Dynasonics TFXP Operating Manual

Series TFXP

Series TFXP

Series TFXPSeries TFXP

Transit Time Ultras oni c Fl ow Me t er

Operations & Maintenance

Manual

REV 4/01

BEFORE OPERATING THE TFXP

Important Notice!

Figure 1.1

The TFXP flow meter is equipped with a Lead Acid Gel
Cell battery. This battery will require cha rging before ini­tial operation.

Apply power, utilizing the enclosed 12 Volt DC output line
power converter or cigarette-style power cord, to the
TFXP for a period of 16-24 hours prior to using the prod­uct for the first time. The power converter connects to the
socket connection located on the side of the enclosure.
See Figure 1.1. A fully charged battery will provide up to
24 hours of contin uous op eration befo re rechargin g will b e
necessary.

When the b atte ry le vel ha s de crea sed to a po int where re ­charging is required, th e LOW BATTERY ind icator will illu­minate on the front panel. A t that po int, the me ter will onl y
operate a short time more until it automatically turns itself
off—preventing excessive battery discharge that can dam­age the Gel Cell battery. The TFXP has an integral charg­ing circuit that prevents overcharging. The instrument can
be permanently connected to AC line power without dam­aging the flow meter or the battery. Page 1.10 of this
manual contains additional recommendations to preserve
and maximize the power in the TFXP battery.

If the TFXP is to be used for extended periods of opera­tion, the AC power converter or the 12 volt cigarette con­verter can remain connected indefinitely.

Rev. 4/01 -1.1- TFXP

TABLE OF CONTENTS

Part 1 - Introduction

Part 1 - Connections

Part 1 - Inputs and
Outputs

Quick-Start Operating Instructions 1.4-1.5

Introduction
General 1.6
Applications 1.6
Model Matrix 1.7

Product Specifications 1.8

Transmitter Connections
Transmitter Limits and Connections 1.9-1.10
Battery Charging and Maintenance 1.10-1.12

Input/Output Connections and Options
4-20 mA Output 1.13
Datalogger 1.14

Pages

optional Dual Control Relay 1.14
optional Rate Pulse Output 1.15
optional RS232C 1.15
optional RS485 1.15
optional RTD-BTU 1.15

Part 2 - Transducer
Installation

Rev. 4/01 -1.2- TFXP

Transducer Mounting
Mounting Location 2.1-2.2
Transducer Mounting Method 2.3-2.5
Transducer Spacing - Keypad Entry 2.6-2.13
Transducer Spacing - UltraLink 2.13-2.14
Pipe Preparation 2.15
Transducer Mounting 2.15-2.21

TABLE OF CONTENTS

Part 3 - Operation

Part 4 - Software

Programming Entries
Instrument Startup 3.1
Keypad Operation 3.2-3.3
Graphics Display Configuration 3.3
Menu Structure 3.3-3.4
Keypad Entry Detail 3.4-3.25

BASIC MENU 3.4-3.13
DATALOG OPERATION 3.14-3.16
OUT2 MENU 4-20 mA 3.17-3.19
Optional Input/Output 3.20-3.24
SECURITY MENU 3.25
SERVICE MENU 3.26-3.27

Signal Strength 3.26
Setting ZERO Flow 3.27

DISPLAY MENU 3.28-3.29

Software Utility Operation
UltraLink 4.1-4.9
DataLink 4.10-4.12

Appendix
Keypad Interface Map
Fluid Characteristic Table
TFX Error Codes
Modbus Protocol
Pipe Dimension Chart: Cast Iron
Pipe Dimension Chart: ST, SS, PVC
Velocity to Volumetric Conversion
RTD-BTU Option
Statement of Warranty
Customer Service

Pages

Rev. 4/01 -1.3- TFXP

QUICK-START OPERATING INSTRUCTIONS

This manual contains detailed operating instructions for all
aspects of the TFXP instrument. The following condensed
instructions are provided to assist the operator in getting
the instrument configured and measuring as quickly as
possible. This pertains to basic operation only. If specific
instrument features are to be used or if the installer is un­familiar with this type of instrument, refer to the app ropri­ate section in the manual for complete details.

