Siemens SITRANS F Instruction Manual page 153

Section 3
5. Apply a 1/8-inch continuous bead of couplant compound along the center (the long way) of the
contact surface of the transducer. Position this transducer on the center of the pipe in the middle of
area you have cleaned. The cable connector should be facing away from where the other transducer
will go.
6. While holding the transducer in-place, bring the chain around the pipe and attach the closest cross-
link onto the hook of the EZ clamp. Tighten the adjusting nut until the chain is just snug around the
pipe. Check to ensure that the chain is straight around the pipe and that the transducer is contacting
the pipe at the white dot just under the front label. Ensure also that there is equal space on either side
of the dot between the edges of the transducer and the pipe. Adjust if necessary. Tighten the chain but
do not overtighten. Ensure the transducer did not move while tightening.
7. Attach the second transducer to the spacer bar at the index hole specified in paragraph #1. Note that
in some cases, the transducers may have two sets of holes for securing the spacer bar. When using
the EZ clamp assembly, use the lower set of holes when attaching the spacer bar.
8. Unlike the first transducer, do not apply any couplant at this point. Attach the spacer bar (with the
second transducer attached to it) to the mounted transducer by inserting an index screw through the
REF hole in the bar and into the lowest hole on the transducer. Tighten. Visually ensure that the spacer
bar is axially aligned with the pipe. While holding in this position, pencil a line (or a fine line with chalk)
along the back edge of the transducer and a dot below where the white dot is below the front label
(see "A" below). Disassemble the spacer bar and second transducer from the mounted transducer
and remove the transducer from the bar. Use the bar as a straight edge and, with one edge against
the mounted transducer's white dot and the other crossing the dot you drew, draw a line crossing the
dot (see "B" below). Set the bar aside.
A
Transducer
Transducer
Spacer Bar
Spacer Bar
B
Transducer
C
9. Wrap the mylar spacing guide around the pipe so that the left edge is against the transducer edge
mark (refer to "C" on previous page). Arrange so that one end overlaps the other by at least three
inches. Trim to fit if necessary, but be sure not to trim at the overlapping end in order to
keep it square.
Pipe
Pipe
Spacer Bar
Spacer Bar
3-7
Dot
Transducer
Dot Transducer
Dot
Dot
Line Line
Mylar
Mylar
Spacing
Spacing
Guide
Guide
1010ENFM-3B
Transducer
Edge Line