Dynasonics PFP-600 - Manual (Page 8)

SECTION 4
INSTALLATION
Installation is simple but should be done correctly to assure proper operation. The
transmitter can be mounted in any position. The enclosure is weather-resistant;
however, it should be protected from direct exposure to sun or rain (NEMA 4X). In
order to achieve the best possible results with this flow meter sufficient straight metering
runs of pipe are required. The recommended mounting location for both the velocity
and level sensors is ten (10) straight pipe diameters down stream and five (5) straight
diameters upstream from elbows or fittings. The sensors must be mounted to the
bottom of the pipe. In the case of control valves or other disrupting hardware the
straight diameters should be doubled.
The PFP-600 is designed to determine volumetric flow in partially filled closed horizontal
(<4
°) piping systems. Do not use this meter in open channel or open sewer
applications whereby the transducers may be submerged, or on vertical closed pipes
that may be partially full.
For proper operation in applications for partially filled horizontal pipes, the bottom of the
pipe must be accessible. Select a convenient location for the transmitter, one that will
accommodate the length of transducer cable supplied. Supply 115 VAC+/-10%, and
connect the velocity and level sensors to the appropriate terminals, connect 4-20mA as
needed. Refer to the marked terminals inside the transmitter enclosure terminal
identification. The level detection sensor must be mounted to the bottom-dead-center of
the horizontal pipe to insure proper operation. Diagnostic LED’s on the front of the
enclosure will assist in sensor location. With some level of liquid in the pipe, place two
beads of silicone adhesive on the face of the level transducer. Using the track level
locate the bottom-dead-center of the pipe you are going to be mounting the level sensor
to. With the transducer centerline parallel to the centerline of the pipe contact the
transducer to the pipe, do not apply a lot of pressure to the transducer, it is essential
that the silicone coupling be maintained to assure proper transmission of the ultrasonic
6