Emerson Rosemount 3051S MultiVariable Reference Manual page 84

Installation
October 2018
• For liquid service, slope the impulse piping at least 1 in. per ft. (8 cm per m) upward
from the transmitter toward the process connection.
• For gas service, slope the impulse piping at least 1 in. per ft. (8 cm per m) downward
from the transmitter toward the process connection.
• Avoid high points in liquid lines and low points in gas lines.
• Make sure both impulse legs are the same temperature.
• Use impulse piping large enough to avoid friction effects and blockage.
• Vent all gas from liquid piping legs.
• When using a sealing fluid, fill both piping legs to the same level.
• 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 SuperModule process connection and flanges.
• Prevent sediment deposits in the impulse piping.
• Keep the liquid head balanced on both legs of the impulse piping.
Note
Take necessary steps to prevent process fluid from freezing within the process flange to
avoid damage to the transmitter.
Note
Verify transmitter zero point after installation. To reset zero point, refer to .
3.4.6 Connect wiring and power up
It is recommended to use twisted pair wiring. To ensure proper communication, use 24 to
14 AWG wire, and do not exceed 5000 ft. (1500 m).
About this task
Note
Proper electrical installation is necessary to prevent errors due to improper grounding and
electrical noise. Shielded wiring is recommended for environments with high EMI/RFI
levels. Shielded wiring is required in order to comply with NAMUR requirements.
Figure 3-10: Terminal Blocks
Without optional process temperature
connection
84
With optional process temperature connection
Rosemount 3051S Multivariable Transmitter
Reference Manual
00809-0100-4803