Transducer Location

1. TRANSDUCER LOCATION

A. In general, select a mounting location on the piping

system with a minimum of 10 pipe diameters (10
times the pipe inside diameter) of straight pipe up­stream and 5 straight diameters downsteam. See
Table 2.1 for detailed piping configurations and rec­ommended lengths of straight pipe.

B. Select a mounting method for the transducers

based on pipe size and liquid characteristics. See
Figure 1.2. Select W-Mount for plastic pipes flow­ing clean, non-aerated liquids in the 1-3 inch [25-75
mm] internal diameter range. Select V-Mount for
pipes of all materials and most liquids in pipe sizes
from 1-10 inches [25-250 mm]. Select Z-Mount for
pipes larger than 10 inches.

W-Mount V-Mount

Figure 1.2

C. Enter the following data into the TFXP transmitter

via the integral keypad or UltraLink software utility.

Rev. 4/01 -1.4- TFXP

Z-Mount

QUICK-START OPERATING INSTRUCTIONS

*Nominal values for these
parameters are included
within the TFXP operating
system. The nominal values
may be used as they appear
or may be modified if exact
system values are known.

Figure 1.3

1. Transducer mounting method

2. Pipe O.D. (Outside Diameter)

3. Pipe wall thicknes s

4. Pipe material

5. Pipe sound speed*

6. Pipe relative roughness*

7. Pipe liner thickness

8. Pipe liner material

(if present)

(if present)

9. Fluid type

10. Fluid sound speed*

11. Fluid viscosity*

12. Fluid specific gravity*

D. Record the value calculated and displayed as

Transducer Spacing/XDCR SPC.

2. PIPE PREPARATION AND TRANSDUCER MOUNT­ING

A. The piping surface, where the transducers are to be

mounted, needs to be clean and dry. Remove
loose scale, rust and paint to ensure satisfactory
acoustical bonds.

B. Attach the transducer mounting rail or saddles to

the pipe at the location(s) determined in Step 1.
Refer to Figure 1.1 for proper orientation.

C. Apply a liberal amount of couplant grease onto the

transducer faces. Place each transducer into the
rail/saddle ensuring proper linear and radial place­ment.

Connections

3. TRANSDUCER/POWER CONNECTIONS

A. Do not attempt to add additional cable to the trans-

ducers.

B. Refer to the WIRING DIAGRAM located on the in-

ner door of the TFXP transmitter and Figure 1.3 for
proper power and transducer connections.

Startup

4. INITIAL SETTINGS AND POWER UP

A. Press the ON button on the flow meter keypad.
B. From the Service Menu, verify that signal strength

is greater than 2.0%.
C. Input proper units of measure and I/O data.

Rev. 4/01 -1.5- TFXP

PART 1 - INTRODUCTION

General

Application
Versatility

The TFXP ultrasonic flow meter is designed to measure
the fluid velocity of liquid within closed conduit (pipe). The
transducers are a non-contacting, clamp-on type, which
will provide benefits of non-fouling operation and ease of
installation.

TFXP transit time flow me­ters utilize two transducers
that function as both ultra­sonic transmitters and re­ceivers. The transducers
are clamped on the out­side of a closed pipe at a
specific distance from
each other. The transducers can be mounted in V-mode
where the sound transverses the pipe two times, W-mode
where the sound transverses the pipe four times, or in Z­mode where the transducers are mounted on opposite
sides of the pipe and the sound crosses the pipe once.
This selection is based on pipe and liquid characteristics.
The flowmeter operates by alternately transmitting and re­ceiving a frequency modulated burst of sound energy be­tween the two transducers and measuring the time interval
that it takes for sound to travel between the two transduc­ers. The difference in the time interval measured is di­rectly related to the velocity of the liquid in the pipe.

The TFXP flow meter can be successfully applied on a
wide range of metering applications. The simple to pro­gram transmitter allows the standard product to be used
on pipe sizes ranging from 1 - 100 inch [ 25 - 2540 mm ]
internal diameters. A variety of liquid applications can be
accommodated: ultrapure liquids, potable water, chemi­cals, raw sewage, reclaimed water, cooling water, river
water, plant effluent, etc. Because the transducers are
non-contacting and have no moving parts, the flow meter
is not affected by system pressure, fouling or wear. Stan­dard transducers are rated to 300°F [150°C]. Higher tem­peratures can be accommodated. Please consult the Dy­nasonics factory for assistance.

