Emerson Rosemount 8732EM, Reference Manual

Page: 16 / 254

3.2 Location and Position
3.2.1 Environmental considerations
To ensure maximum transmitter life, avoid extreme temperatures and excessive vibration.
Typical problem areas include the following:
• High-vibration lines with integrally mounted transmitters
• Tropical/desert installations in direct sunlight
• Outdoor installations in arctic climates
Remote mounted transmitters may be installed in the control room to protect the
electronics from the harsh environment and to provide easy access for configuration or
service.
3.2.2 Upstream and downstream piping
To ensure specified accuracy over widely varying process conditions, install the sensor with
a minimum of five straight pipe diameters upstream and two pipe diameters downstream
from the electrode plane.
Upstream and downstream straight pipe diameters Figure 3-1:
A. Five pipe diameters (upstream)
B. Two pipe diameters (downstream)
C. Flow direction
Installations with reduced upstream and downstream straight runs are possible. In
reduced straight run installations, the meter may not meet absolute accuracy
specifications. Reported flow rates will still be highly repeatable.
3.2.3 Flow direction
The sensor should be mounted so that the arrow points in the direction of flow.
Sensor Installation
10 Rosemount ® 8732EM Transmitter with HART Protocol Reference Manual