Dynasonics UFX ULTRASONIC FLOW METER - Manual (Page 10)

10
Figure 3
Apply an even layer of grease,
approximately ⅛" (3 mm) thick to the
flat surface of the transducer. Place
the transducer on the prepared area
of the pipe, with the cable pointing
downstream. See Figure 3. Align the
transducer with the pipe, ensuring
that it is parallel with the pipe wall.
Apply only enough pressure to hold
the transducer in place. If no reading
is shown, perform a “rub test” by
rubbing thumb across the dry
transducer head. The zeros should
display a low flow reading. See
Troubleshooting Guide for further
recommendations.
F. OBTAINING A READING
Press the ON/OFF key on the keypad. On power up, the UFX performs
internal diagnostics and starts the ultrasonic transmitter. The display will
read Hold for approximately 5 seconds during this time. If the
transducer is properly mounted to a pipe containing flowing liquid with
at least 100 ppm of 100 micron or larger particles or entrained gases,
the display will begin to indicate velocity. The default units of measure
are FPS (feet per second). The response time of the UFX is
approximately 10 seconds
to obtain a reading.
Adequate signal strength
is obtained when the OK
icon appears in the upper
right corner of the display.
See Figure 4. Readings
taken without this icon
p r e s e n t m a y b e
erroneous. It is recommended that survey readings of at least 30
seconds be taken to ensure reading stability.
The UFX can be turned off by pressing the ON/OFF key on the keypad,
or the unit will automatically turn off after approximately 3 minutes of
operation.
G. CHANGING UNITS OF MEASURE
Toggle between FPS (feet per second) and MPS (meters per second)
by depressing the FT/SEC M/SEC key on the keypad.
Figure 4
Figure 3
FLOW
Transducer Cable