Onicon F-4300 Original operating instructions

ON I CON
Flow and Energy Measurement
F-4300
Clamp-on Ultrasonic Flow Meter
Installation & Operation Guide

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 2 onicon.com
SAFETY INFORMATION
To ensure correct use of the system, please read this manual thoroughly.
Regarding this manual:
• This manual should be passed on to the end user.
• Before use, read this manual thoroughly to comprehend its contents.
• The contents of this manual may be changed without prior notice.
• All rights reserved. No part of this manual may be reproduced in any form without ONICON Incorporated’s written
permission.
• ONICON Incorporated makes no warranty of any kind with regard to this material, including, but not limited to,
implied warranties of merchantability and suitability for a particular purpose.
• All reasonable eort has been made to ensure the accuracy of the contents of this manual. However, if any errors are
found, please inform ONICON Incorporated.
• ONICON Incorporated assumes no responsibilities for this product except as stated in the warranty.
• If the customer or any third party is harmed by the use of this product, ONICON Incorporated assumes no
responsibility for any such harm owing to any defects in the product which were not predictable, or for any indirect
damages.
SAFETY PRECAUTIONS:
The following general safety precautions must be observed during all phases of installation, operation, service, and repair
of this product. Failure to comply with these precautions or with specic WARNINGS given elsewhere in this manual
violates safety standards of design, manufacture, and intended use of the product. ONICON Incorporated assumes no
liability for the customer’s failure to comply with these requirements. If this product is used in a manner not specied in
this manual, the protection provided by this product may be impaired.
The following messages are used in this manual:
WARNING
Messages identied as “WARNING” contain information regarding the personal safety of
individuals involved in the installation, operation or service of this product.
CAUTION
Messages identied as “CAUTION” contain information regarding potential damage to the
product or other ancillary products.
IMPORTANT NOTE
Messages identied as “IMPORTANT NOTE” contain information critical to the proper operation
of the product.

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 3 onicon.com
TABLE OF CONTENTS
SECTION 1.0 GENERAL INFORMATION ............................................................................................. 5
1.1 PRINCIPLE OF OPERATION ..........................................................................................................................................5
1.2 TYPICAL F-4300 FLOW METER.....................................................................................................................................5
1.3 STANDARD FEATURES AND SPECIFICATIONS .........................................................................................................6
1.4 MODEL NUMBERING CODIFICATION ........................................................................................................................7
1.5 MAINTENANCE ..............................................................................................................................................................7
1.6 ADDITIONAL HARDWARE THAT MAY BE REQUIRED .............................................................................................7
1.7 WORKING ENVIRONMENT ..........................................................................................................................................7
1.8 SERIAL NUMBER ............................................................................................................................................................7
SECTION 2.0 UNPACKING .................................................................................................................... 8
2.1 CHECKING THAT YOU HAVE RECEIVED EVERYTHING ............................................................................................8
SECTION 3.0 INSTALLATION................................................................................................................ 9
3.1 OVERVIEW.......................................................................................................................................................................9
3.1.1 One (1) Cross Mode (Direct) ...........................................................................................................................................................10
3.1.2 Two (2) or Four (4) Cross Mode (Reect, Double Reect) ...................................................................................................10
3.2 SITE SELECTION............................................................................................................................................................11
3.2.1 The Wall-Mount Enclosure ..............................................................................................................................................................11
3.2.2 The Transducers ...................................................................................................................................................................................12
3.3 MECHANICAL INSTALLATION ...................................................................................................................................13
3.3.1 Preparing the Pipe ..............................................................................................................................................................................14
3.3.2 two (2) or four (4) Cross Mode (Reect) Mounting Using Brackets and Spacer Bar.................................................15
3.3.3 one (1) Cross Mode (Direct) Mounting Using Brackets and Spacer Bar........................................................................16
3.3.4 Installing Transducers In Bracket and Spacer Bar Hardware ..............................................................................................19
3.4 CONNECTING THE TRANSDUCER SIGNAL CABLES...............................................................................................21
3.5 ELECTRICAL INSTALLATION.......................................................................................................................................22
3.5.1 Input Power Requirements ..............................................................................................................................................................22
3.5.2 Power and Output Signal Wiring Details ...................................................................................................................................23
3.5.3 Transducer and Sensor Wiring Details ........................................................................................................................................23
SECTION 4.0 START-UP....................................................................................................................... 25
4.1 NAVIGATING THE RUN MODE & PROGRAMMING PAGES ..................................................................................25
4.2 RUN MODE & PROGRAMMING PAGE LAYOUT......................................................................................................26
4.3 RUN MODE ICONS .......................................................................................................................................................27
4.4 RUN MODE PAGES .......................................................................................................................................................28
4.5 PROGRAMMING MENU PAGES .................................................................................................................................30

