Dynasonics PFP-600 - Manual (Page 9)

signal. At this time the diagnostic LED’s should be observed at the transmitter. A red
“fault”LED indicated that the transducer must be repositioned on the pipe. By moving
the sensor + or - the original position toward the top of the pipe a green “read” LED
should be achieved.
NOTE: For applications that may be turbulent in nature, the green “read” LED, and red “fault” LED may
blink intermittently. Under these conditions, position the level transducer such that the green LED is on
more than the red LED. At this point the Transducer clamp can be used to hold the transducer in place,
again, do not over tighten the clamp such that the couplant may be lost.
The Velocity sensor is mounted in much the same manner as the level sensor. the
velocity sensor should also be mounted at the bottom-dead-center of the pipe. The
non-connector ends of the two transducers should be butted up to each other. For
those applications where this type of orientation is not possible, the two sensors should
be mounted as close to one another as possible to avoid system degradation. Apply
two beads of silicone adhesive to the face of the velocity sensor. Install the sensor in
the mounting track. Using minimal pressure, contact the sensor to the pipe and secure
with the Transducer clamp. It should be noted that the velocity sensor is less position
sensitive than the level transducer and alignment by eye is typically sufficient. Set
meter to read FPS (UNITS=0), meter should indicate flow, and indicate both sufficient
particulate or bubble content in the liquid being measured as well as proper transducer
placement.
Upon flowing liquid the display will indicate GPM (Standard) or other engineering units
as specified and the totalizer will begin to accumulate flow data over time. The
diagnostic LED’s should be observed after 24 hrs. of operation (the curing time for the
transducer couplant to insure proper adhesion had occurred). If the diagnostic LED’s
indicate a level or velocity sensing failure, determine if pipe has liquid in it and/or the
liquid is flowing. If the level status indicates a red “fault” light the level sensor may need
to be remounted. Likewise should the micro-processor display show OFPS, the velocity
sensor may need to be remounted. Should these steps not solve the indicated
difficulties contact the factory for further direction.
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