FP-4400 PORTABLE CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140
Page 13 onicon.com
3.2.3 Transducer Cables
Included with the FP-4400 are a pair of 12 ft (3.4 m) triaxial cables, one end features a BNC plug, and the other an IP67
plug. The BNC plug will connect to any 10 Series, 20 Series or 30 Series FP-4400 transducer. The IP67 plug connects to the
socket on the top of the FP-4400.
The triaxial cables are marked on both ends as either upstream or downstream. The same markings are found on the label
surrounding the sockets for the IP67 plugs. The purpose of these markings is to assist with connecting the meter to the
transducers in the right orientation. As an example, in the picture below, when flow is from LEFT to RIGHT, the number 1
transducer is upstream, and number 2 is downstream. The reverse is true when flow is from RIGHT to LEFT.
Fifty foot transducer extension cables (ordered separately) are also available for use with the FP-4400. The cables are
provided with BNC connectors for easy connection to the existing 12 ft cables. Use of the extension cables extends the
cable length to a maximum of 62 ft.
Example 2 cross transducer orientation (reflect) on horizontal pipe
3.2.4 Transducers
The FP-4400 can be used with 10 Series, 20 Series and 30 Series transducers. The FP-4400 will be wet calibrated against a
secondary standard for each transducer set ordered with the meter. When switching between transducer type in the
FP-4400 programming menu, the calibration data for each sensor will automatically change, so that the calibration
certificate does not need to be referenced each time.
Each transducer type has a specific nominal pipe size range where they are ideal for use (recommended), and another
range where they will work under favorable conditions (suitable). See the chart below for the specific range.