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 4 onicon.com
SECTION 5.0 BACNET MS/TP............................................................................................................. 37
5.1 BACNET OBJECT TYPES ..............................................................................................................................................38
5.2 PROTOCOL IMPLEMENTATION STATEMENT ..........................................................................................................35
5.3 DEVICE OBJECT.............................................................................................................................................................39
5.4 ANALOG INPUT(S).......................................................................................................................................................40
5.5 ANALOG VALUE(S).......................................................................................................................................................41
5.6 BINARY VALUE(S).........................................................................................................................................................42
5.7 MULTI-STATE VALUE....................................................................................................................................................43
SECTION 6.0: MODBUS....................................................................................................................... 44
6.1 MODBUS MEMORY MAP ............................................................................................................................................45
6.2 REPORT SLAVE ID FUNCTION CODE .......................................................................................................................46
SECTION 7.0 COMMISSIONING CLAMP-ON ULTRASONIC FLOW METERS.............................. 47
7.1 HELPFUL HINTS FOR START-UP AND COMMISSIONING ....................................................................................47
7.2 COMMISSIONING PROCEDURE ................................................................................................................................47
7.3 COMMISSIONING WORKSHEET ...............................................................................................................................48
SECTION 8.0: TROUBLESHOOTING................................................................................................... 49
APPENDIX A -SPEED OF SOUND IN WATER TABLE...................................................................... 50
APPENDIX B -PIPE CHARTS.............................................................................................................. 51

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 5 onicon.com
SECTION 1.0 GENERAL INFORMATION
ONICON Incorporated would like to thank you for purchasing our quality F-4300 Clamp-on Ultrasonic Flow Meter.
As our valued customer, our commitment to you is to provide fast reliable service, while continuing to oer quality
products to meet your growing ow measurement needs.
1.1 PRINCIPLE OF OPERATION
The ONICON F-4300 Clamp-on Ultrasonic Flow Meter utilizes the dierential transit time method to measure the
velocity of relatively clean liquids in full pipes. By measuring the dierence between transit times of ultrasonic sound
waves travelling between two transducers, the ow velocity and direction are accurately determined.
1.2 TYPICAL F-4300 FLOW METER
The F-4300 Ultrasonic Flow Meter utilizes clamp-on signal transducers that mounted on the outside wall of the pipe.
It is suitable for measuring the volumetric ow of liquids in a wide variety of applications including bi-directional ow
applications. The meter is housed in a polycarbonate wall-mounted enclosure with a built-in user interface/display.
F-4300
Transit Time
Ultrasonic Flow Meter
13
5
FLOW
4
2
1. Traxial transducer cables. The maximum allowable cable length is 100 ft.
2. Conduit-ready ttings. Refer to section 3.3 for conduit hole locations and dimensions
3. Mounting hardware, includes: mounting brackets, mounting strap kit, and spacer bar. Refer to section 2.1 for more
installation hardware options.
4. Vertical pipes: installation of ow meter in vertical pipe runs with upward or downward ow is acceptable, provided the
system is pressurized (closed loop)
5. Horizontal pipes: install transducers at 2 or 10 o'clock position

