Teledyne ADFM Analog Output Module, Technical Manual, Page: 27 / 156

Equipment Setup and Installation
a3
a2
a1
R1
R2
R2
R3
Circular or Egged-shaped:
R = Radii in meters
a = Angles in degrees
W3
W2
W1
H3
H2
H1
Rectangular and Trapezoidal shaped:
H = Heights in meters
W = Widths in meters
y
z
x
Figure 2-2. Pipe Geometry and Parameters
During installation, the following parameters need to be recorded, as they
are needed by the software to estimate discharge:
•
Cross-sectional geometry: For rectangular channels, the width
(W) and the height (H) need to be recorded. For circular
pipes/channels the, radii (R) and angles (a) need to be recorded.
These parameters will be entered into software and used to esti-
mate discharge. Note that for a circular channel only the Diame-
ter (D) needs to be recorded.
•
Normal distance from the surface of the transducer fifth beam to
the invert of the pipe: Enter these dimensions into the “Zero Off-
set” box in the WinADFM setup screen.
•
Level of silt in the pipe or channel should be entered into the
“Bed Level” box in the WinADFM setup screen.
2-5.2 Prepare Installation Hardware
Installation hardware is available from MGD Technologies Inc. for a variety
of channel shapes and sizes. Please contact MGD Technologies Inc. for fur-
ther information, or if you desire assistance in applying the ADFM to your
specific situation.
The ADFM transducer assembly includes three drilled and tapped mounting
holes. To avoid damage to the transducer assembly and ceramics, these
holes are the only locations that should be used to mount the transducer as-
sembly to the installation hardware. These mounting holes are drilled and
tapped for a metric size machine screw, size M6-1.0. Inserts are available
to convert the existing holes from metric M6 to metric M3 and US standard
#6-32 size threads.
ADFM Technical Manual (January 2000) page 2-7