
FP-4400 PORTABLE CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140
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3.1.2 One (1) (Direct) Cross Mode
One (1) cross mount provides a shorter sonic path. The shorter path typically improves performance with difficult pipe
conditions, such as older and/ or corroded piping. One (1) cross (Direct) mounting requires half the distance between
transducers when compared to the two (2) cross (Reflect) mode and may be the only option if the availability of the
mounting space is limited.
3.1.1 Two (2) (Reflect) or Four (4) (Double Reflect) Cross Mode
Two (2) cross (Reflect) mode is the recommended operating mode whenever possible. It is the simplest way to mount the
transducers. Operating in the reflect mode also minimizes the effects of some flow distortions.
3.1 OVERVIEW (CONTINUED)
2 or 4 Cross Separation Distance (Reflect)
Transducer
1 Cross Separation Distance (Direct)
Separation Distance
Transducer
2 CROSS SEPARATION DISTANCE
(REFLECT)
4 Cross Separation Distance (Double Reflect)
Transducer
Separation Distance
Transducer
4 CROSS SEPARATION DISTANCE
(
DOUBLE REFLECT
)
1 Cross Separation Distance (Direct)
Separation Distance
Transducer
Transducer
1 CROSS SEPARATION DISTANCE
(
DIRECT
)
Four (4) cross (Double Reflect) mode is used for some installations in small pipe sizes using the 10 Series transducers.