Rev. 4/01 -1.6- TFXP

PART 1 - INTRODUCTION

User Safety

Data Integrity

Product
Identification

Product Matrix

The TFXP employs modular construction and provides
electrical safety for the operator. The display face con­tains voltages no greater than 10 Vdc. All user connec­tions are made through sealed bulk-head plugs located
on the side of the TFXP enclosure.

Non-volatile flash memory retains all user-entered con­figuration values in memory for several years, even if
power is lost or the unit is turned off. Data Logger values
are stored in flash memory in the logger. Password pro­tection is provided as part of the Security menu and pre­vents inadvertent configuration changes or totalizer re­sets.

The serial number and complete model number of your
TFXP is located on the inside of the transmitter’s front
cover. Should technical assistance be required, please
provide the Dynasonics Customer Service Department
with this information.

TFXP - UUU

Power Supply

A) 115 VAC
B) 230 VAC

(two round terminals)
G) 230 VAC
(three rectangular
terminals)

Output 2*

1) 4-20mA
Output 1*

6) 200,000 event datalogger

Approvals

N) Class 1, Div 2 (pending)

Options

N) None

UUUA ---- UU

UUUUUU

UU

UUUU

Replacement Parts Part Number
TFXP Flow meter D040-0110-001

Data Logger, 200,000-event D020-1045-104
Padded carrying case D003-1012-002
Transducers, set of two D071-0105-000
Transducer Cable, 20 ft. [6m] D005-2112-020
Acoustic Grease, temporary mount D002-2011-001
Mounting Track, w/measuring scale D010-2102-010
Mounting Clamp, single D003-0139-002
36 inch SS hose clamp D002-2007-001
Power converter, 115V U.S. D005-2502-001
Power converter, 230V European D005-2502-002
Power converter, 230V U.K. D005-2503-003
Power cord, 12V cigarette-style D005-2116-002
4-20mA interconnect cable D005-2116-001
Infrared communicator and UltraLink D005-2115-100
Infrared communicator D005-2115-001
Manual, TFXP flow meter DTFXP O&M

Rev. 4/01 -1.7- TFXP

Transmitter

PART 1 - SPECIFICATIONS

Transducer

Rev. 4/01 -1.8- TFXP

PART 1 - TFXP TRANSMITTER CONNECTIONS

Transmitter Location
Considerations

After unpacking, it is recommended to save the shipping
carton and packing materials in case the instrument is
stored or re-shipped. Inspect the equipment and carton
for damage. If there is evidence of shipping damage, no­tify the carrier immediately.

When the TFXP is to be utilized for extend ed periods of
time in one location, the enclosure should be placed in
an area that is convenient for servicing, calibration or for
observation of the LCD readout.

1. Locate the transmitter within the length of transducer
cable that was supplied with the TFXP system. If this
is not possible, do not attempt to add additional cable
to the transducer. Contact the Dynasonics factory to
coordinate an exchange for the proper cable length.
Transducer cables that are up to 990 feet [300 me­ters] are available.

2. Place the TFXP transmitter in a location that is:

♦ Where little vibration exists.
♦ Protected from falling corrosive fluids.
♦ Within ambient temperature limits -40 to 185°F [-40 to

85°C]

♦ Out of direct sunlight. Direct sunlight may increase

temperatures within the transmitter to above maxi­mum limit.

3. If the transmitter will be subjected to a wet environ­ment, it is recommended that the cover remain closed
and the latches secured after configuration is com­pleted. The faceplate/keypad of the TFXP is water­tight, but avoid letting water collect on the keypad
area.

Rev. 4/01 -1.9- TFXP

PART 1 - TFXP TRANSMITTER CONNECTIONS

Electrical
Connections

Figure 1.4

Battery Charging and
External Power
Sources

It is highly recommended that the internal battery in the
TFXP be fully charged before using the meter for the first
time. Details covering this procedure are located on
Page 1.1 of this manual.

1. The connectors located on the side of the TFXP con­sist of three 1/4 turn BNC-type and one 5.5mm power
plug. These connectors are environmentally sealed,
but it is recommended not to allow water or other liq­uids to collect in the electrical connections pocket.

