Siemens SITRANS FUH1010PVDX Operating Instructions Manual page 80

Section 3
1011 Series
Transducer
INSTALLATION - REFLECT MOUNT WITH TRANSDUCERS AND SPACING BAR
1. Perform all required menu steps until the flow computer issues the number index and prompts you to
press <ENT> 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 index 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. Assemble the transducers to the spacer bar, with the cable connectors facing away from each other
as shown above. The spacer bar is attached to a transducer using a transducer index screw. One
transducer is attached using the "REF" hole on the spacer bar. The second transducer is attached to
the spacer at the index hole specified in Step 1.
3. Temporarily position the assembly (in the 9 o'clock position) at the location where you have deter-
mined it would be mounted. Ensure that it is a smooth area without any raised spots or seams. Mark
a generous area around the transducers (1/2-inch on either side and half again the length front and
back) with a pencil or chalk. Remove the assembly.
4. Prepare the two areas you marked by de-greasing the surface, if needed, and removing any grit, cor-
rosion, rust, loose paint or surface irregularities with the abrasive pipe conditioning material provided.
Clean the pipe of all debris and abrasive particles.
5. Remove transducer from the spacer bar that was attached through the REF hole. Put a mounting strap
around the pipe and engage an end into the adjusting screw (adjusting screw should be pointing up).
Apply a 1/8-inch continuous bead of couplant compound down the center (the long way) of the
contact surface of one of the transducers (see paragraph 3.3.5 Recommended Sonic Coupling Com-
pounds). Place the transducer on the pipe center in the middle of one of the areas you have cleaned
with its cable connector pointing away from the other cleaned area. Holding the transducer in place,
slide the mounting strap over it (and under the clip if there is one) and tighten with a screwdriver.
While tightening, check to ensure that the white dot under the front label is centered on the pipe and
that there is equal space on both edges. Also, Make sure to position strap for easy access to the
mounting strap adjusting screw.
6. Repeat Step 5 with the second transducer leaving it still attached to the spacer bar. Apply a 1/8-inch
bead of couplant to the transducer. At the same time you place it in the middle of the second area
prepared, secure the spacing bar to the already mounted transducer by inserting the transducer
index screw through the REF hole on the Bar.
Spacer Bar
Spacer Bar Reference
Index Securing Screw
3-10
CQO:1010PVXFM-3
Spring Clip
Spacer Bar
Number Index
Securing
Screw
Mounting
Strap