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 6 onicon.com
1.3 STANDARD FEATURES AND SPECIFICATIONS*
F-4300 TRANSMITTER
PERFORMANCE ACCURACY ±1.0% of reading from 1 to 20 ft/s
±0.01 ft/s for velocities below 1 ft/s
REPEATABILITY ±0.25%
OVERALL FLOW RANGE 0.1 to 20 ft/s
OPERATING CONDITIONS OPERATING
TEMPERATURE
-40°F to 250°F
STORAGE
TEMPERATURE
-5°F to 140°F
INPUT POWER AVAILABLE OPTIONS • 24 V AC/DC, 50/60 Hz, 10 VA max
• 110-240 VAC, 50/60 Hz, 10 VA max
I/O SIGNAL One (1) isolated analog output, 4-20 mA or 0-5 VDC
Two (2) pulse ouputs
ELECTRONICS ENCLOSURE NEMA 4X (IP 66) polycarbonate with clear shatter-proof face
DISPLAY White, backlit, 128 x 64 dot matrix
AMBIENT CONDITIONS -5°F to 140°F
PROGRAMMING Menu driven via ve (5) programming keys
ELECTRICAL CONNECTIONS Enclosed terminal blocks, cable access through four (4) conduit openings
NETWORK CONNECTIONS AVAILABLE OPTIONS • RS485 serial interface, BACnet® MS/TP or MODBUS® RTU
• MODBUS® TCP/IP (24 VDC only)
NETWORK CONFIGURATION &
ADDRESSING
Baud Rate 9600, 19200, 38400 or 76800
Device Address Range 1 - 247
Device Instance Range 0 - 4,194,302 (BACnet MS/TP only)
Parity None, Even or Odd (MODBUS® RTU only)
APPROVALS CE 2014/30/EU EMC Directive
CSA EN61010
F-4300 FLOW SENSOR
PERFORMANCE SENSING METHOD Non-wetted, pipe mounted transducers
OPERATING Ultrasonic dierential transit time velocity measurement
OPERATING CONDITIONS FLUID TEMPERATURE -40°F to 250°F
FLOW SENSOR DESIGN TRANSDUCER** 316 Stainless Steel and Ultem
TRANSDUCER CABLE Triaxial with BNC connectors and seal jackets
PIPE SIZE RANGE 2” to 24”
PROCESS CONNECTIONS MOUNTING
HARDWARE
Stainless steel pipe clamps and alignment bar
* SPECIFICATIONS subject to change without notice.
**See model codication for additional information regarding option selections.

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 7 onicon.com
1.5 MAINTENANCE
Periodically inspect the power cables, transducer cables, cable glands and the enclosure for signs of damage. Inspect
transducer installation and mounting hardware for loose connections or diminished ultrasonic couplant.
1.4 MODEL NUMBERING CODIFICATION
METER MODEL NUMBER CODING = F-4300-ABCD-EEFF
1.6 ADDITIONAL HARDWARE THAT MAY BE REQUIRED
Flex conduit may be required to connect transducer mounting bracket to rigid conduit. Do not connect transducers
mounting brackets to rigid conduit.
1.7 WORKING ENVIRONMENT
The F-4300 was designed for installation and use in typical commercial/industrial environments. The following
considerations must be observed in selecting a location for the meter:
• The ambient operating temperature range is -5°F (-20°C) to 140°F (60°C).
• Do not expose the meter to corrosive liquids or fumes.
• Avoid installation locations that are close to strong sources of electrical interference.
• Avoid installing the electronics enclosure in direct sunlight.
• Avoid installation locations where the transducers will be exposed to vibrations in the piping system.
• Always run transducer cables in dedicated conduit separate from signal and power cables.
• Do not run signal cables for the meter in conduit with mains (AC) power cables.
1.8 SERIAL NUMBER
The serial number of your F-4300 is located outside and inside the enclosure. Transducers will be packaged inside the
enclosure they were calibrated with and will bear their own unique serial numbers. You should have one of these serial
numbers available when contacting ONICON for assistance regarding your meter.
A = Electronics Enclosure
1 = NEMA 4X Polycarbonate
B = Input Power
1 = 24 VAC/DC
2 = 110-240 VAC
C = Serial Communications
1 = RS485, BACnet or MODBUS
(Field selectable. Default = BACnet)
*2 = MODBUS TCP/IP
D = Transducer Cable Length
1 = 25 feet (Default)
2 = 50 feet
3 = 100 feet
EE = Transducer Series
**2X = 20 series transducer, for 2 to 24” nominal pipe diameter.
FF = Installation Hardware
21 = 2 to 6” nominal pipe diameter, stainless steel
mounting bracket
22 = 8 to 24” nominal pipe diameter, stainless steel
mounting bracket
*Requires 24 VDC Power Supply
**Actual transducer selected, 21 through 24, is factory selected at time of order.