2. Connect the appropriate wires to the corresponding
connections on the transmitter. The transducer cable
has markings of UPSTREAM and DOWNSTREAM to
assist in the installation process. The UPSTREAM
transducer is the one located closer to the direction
from which fluid flow normally comes from (The fluid
normally passes the UPSTREAM transducer before
passing the DOWNSTREAM transducer.) If the trans­ducer wires are connected backwards, a negative flow
indication will be observed on the flow meter display.
See Figure 1.4 or the Wiring Diagram located on the
inner door of the transmitter.

NOTE: The transducer cables carry low level signals. Do
not attempt to add additional cable to the factory supplied
transducer cable. If additional cable is required, contact
the Dynasonics factory to arrange for an exchange trans­ducer with the appropriate length of cable. Cables to 990
feet [ 300 meters ] are available.

The 12 Volt DC power converter and 12 Volt cigarette­style power cord connect to the socket connection located
on the side of the enclosure. See Figure 1.4. A fully
charged battery will provide up to 24 hours of continuous
operation before recharging will be necessary. When the
battery level has decreased to a point where recharging is
required, the LOW BATTERY indicator will illuminate on
the front panel. At that point, the meter will only operate a
short time more until it automatically turns itself off—
preventing excessive battery discharge that can damage

Rev. 4/01 -1.10- TFXP

PART 1 - TFXP TRANSMITTER CONNECTIONS

the Gel Cell battery.
If the TFXP is to be used for extended periods of opera-

tion, the 12 Vdc line power converter or the 12 V cigarette
converter can remain connected indefinitely.

To charge the internal Gel Cell bat tery, apply power, utiliz­ing the enclosed 12 Vdc line power converter or cigarette­style power cord, to the TFXP for a period of 16-24 hours.
The TFXP has an integral charging circuit that prevents
overcharging. The instrument can be permanently con­nected to AC line power without damaging the flow meter
or the battery.

The Gel Cell battery is “maintenance free”, but it still re­quires a certain amount of attention to prolong its useful
life. To obtain the greatest capacity and longevity from the
battery, the following practices are recommended:

• Do not allow the battery to completely discharge.
(Discharging the battery to the point where the LOW
BATTERY indicator illuminates will not damage the
battery. Allowing the battery to remain discharged for
long periods of time can degrade the storage capacity
of the battery.) When not in use, continually charge
the battery by keeping the 12 Vdc line power converter
plugged in and connected to the flow meter. The
TFXP battery management circuitry will not allow the
battery to be come “over-charged”.

NOTE: The TFXP will automatically enter a low power
consumption mode approximately 1-1/2 minutes after the
LOW BATTERY indicator illuminates. This circuit pre­vents excessive discharge of the internal battery.

• If the TFXP is stored for prolonged periods of time,
monthly charging is recommended.

• If the TFXP is stored for prolonged periods of time,
store at a temperature below 70ºF [21ºC].

Use wiring practices that conform to local codes (National
Electric Code Handbook in the USA). Use only the power
converters that have been supplied with the TFXP flow
meter. The ground terminal, if present on the converter, is
mandatory for safe operation.

Rev. 4/01 -1.11- TFXP

PART 1 - TFXP TRANSMITTER CONNECTIONS

CAUTION: Any other wiring method may be unsafe or
cause improper operation of the instrument.

It is recommended not to run line power with other signal
wires within the same wiring tray or conduit.

NOTE: This instrument requires clean electrical line
power. Do not operate this unit on circuits with noisy com­ponents (i.e. Fluorescent lights, relays, compressors, vari­able frequency drives, etc.).

The TFXP can be operated from a 11-15 Vdc source, us­ing the included cigarette-style power cord, as long as it is
capable of supplying at least 3 Watts—observe proper po­larity.

Rev. 4/01 -1.12- TFXP

PART 1 - TFXP TRANSMITTER CONNECTIONS

General Information
Regarding Input/
Output: ISO-MODs

Standard

4-20 mA Output

The TFXP flow meter contains two Isolated Input/output
Modules (ISO-MODs); one located inside of the flow meter

enclosure and one that is user accessible, located under
the access door on the keyboard. The standard configu­ration of these modules is to have the internal module
configured as an actively powered 4-20 mA module and
the user accessible one as a Data Logger.

