Emerson Rosemount 3051 Manual page 16

Rosemount Model 3051 Transmitter with F
Figure 2-8. Installation Examples
GAS OR LIQUID SERVICE
Flow
2-10
TM
fieldbus Protocol
OUNDATION
NOTE
In steam or other elevated temperature services, it is important that
temperatures at the coplanar process flanges not exceed 250 °F
(121 °C) for transmitters with silicone fill or 185 °F (85 °C) for inert fill.
In vacuum service, these temperature limits are reduced to 220 °F
(104 °C) for silicone fill and 160 °F (71 °C) for inert fill. Models 3051L,
and the traditional flange allow higher temperatures.
GAS SERVICE
Flow
Impulse Piping
The piping between the process and the transmitter must accurately
transfer the pressure to obtain accurate measurements. There are five
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 density variations between the legs.
STEAM SERVICE
Flow