Completing The Av Sensor Installation - Teledyne 4250 Installation And Operation Manual

Figure 3-10 Scissors Ring Adjustment
3.8.3 Completing the AV
Sensor Installation
Scissors Assembly
Base Section Tightening the scissors assembly expands the ring to
press firmly against the pipe wall, securing the ring.
Mounting ring kits are available for different pipe sizes. A kit is
also available for partial pipe applications (consult your Isco
Mounting Rings Installation and Operation Guide). For a listing
of part numbers and ordering information, see Appendix A.
The AV sensor installation is finished by coiling any excess
sensor cable and securing it using cable clamps or other means.
The reference tube inside the cable can be restricted or blocked if
the cable is kinked, sharply bent, or otherwise pinched. The
sensor cable should be handled and mounted with care. Also, if
there is any appreciable distance between the point where the
sensor cable leaves the mounting apparatus and the location of
the flow meter, be sure to attach the cable to the flow stream wall
to prevent it from vibrating, moving around, tangling, or possibly
collecting debris.
Under no circumstances should you leave any extra length of
sensor cable dangling freely in the flow stream where it could
trap debris or become tangled.
Use gloves and eye protection when assembling and installing
the rings in a pipe. Though deburred, the edges of the stain-
less steel can cut if improperly handled. Please read the infor-
mation on how best to install this device.
Observe general safety procedures when entering any man-
hole. See "General Safety Procedures" in the back of the man-
ual for more information on general hazards and necessary
precautions.
4250 Flow Meter
Section 3 Installation
Extensions
CAUTION
3-19