ISO-MODs are epoxy encapsulated electronic input/output
modules that are simple to install and replace in the field.
All modules are 2,500 volt optically isolated from TFXP
power and Earth grounds -- eliminating the potential for
ground loops and reducing the chance of severe damage
in the event of an electrical surge.

Seven ISO-MOD options are available including: 4-20 mA,
dual-relay, rate pulse, RS232C, RS485, 200k event data­logger and RTD heat-delivered option. TFXP supports
any two ISO-MOD input/output modules. All modules are
field configurable by utilizing the keyboard or ULTRALINK
interface. Field wiring connections to ISO-MODs are
quick and easy using pluggable terminals. Features of the
various ISO-MODs are described below. See the Series
TFXH addendum for details re garding the RTD Heatflow
Module option.

The 4-20 mA Output Module interfaces with virtually all re­cording and logging systems by transmitting an analog
current signal that is proportional to system flow rate. In­dependent 4 mA and 20 mA span settings are established
in software using the FL 4MA and FL 20MA settings in the
OUTPUT2 conf iguration menu. The se entries can be set
anywhere in the –40 to +40 fps [-12 to +12 mps] measur­ing range of the instrument. Output resolution of the mod­ule is 12-bits (4,096 discrete points). The module can
drive more than 800 ohms of load with its internally gener­ated 24 volt power source.

A 4-20 mA output interface cable has been included with
the TFXP package. Connect the 1/4-turn BNC connection
to the jack located on the side of the flow meter. See Fig-

Figure 1.5

Rev. 4/01 -1.13- TFXP

ure 1.5. The red clip on the cable provides the positive

PART 1 - TFXP TRANSMITTER CONNECTIONS

leg of the output and the black clip provides the negative
side. Verify that the sum of the resistances in the loop do
not exceed 800 Ohms.

Refer to Section 3 of this manual for detailed information
regarding the configuration, calibration and testing of the
4-20 mA output.

Standard

Data Logger

Figure 1.6

A 200,000-event data logger/electronic stripchart recorder
is located within the weather-tight pocket on the face plate
of the flow meter. See Figure 1.6. Loosen the three
thumbscrews located in the corners of the pocket cover
and rotate the cover to expose the Data Logger module.
The logger stores time-stamped, high resolution (16-bit)
data at user selected intervals ranging from 1 to 30,000
(8.33 hours) seconds. Configuration of and data retrieval
from the logger can be accomplished in one of two ways:

• The module is hot-swappable -- that is, it can be in-

stalled, removed from or replaced within the flow meter
without disconnecting power. The module can be car­ried in a shirt pocket back to the office and plugged
into a PC serial port via the module's integral DB9 con­nector.

• Via the DataLink software utility and the serial DB9 in-

terface cable included with the logger. Data can be ac­cessed by connecting the cable to the logger, which is
located in the pocket on the front faceplate of the in­strument. See Figure 1.6.

Refer to Section 3 of this manual for detailed information
regarding the configuration and operation of the Data Log­ger Module.

Optional

Control Relay

Rev. 4/01 -1.14- TFXP

Two independent SPDT (single-pole, double-throw, Form
C) relays are contained in this module. The relay opera­tions are user configured via software to act in either a

PART 1 - ISO-MOD

flow rate alarm, signal strength alarm or totalizer/batching
mode. The relays are rated for 200 Vac max. and have a
current rating of 0.5 A resistive load [175 Vdc @ 0.25 A re­sistive]. It is highly recommended that a slave relay be
utilized whenever the Control Relay ISO-MOD is used to
control inductive loads such as solenoids and motors.

Optional

0-10 kHz Output

Optional

RS232C I/O

The Rate Pulse Output Module is utilized to transmit infor­mation to external counters and PID systems via a fre­quency output that is proportional to system flow rate.
This module does not source voltage at its output, it must
be connected in an “open-collector” fashion with an exter­nal power source and pull-up resistor. Independent Zero
and Span settings are established in software using the
Flow Measuring Range entries. These entries can be set
anywhere in the –40 to +40 fps [-12 to +12 mps] measur­ing range of the instrument. Output resolution of the mod­ule is 12-bits (4,096 discrete points) and the maximum
output frequency setting is 10,000 Hz. The MOSFET can
support loads of 100V @ 9A.

