Emerson Rosemount 4600 Reference Manual page 35

Reference Manual
00809-0100-4022, Rev GA
The best location for the transmitter in relation to the process pipe depends on the process
itself. Use the following guidelines to determine transmitter location and placement of
impulse piping:
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3.5.3 Connect wiring and power up
Wiring
To make connections, connect the red lead to the positive terminal of the power supply and
the black lead to the positive terminal of the I/O card on the PLC. Connect the green wire to
panel ground. Keep green ground wire as short as possible to minimize the effects of Radio
Frequency Interference (RFI).
Inductive-based transient protectors with more than 3 mH of inductance can adversely
affect the output of the Rosemount 4600. If your application requires transient protection,
it is recommended that you order a transmitter with the transient protection option
specified.
Installation
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Keep impulse piping as short as possible.
For liquid service, slope the impulse piping at least 1-in. per foot (8 cm per m)
upward from the transmitter toward the process connection.
For gas service, slope the impulse piping at least 1-in 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.
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 200 °F [93.3 °C]) process material out of direct
contact with the transmitter.
Prevent sediment deposits in the impulse piping.
Avoid conditions that might allow process fluid to freeze within the process
connector.
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