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 8 onicon.com
SECTION 2.0 UNPACKING
The F-4300 is generally shipped in one package. Notify the freight carrier and ONICON if any items are damaged in
transit.
2.1 CHECKING THAT YOU HAVE RECEIVED EVERYTHING
Documentation
Enclosed with each F-4300 is a comprehensive documentation package that includes the following items:
• One (1) F-4300 Clamp-on Ultrasonic Flow Meter Installation and Operation Guide
• One (1) Flow Meter Certicate of Calibration
• One (1) Site Installation Details Document
Please notify ONICON if any of these items are missing.
The Wall Mount Enclosure
Remove the F-4300 enclosure from the shipping carton and inspect it inside and out for physical damage. Please notify
ONICON immediately if you discover any damage.
Inspect the transducers for signs of damage. Each transducer will have a label attached with a serial number associated
with it that can be found on the F-4300 enclosure.
Transducer Cables
Transducer cables are coiled and included inside the shipping carton. One end of each cable is already terminated with a
BNC connector for connection to the transducers. The other end is pre-terminated for connection to the electronics. An
easily removable strain-relief tting is also included.
Installation Hardware Includes:
• Two (2) mounting brackets
• One (1) Site Installation Detail which include the transducer spacing unique to the application
• One (1) alignment / space bar
• One (1) tube of coupling compound
• One (1) mounting kit that includes:
◦Pipe straps
◦Mylar sleeve
◦Duct tape
◦ Level
◦ Black Sharpie
◦ Sanding block
IMPORTANT NOTE
The ONICON F-4300 Clamp-on Ultrasonic Flow Meter is a custom calibrated system. Unless specically noted in
writing by ONICON, ALL COMPONENTS (electronics enclosure and ultrasonic transducers) share associated serial
numbers, and must be installed together as a system. Mixing components from dierent systems will result in
signicant errors in measurement.

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 9 onicon.com
SECTION 3.0 INSTALLATION
3.1 OVERVIEW
Each F-4300 Ultrasonic Flow Meter is provided with a pair of matched ultrasonic transducers. The transducers are mounted
(clamped) on to the outside wall of the pipe. Triaxial cables convey the transducer signals to the wall mount enclosure
containing the signal processing circuitry and the user interface display.
Ultrasonic transducers can be congured to operate in either 1 (Direct), 2 (Reect) or 4 (Double Reect) cross operating
modes. The choice of operating mode is dictated by the conguration settings programmed into the meter. For new
installations, conguration data is programmed into the meter prior to shipment. Programming data determines the
transducer operating mode and the spacing between the transducers.
1
2
PIPE
3
4
1. Transducer
2. Spacer bar
3. Adjustable stainless steel pipe clamp
4. Transducer mounting bracket

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 10 onicon.com
2 or 4 Cross Separation Distance
Transducer
1 Cross Separation Distance
Separation Distance
Transducer
Separation Distance
Transducer
Transducer
2 or 4 Cross Separation Distance
Transducer
1 Cross Separation Distance
Separation Distance
Transducer
Separation Distance
Transducer
Transducer
3.1.1 One (1) Cross Mode (Direct)
One (1) cross mount provides a shorter sonic beam path. This usually improves performance with sonically attentive
liquids or pipe materials. Direct mounting only requires half the distance between transducers when compared to the
reect mode and may be the only option if the availability of mounting space is limited.
3.1.2 Two (2) or Four (4) Cross Mode (Reect, Double Reect)
Two (2) or four (4) cross mount is the recommended operating mode whenever possible. It is the simplest way to mount
the transducers. Operating in the reect mode also minimizes the eects of some ow distortions.
*Shown in "Setup" menu after sensor, uid and pipe parameters are entered. See pg. 31 for more information.
3.1 OVERVIEW (Continued)