The RS232 Module can be interfaced with the serial com­munication ports of PCs, PLCs and SCADA systems that
are used to monitor flow rate information in piping sys­tems. The RS232 Module may also be used to form a
hardwire connection to a PC that is running the UltraLink
software utility. Baud rates up to 19.2k are supported.

Optional

RS485 I/O

Optional

RTD-BTU

Rev. 4/01 -1.15- TFXP

The RS485 Module allows up to 126 TFXP systems to be
placed on a single three-wire cable bus. All meters are
assigned a unique one byte serial number that allows all
of the meters on the cable network to be independently
accessed. Baud rates up to 19.2k and cable lengths to
1,000 feet [300 meters] are supported .

See the Appendix of this manual for information regarding
connection and operation of the optional RTD-BTU option.

PART 2 - TRANSDUCER POSITIONING

General

The transducers that are u tilized by the Series TFXP
contain piezoelectric crystals for transmitting and
receiving ultrasound signals through walls of liquid
piping systems. The transducers are relatively simple
and straight-forward to install, but spacing and
alignment of the transducers is critical to the system's
accuracy and performance. Extra care should be
taken to ensure that these instructions are carefully
executed.

Mounting of the clamp-on ultrasonic transit time
transducers is comprised of three steps. In general,
these steps consist of:

1. Selection of the optimum location on a piping
system.

2. Entering the pipe and liquid parameters into either
the optional software utility (UltraLink) or keying in
the parameters into the TFXP keypad. The
software embedded in UltraLink and TFXP will
calculate proper transducer spacing based on
these entries.

3. Pipe preparation and transducer mounting.

1. Mounting Location

1. Mounting Location

1. Mounting Location1. Mounting Location

The first step in the installation process is the
selection of an optimum location for the flow
measurement to be made. For this to be done
effectively, a basic knowledge of the piping system
and its plumbing are required.

An optimum location would be defined as a piping
system that is completely full of liquid when
measurements are being taken and has lengths of
straight pipe such as those described in Table 2.1.
The optimum straight pipe diameter
recommendations apply to pipes in both horizontal
and vertical orientation.

Rev. 4/01 - 2.1 - TFXP

PART 2 - TRANSDUCER POSITIONING

Table 2.1

1

The TFXP system will provide repeatable measurements on piping systems that do not meet these

requirements, but the accuracy

of these readings may be influenced to various degrees.

1

Rev. 4/01 - 2.2 - TFXP

PART 2 - TRANSDUCER POSITIONING

2. Transducer Spacing

2. Transducer Spacing

2. Transducer Spacing2. Transducer Spacing

TFXP transit time flowmeters utilize two transducers
that function as both ultrasonic transmitters and
receivers. The transducers are clamped on the
outside of a closed pipe at a specific distance from
each other. The transducers can be mounted in V­mode where the sound transverses the pipe two times,
W-mode where the sound transverses the pipe four
times, or in Z-mode where the transducers are
mounted on opposite sides of the pipe and the sound
crosses the pipe once. See Figures 2.1-2.3. This
selection is based on pipe and liquid characteristics.
The flowmeter operates by alternately transmitting and
receiving a frequency modulated burst of sound
energy between the two transducers and measuring
the time interval that it takes for sound to travel
between the two transducers.

IMPORTANT: Since the time interval being measured
is influenced by the transducer spacing, it is critical
that the transducer spacing be measured on the pipe
accurately to assure optimum performance from the
TFXP system.

The TFXP system calculates proper transducer
spacing by utilizing piping and liquid information
entered by the user. This information can be entered
via the keypad or the UltraLink Windows software
utility and a laptop computer.

The following information will be required before
programming the instrument:

1. Transducer mounting configuration. Use the
following guide to determine the optimum mounting
method for a particular installati o n:

Rev. 4/01 - 2.3 - TFXP

PART 2 - TRANSDUCER POSITIONING

V-Mount
Configuration

W-Mount
Configuration

Figure 2.1 V-Mount. Reflective type (transducers

mounted on one side of the pipe) of installation used
primarily on pipe sizes in the 3-10 inch [75-250 mm]
internal diameter range.

