dynasonics UFX Operating Instructions Manual - Page 6
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INTRODUCTION AND OPERATING THEORY
Series UFX Phase Shift Flow Meters feature advanced Trans-Phase
measuring technology, providing accurate and reliable flow velocity as-
sessments in closed piping systems. The UFX utilizes a non-invasive
transducer which is hand-held or strapped to the outside of a pipe.
Within seconds, the large 0.7 inch [18mm] LCD provides stable read-
ings in either FPS (Feet per Second) or MPS (Meters per Second).
This product is designed to operate on metal, plastic or rubber pipes
containing liquids with greater than 100 ppm of suspended solids or
entrained gases that act as reflectors.
Phase Shift flow meters utilize two piezoelectric crystals contained
within one transducer to transmit ultrasonic sound energy into the fluid
Figure 1
FLOW
of oscillation will be altered with respect to the transmitted frequency.
The magnitude of frequency change is directly proportional to the ve-
locity of the reflector.
SPECIFICATIONS
Description
Power
Flow Range
Temperature
Enclosure Rating
Accuracy
Transducer Mount
6
stream
sound from reflectors (suspended
solids or entrained gases) within
the liquid. See Figure 1. In ac-
cordance with the theories of
Christian Johann Doppler (circa
1842), if the liquid is moving (and
therefore carrying the reflectors
with it) and oscillating energy is
imposed on the moving reflector,
the reflected energy's frequency
Specification
four AA alkaline cells provide over 30 hours of
operation
0.30 to 30.00 FPS [0.10 to 9.00 MPS]
electronics: -28°F to +140°F [-20°C to +60°C]
transducer: -40°F to +180°F [-40°C to +82°C]
NEMA 12X, splash resistant
±2% full scale
Hand-held (clamp on), utilize acoustic
couplant such as DOW 111
and receive
reflected