Siemens SITRANS FUS1020, Manual, Page: 83 / 251

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1020NFM-1D
Section 3
1. Perform all required menu steps until the flow computer issues the number index and prompts you
to press <ENTER> to finish the transducer install routine. Stop at this point.
Note the number index value displayed in the Pick/Install menu. You will use this number to properly
space the transducers. Check to ensure that you have a matched set of transducers. They both
should have the same S/N number but marked with either an “A” or “B” (e.g., 100A and 100B).
2. On a flat surface, attach the spacer bar to a mounting frame so that the reference hole on the
spacer bar fits over the post on the platform of the frame; tighten the securing screw. Slide the
second mounting frame onto the other end of the spacer bar, align the number index hole with the
post on the platform; then tighten the securing screw. Ensure that the angled sides of both frames
face away from each other. At the mounting location, place the mounting frame/spacer bar assem-
bly on the pipe so that it rests on the top of the pipe. Wrap a mounting strap around the pipe.
Engage the end of the mounting strap with the mounting strap adjusting screw. Slide it under the
spring clip (if so equipped) of one of the mounting frames. Make sure to position it for easy access
to the mounting strap adjusting screw. Do the same to the other mounting frame.
3. Tighten the mounting strap screw enough to take up all of the slack, but not enough to prevent
rotation of the assembly. Rotate the assembly on the pipe to the 9 o’clock position ensuring that it is
a smooth area without any raised spots or seams. Mark a generous area around the mounting
frames (1/2” on either side and half again the length front and back) with a pencil or chalk. Move or
revolve the assembly away from the area marked (loosen straps if necessary to do this).
4. Prepare the two areas you marked by de-greasing the surface, if needed, and removing any grit,
corrosion, rust, loose paint or surface irregularities with the abrasive pipe conditioning material
provided. Clean the pipe of all debris and abrasive particles.
5. Reposition the assembly over the center of the prepared surfaces. Tighten the mounting straps to
seat the assembly firmly on the pipe. Do not overtighten.
Mounting Strap
Transducer Clamping
Screw
Note optional 2nd
Mounting Strap
shown.
Larger pipes may
need an additional
strap for a more
secure mount
Spacer Bar
Spring Clip
(Not present on some
models)
1012 Series
Mounting Frame
Spacer Bar
Platform and
clamping screw
Spring Clip
(Not present on
some
models)
Transducer Clamping
Screw
Spacer Bar
Spacer Bar
Platform and
clamping screw
Mounting Strap
Note operational
2nd Mounting Strap
shown.
Larger pipes may
need an additional
strap for a more
secure mount.
1012 Series
Mounting Frame