Figure 2.1 - Transducer V-Mount

Figure 2.2 W-Mount. Reflective type (transducers

mounted on one side of the pipe) of installation used
primarily on plastic pipe sizes in the 1-3 inch [25-75
mm] internal diameter range. Metal pipes will typically
require the V-Mount for proper operation.

Figure 2.2 - Transducer W-Mount

Rev. 4/01 - 2.4 - TFXP

PART 2 - TRANSDUCER POSITIONING

Z-Mount
Configuration

Figure 2.3 Z-Mount. Direct type (transducers

mounted on opposite sides of the pipe) of installation
used primarily on pipe sizes in the 10-100 inch [250­2540 mm] internal diameter range.

Figure 2.3 - Transducer Z-Mount

In addition, the following information is required before
mounting the transducers on the pipe.

2. Pipe O.D. (Outside Diameter)

3. Pipe wall thickness

4. Pipe material

5. Pipe sound speed1

1

6. Pipe relative roughness

7. Pipe liner thickness (if present)

8. Pipe liner material (if present)

9. Fluid type

10. Fluid sound speed

1

11. Fluid viscosity1

1

12. Fluid specific gravity

1

Nominal values for these parameters are included
within the TFXP operating system. The nominal
values may be used as they appear or may be
modified if exact system values are known.

Rev. 4/01 - 2.5 - TFXP

PART 2 - TRANSDUCER POSITIONING

Keypad Entry

The TFXP contains a tactile feedback keypad interface
that allows the user to configure parameters used by
the TFXP operating system.

Graphics Display
Soft Keys
Arrow Keys
Numeric Keys
Infrared Communications Port

The TFXP system can be configured using UltraLink
and a laptop computer. Please refer to page 2.13 for
details regarding data entry in UltraLink.

The following “Soft Key” menu items will be displayed
immediately above the two keys located in the lower
corners of the Graphics Display.

1. The (soft)MENU key is pressed from RUN mode to

enter PROGRAM mode. The (soft)EXIT key is
pressed in PROGRAM mode to exit configuration
parameters and menus. If changes to any
configuration parameters have been made, the
user will be prompted with a SAVE? (soft)YES or
(soft)NO when returning to RUN mode. If no
changes have been made, the user will not be
prompted for to SAVE.

2. The UP/DOWN ARROW keys are used to scroll

through menus and configuration parameters. The
ARROW keys can also be used to adjust
parameter numerical values. In RUN mode the
UP/DOWN ARROW keys are used to adjust the
display contrast level.

3. The Numerical Keypad is used for entering

numerical values.

Rev. 4/01 - 2.6 - TFXP

PART 2 - TRANSDUCER POSITIONING

4. The (soft)EDIT key is used to

• access the configuration parameters in the various

menus.

• initiate changes in configuration parameters.

5. The (soft)ACCEPT key is used to

• accept configuration parameter changes.

Graphics Display
Configuration

6. The (soft)SELECT key is used to

• Configure the engineering units on the graphics

display—Press the (soft)SELECT key from RUN
mode to highlight the engineering unit presently
being displayed on the graphics display (pressing
the SELECT key multiple times will toggle the
highlighted unit from line to line). Use the UP/
DOWN ARROW keys to select display units of

• RATE

• TOTALizer

• VELocity

• SIGNAL STRength

• From Menu 7, Display Menu, the number of

graphics display lines can be toggled between two
and four lines.

Menu 1, the BASIC menu contains all of the
configuration parameters necessary to make the
transducer spacing calculation.

UNITS Entry

UNITS
ENGLSH

METRIC

Installs a global measurement standard into the
operation of the instrument. The choices are either
English or Metric measurements.

• Select ENGLSH if all configurations (pipe sizes,

etc.) are to be made in inches. Select METRIC if
the meter is to be configured in millimete rs.

• The ENGLSH/METRIC selection will also co nfigure

Rev. 4/01 - 2.7 - TFXP

PART 2 - TRANSDUCER POSITIONING

the TFXP to display sound speeds in pipe
materials and liquids as either feet per second or
meters per second respectively.