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 11 onicon.com
3.2 SITE SELECTION
When selecting a site for mounting the system components, consider the criteria under Section 1.6 WORKING
ENVIRONMENT, as well as the following:
3.2.1 The Wall-Mount Enclosure
Find an easily accessible location where wire connections can be made and meter readings can be taken from oor level.
Mount the enclosure on a vibration-free surface. Avoid sites such as the plenum of a fan coil, heat exchanger, or other
housings containing motors. Avoid mounting the enclosure in close proximity to VFD’s, electric motors or other strong
sources of electrical interference.
IMPORTANT NOTE
The maximum allowable distance between the wall-mount enclosure and the transducers installed on the pipe is
100 feet. Only ONICON furnished cable may be used between wall-mount enclosure and the transducers.

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 12 onicon.com
3.2.2 The Transducers
For best results, the transducers must be installed on a straight run of pipe free of bends, tees, valves, transitions, insertion
probes and obstructions of any kind. For most installations, ten straight unobstructed pipe diameters upstream and
ve diameters downstream of the transducers is the minimum recommended distance for proper operation. Additional
considerations are outlined below.
• Avoid installing the transducers downstream from a throttling valve, a mixing tank, the discharge of a positive
displacement pump, or any other equipment that could possibly aerate the liquid. The best location will be as free as
possible from ow disturbances, vibration, sources of heat, noise, or radiated energy.
• Avoid mounting the transducers on a section of pipe with any external scale. Remove all scale, rust, loose paint, etc.,
from the location prior to mounting the transducers.
• Do not mount the transducers on a surface aberration (pipe seam, etc.).
• Do not mount transducers from dierent ultrasonic ow meters on the same pipe.
• Do not run the transducer triaxial cables in common bundles with cables from other instrumentation. You can run these
cables through a common conduit ONLY if they originate at the same ow meter.
• Never mount transducers under water.
• Avoid mounting transducers on the top of a horizontal pipe. The best placement on a horizontal pipe is either the 10:00
or 2:00 position for 4 or 2 cross mode (Reect), or one sensor at 9:00 and one sensor at 3:00 for 1 cross mode (Direct).
• Do not mount transducers on the bottom of a horizontal pipe.
• Mounting on a vertical pipe is recommended only if ow is in the upward direction. When mounting on a vertical pipe
owing in a downward direction, make sure there is sucient back pressure in the system to maintain a full pipe.
IMPORTANT NOTE
In some cases, longer straight runs may be necessary where the transducers are placed downstream from devices
which cause unusual ow prole disruptions or swirl (for example, modulating valves, two elbows in close
proximity and out of plane, etc.)
Flow
5 Dia.
10 Dia.

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 13 onicon.com
3.3 MECHANICAL INSTALLATION
CAUTION
Do not drill additional holes in this enclosure. Doing so may damage the electronic circuitry contained within and
will void all warranties.
CONDUIT HOLE
AND DIMENSIONS
ENCLOSURE
MOUNTING
HOLES
END VIEW
COVER
MOUNTING SCREWS
INCLUDED WITH
METER
2.74”
2.10”
1.34”
D = 1”
3X D = 0.875”
ENCLOSURE
DIMENSIONS
MOUNTING HOLE
DIMENSIONS
2.00”
3.75”
5.60”
Transit Time
Ultrasonic Flow Meter
F-4300
11.00”
7.50”
ON I CON
Flow and Energy Measurement
Transit Time
Ultrasonic Flow Meter
F-4300
10.00”
6.46”
ON I CON
Flow and Energy Measurement

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 14 onicon.com
3.3.1 Preparing the Pipe
Once a suitable section of straight pipe has been located, the pipe surface must be prepared. Refer to the Site Installation
Details document provided with the installation hardware to determine the transducer spacing dimensions.
Prepare the pipe surface as shown below. Clean and de-grease two rectangles where the transducers will be located. Use
the sanding block provided to remove any grit, corrosion, rust, loose paint or other contaminants. The cleaned surface
should extend at least ½” beyond the length and width of the transducers.
Always install hardware at the 10:00 or 2:00 position on horizontal pipes. This prevents the ow meter from being aect by
air trapped at the top of the pipe.
Refer to site installation details
document for transducer spacing
Prepare mounting
locations for transducers
For horizontal pipes, locate transducers
at the 10:00 or 2:00 position
Air at the top of the
pipe will disrupt the
signal
Solids at the bottom
of the pipe will
disrupt the signal
BAD GOOD

