Rectangular And Trapezoidal Channels; Mounting Rings For Circular Channels; Spring Rings - Teledyne 4250 Installation And Operation Manual

4250 Flow Meter
Section 3 Installation
3.7 Rectangular and
Trapezoidal Channels
Figure 3-8 Isco Rectangular Mounting Plate
3.8 Mounting Rings for
Circular Channels

3.8.1 Spring Rings

3-16
A flat, anchored mounting plate is a common mounting choice for
installing sensors in rectangular or trapezoidal channels. See the
Isco Mounting Rings Installation and Operation Guide for more
information.
Consult your Isco Mounting Rings Installation and Oper-
ation Guide for detailed hardware information.
The following sections describe sensor installation using the two
options available for mounting the Sensor in pipes or round-bot-
tomed flow streams. For pipes up to 15" (38.1 cm) in diameter,
stainless steel self-expanding mounting rings (Spring
Rings) are available. For pipes larger than 15" in diameter,
Teledyne Isco offers the Scissor Rings (Universal Mounting
Rings). Area velocity sensors can also be installed using primary
measuring devices.
To install a spring ring, you compress the ring, slip it inside the
pipe, and then allow it to spring out to contact the inside
diameter of the pipe. The inherent outward spring force of the
ring firmly secures it in place. A typical self-expanding mounting
ring (with a probe mounted on it) is shown in Figure 3-9.
These mounting rings are available for use in pipes with inside
diameters of 6" (15.2 cm), 8" (20.3 cm), 10" (25.4 cm), 12" (30.5
cm), and 15" (38.1 cm). The Teledyne Isco part numbers for the
various size mounting rings available are listed in Appendix B.
These part numbers include not only the ring, but also the mis-
cellaneous hardware necessary to mount the sensor on the ring.
Always wear leather gloves when handling the rings (either
type). The metal is finished, but there is still a possibility of cut-
ting your hands on the edges.
CAUTION