Siemens SITRANS FUS1020 Manual page 91

Section 3
Chain Tension
Chain Tension
Screw
Screw
Transducer
Chain Tension
INSTALLATION - REFLECT MOUNT WITH MOUNTING TRACK
2. Place the track rail assembly on the top surface of the pipe 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.
Holding the assembly in place, loop one of the roller chains under the pipe, pull it around and
maintain tension while slipping a link over the tension screw hook. Tighten the tension screw enough
to hold the assembly on the pipe, but still allow rotation. Repeat for the other roller chain. Rotate the
track rail assembly to the intended nine o'clock mounting position on the pipe, then tighten both
tension screws just enough to prevent rotation. Do not overtighten.
3. 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. Loosen and move the assembly away from marked area.
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.
4. Insert the index pin into the reference hole. Select a transducer, apply a thin band of couplant
compound to the transducer's contact surface. Place the transducer between the track rails, slightly
behind the pin and under the clamping screw assembly. Slide it forward until it butts up firmly
against the reference pin.
Upstream
Upstream
Transducer
Flow
Flow
Reference Pin
Reference Pin
Shown Inserted
Shown Inserted
Chain
Tension
Screw
Screw
Track Rail
Track Rail
Assembly
Assembly
Loop Chain
Loop Chain over
tension screw hook
over tension
screw hook
FRONT VIEW
3-36
1020NFM-1D
Transducer
Transducer
Clamping Screw Downstream Clamping Screw
Downstream Xdcr
Transducer
Number Index Pin
Number Index pin
Shown Inserted
Shown inserted
Roller
Roller
Chain
Chain