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 15 onicon.com
4. Move the hardware assembly to its nal position on the pipe. Align the brackets with the prepared surface for each
transducer, ensuring that the entire assembly is properly oriented along the axis of the pipe. Tighten the assembly
rmly on the pipe. Do not over tighten the straps.
3. Install the mounting straps as shown. For larger pipes, use multiple straps connected end-to-end to increase the
length of each strap. Leave enough slack in the straps to allow the assembly to be correctly positioned on the pipe.
The location of the routing hole allows for the straps to mount outside of the pipe insulation, if the pipe is insulated.
Wrap the rst mounting strap around the pipe and through the holes of the side of the mounting bracket. Make sure
to position it so there is easy access to the adjustment screw. Repeat this procedure for the second mounting bracket.
Adjustment Screw
Routing Holes
3.3.2 Two (2) or Four (4) Cross Mode (Reect) Mounting Using Brackets And Spacer Bar
1. Prepare the pipe surface as described in section 3.3.1.
2. On a at surface, assemble the hardware as shown in the drawing below.
Orient mounting brackets as shown
Reference Position Refer to the Site Installation Details document provided with the
installation hardware to determine the correct separation distance
Space bar shows distance
between transducers
Separation
Distance
5. Proceed to Section 3.3.4 Installing Transducers In Bracket and Spare Bar Hardware
2 or 4 Cross Separation Distance
Transducer
1 Cross Separation Distance
Separation Distance
Transducer
Separation Distance
Transducer
Transducer

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 16 onicon.com
3.3.3 One (1) Cross Mode (Direct) Mounting Using Brackets and Spacer Bar
1. Once the installation site selection process described in section 3.2 is complete, prepare the pipe as described in 3.3.1
2. Attach the spacer bar to one of the mounting brackets at the reference mark on the ruler.
3. Position the mounting bracket and spacer bar in the center of the cleaned area and secure it in place with a mounting
strap. Make sure the mounting strap tightening screw is facing up. While tightening the strap, check to ensure that the
bracket remains centered on the pipe.
The bracket is centered on the pipe when the bottom edges of both stainless side plates on the bracket are in full
contact with the pipe surface. For horizontal pipe positions, hold the level up to the top of the bracket to ensure the
angle is correct.
END VIEW
Pipe
Transducer
Mounting Bracket
Transducer
Mounting Bracket
2" pipe minimum
IMPORTANT NOTE
One (1) cross mode mounting requires that transducers be installed on opposite sides of the pipe. For horizontal
pipes, the transducers should be located at the 3 o’clock and 9 o’clock positions.
IMPORTANT NOTE
Mount the mounting bracket as illustrated on pipes 2" / 50 mm od or larger. Stainless steel bands are included for
mounting on pipes up to 30" / 750 mm od.

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 17 onicon.com
50%50%
1.5869
Place mark at center
of bracket roller
Draw line along edge
of bracket
5. Use level to ensure that this bracket is lined up on the center of the pipe. While holding the bracket centered on
the pipe, place a mark at the center of the bottom of the bracket as shown below. Next, mark along the edge of the
bracket as indicated in the drawing below.
6. Remove the bracket from the spacer bar and then remove the spacer bar from the remaining bracket that is strapped
to the pipe. Using the spacer bar as a straight edge, draw a line down the center of the pipe intersecting the mark
made at the center of the tapered roller and the line drawn against the edge of the bracket as shown below.
50%50%
1.5869
Draw line using spacer bar as edge
Spacer bar
Orient mounting brackets as shown
Reference Position Refer to the Site Installation Details document provided with the
installation hardware to determine the correct separation distance
Space bar shows distance
between transducers
Separation
Distance
4. Attach the second bracket to the spacer bar at the separation distance specied on the Site Installation Details
document provided with the installation hardware.
7. Wrap the mylar sleeve around the pipe so that the left edge is against the transducer edge mark. Arrange so that one
end overlaps the other. Ensure that it is snug around the pipe and mark along the overlapping edge.
50%50%
1.5869
Spacing guide
Draw the guide tightly
around the pipe and mark
at the overlapping edge
3.3.3 One (1) Cross Mode (Direct) Mounting Using Brackets and Spacer Bar (Continued)

