse piping large enough to avoid friction effects and blockage.
• 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 In-line process connection
In-line gage transmitter orientation
CAUTION
Interfering or blocking the atmospheric reference port will cause the transmitter to output
erroneous pressure values.
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
Keep the vent path free of any obstruction, such as paint, dust, and lubrication by
mounting the transmitter so the process can drain away.
46
Figure 3-6).
Reference Manual
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