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Reference Manual
00809-0100-4631, Rev BA
April 2007
Rosemount 1154 Series H
2-2
Figure 2-1. Qualified Life vs.
Ambient Temperature.
MECHANICAL
CONSIDERATIONS
This section contains information you should consider when preparing to
mount the transmitter. Read this section carefully before proceeding to the
mechanical installation procedure.
Mount the Rosemount 1154 Series H transmitter to a rigid support (i.e., one
with a fundamental mechanical resonant frequency of 40 Hz or greater). A
mounting bracket included with the transmitter facilitates panel mounting.
Figure 2-4 on page 2-7 shows the qualified mounting configurations. The
transmitter was seismic tested and qualified with the bracket mounted with
four
3
/
8
in. diameter bolts. Orientation with respect to gravity is not critical to
qualification. However, if the transmitter is mounted with the flanges in a
horizontal position, zero the transmitter to cancel the liquid head effect caused
by the difference in height of the process connections.
If the transmitter is mounted to a non rigid panel, ensure that seismic input to
the mounting bracket does not exceed qualification levels given in Rosemount
Report D8700096.
Process Connections
Process tubing installation must prevent any added mechanical stress on the
transmitter under seismic disturbances. This may be done by using
stress-relief loops in the process tubing or by separately supporting the
process tubing near the transmitter.
The process connections to the transmitter flanges were qualified with
3
/
8
in.
tubing using Swagelok
®
compression fittings. For options using
1
/
4
–18 NPT
connections, the user assumes responsibility for qualifying the interface.
Transmitters with Flange Options A or H are shipped with Swagelok fittings for
process connections. Included are front ferrule, rear ferrule, and nut. Ensure
the fittings are placed on the tubing with the orientation and relative position
shown in Detail A in Figure 2-5 on page 2-8.
Electronics
Qualified Life
Ambient Temperature (°F)
Time (Y
ear
s
)
Module
Qualified Life
1154-0293A
Содержание Rosemount 1154DH
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