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 18 onicon.com
10. Ensure that the bracket is sitting on a smooth area without any raised spots (seams, etc.). Mark a generous rectangle
around the bracket with a pencil, marker or chalk. Remove the bracket and the spacing guide.
11. Clean and de-grease the area within the rectangle. Use the small sanding block provided with the installation
hardware as necessary to remove any grit, corrosion, rust, loose paint or other contaminants. The cleaned surface
should extend at least ½” beyond the length and width of the mounting bracket.
12. Replace the spacing guide back in the same position it was in and re-tape it to the pipe.
13. Position the bracket as before against the edge of the guide with the center of the bracket centered on the half way
mark drawn on the guide. Secure it in place with a mounting strap. Make sure the mounting strap tightening screw is
facing toward the bracket so you can hold it in place while tightening the screw. While tightening the strap, check to
ensure that the bracket remains centered on the pipe.
The bracket is centered on the pipe when the bottom edges of both stainless steel side plates on the bracket are in
full contact with the pipe surface. For horizontal pipe positions, hold the level up to the top of the bracket to ensure
the angle is correct.
8. Remove the mylar and lay it out on a at surface. Either measure the exact distance half-way between the overlap
edge and the mark at the overlap, or fold the guide from the overlap edge to overlap mark and draw a line at the fold
or halfway point.
9. Reinstall the mylar; its edge abutting the bracket edge mark on the pipe and the overlapping edge in line with the line
drawn down the center of the pipe. Tape it in this position on the pipe. Take the second bracket and place it against
the edge of the guide with it centered on the half way mark drawn on the guide.
14. Proceed to Section 3.3.4 Installing Transducers In Bracket and Spare Bar Hardware.
3.3.3 One (1) Cross Mode (Direct) Mounting Using Brackets and Spacer Bar (Continued)
2 or 4 Cross Separation Distance
Transducer
1 Cross Separation Distance
Separation Distance
Transducer
Separation Distance
Transducer
Transducer
50%
50%
1.5869
Overlap edge mark
Opposite side of pipe

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 19 onicon.com
3.3.4 Installing Transducers In Bracket and Spacer Bar Hardware
1. Apply the coupling to the transducer as show below. A packet of acoustic coupling compound was supplied with the
transducers. Contact ONICON if you need more compound.
Apply a continuous lengthwise ¼” wide bead of coupling
compound down the center of the transducer
2. Slide the transducer into the mounting bracket. Do not allow the bottom of the transducer to make contact with the
pipe until it butts against the mounting bracket. The clamping bracket can be retracted such that the transducer can
be directly over the correct position before making contact with the pipe. Push down rmly on the transducer to mate
with pipe.
When installing the transducer, do not allow
the bottom face to touch the pipe surface
until it is fully inserted to the bracket
Too little grease
Transducer
face should be
perpendicular to pipe
surface. Ensure transducers
are parallel with pipe
axis and ush to the
pipe surface

F-4300 CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 20 onicon.com
4. Connect transducer cable female BNC to transducer male BNC. Slide the protective rubber boot over the transducer’s
BNC connector. In environments where condensation may occur (chilled water systems), apply a generous amount of
acoustic coupling compound dielectric grease inside the boot before sliding it over the BNC connector.
5. Repeat procedure for the second transducer.
3. Tighten the transducer clamping screw to hold the transducer rmly in place. Do not over tighten the screw. If you
are not routing exible conduit all the way to the mounting bracket, you can remove the conduit adapters to make
installation easier.
Transducer Clamping Screw
Conduit Adapter
3.3.4 Installing Transducers In Bracket and Spacer Bar Hardware (Continued)