Transducer Mount
Configuration

XDCR MNT -- Transducer Mounting Method
V

W
Z

Selects the mounting orientation for the transducers.
The selection of an appropriate mounting orientation is
based on pipe and liquid characteristics. Refer to

Figures 2.1-2.3 in this manual.

V -- Mount. A reflective type (transducers mounted on

one side of the pipe) of installation used primarily on
pipe sizes in the 3-10 inch [75-250 mm] internal
diameter range.

W -- Mount. A reflective type (transducers mounted
on one side of the pipe) of installation used primarily
on pipe sizes in the 1-3 inch [25-75 mm] internal
diameter range.

Z -- Mount. A direct type (transducers mounted on
opposite sides of the pipe) of installation used
primarily on pipe sizes in the 10-100 inch [250-2540
mm] internal diameter range.

Pipe O.D. Entry

Pipe Wall Entry

Rev. 4/01 - 2.8 - TFXP

PIPE OD -- Pipe Outside Diameter Entry
ENGLSH (Inches)

METRIC (Millimeters)

Enter the pipe outside diameter
was selected as UNITS; in millimeters if METRIC was
selected.

PIPE WT -- Pipe Wall Thickness Entry
ENGLSH (Inches)

METRIC (Millimeters)

in inches if ENGLSH

PART 2 - TRANSDUCER POSITIONING

Pipe Material Entry

Pipe Sound Speed
Entry

Enter the pipe wall thickness in inches if ENGLSH was
selected as UNITS; in millimeters if METRIC was
selected.

PIPE MAT -- Pipe Material Selection
CARBON S - Carbon Steel

STAINLES - Stainless Steel
CAST IRO - Cast Iron
DUCTILE - Ductile Iron
COPPER - Copper
PVC - Polyvinylchloride
PVDF LOW ­ PVDF HI - High Density Polyvinylidene Flouride
ALUMINUM - Aluminum
ASBESTOS - Asbestos Cement
FIBERGLA - Fiberglass
OTHER

This list is provided as an example. Additional
materials are being added continuously. Select the
appropriate pipe material from the list or select
OTHER if the material is not listed.

PIPE SS -- Speed of Sound in the Pipe Material
ENGLSH (Feet per Second)

METRIC (Meters per Second)

Allows adjustments to be made to the speed of sound
in the pipe wall. If the UNITS value was set to
ENGLSH, the entry is in FPS (feet per second).
METRIC entries are made in MPS (meters per
second).

Low Density Polyvinylidene Flouride

If a pipe material was chosen from the PIPE MAT list,
a nominal value for speed of sound in that material will
be automatically loaded. If the actual sound speed
rate is known for the application piping system and
that value varies from the automatically loaded value,
the value can be revised.

If OTHER was chosen as PIPE MAT, a PIPE SS will
need to be entered.

Rev. 4/01 - 2.9 - TFXP

PART 2 - TRANSDUCER POSITIONING

Pipe Roughness
Entry

Liner Material Entry

Liner Thickness
Entry

PIPE R -- Pipe Material Relative Roughness
UNITLESS VALUE

The DTFXP provides Reynolds Number compensation
in its flow measurement calculation. The ratio of
average surface imperfection as it relates to the pipe
internal diameter is used in this comp ensation.

Linear RMS measurement of the pipe
PIPE R = internal wall surface
Internal Diameter of the pipe

If a pipe material was chosen from the PIPE MAT list,
a nominal value relative roughness in that material will
be automatically loaded. If the actual roughness is
known for the application piping system and that value
varies from the automatically loaded value, the value
can be revised.

If OTHER was chosen as PIPE MAT, a PIPE R may to
be entered.

LINER T -- Pipe Liner Thickness Entry
ENGLSH (Inches)

METRIC (Millimeters)

Enter the pipe liner thickness
inches if ENGLSH was selected as UNITS; in
millimeters if METRIC was selected.

[If a LINER Thickness was selected]
LINER MAT - Liner Material

TAR EPOXY
RUBBER
MORTAR
POLYPROPYLENE
POLYSTYROL
POLYSTYRENE
POLYESTER

. Enter this value in

Rev. 4/01 - 2.10 - TFXP

PART 2 - TRANSDUCER POSITIONING

Liner Sound Speed
Entry

Fluid Type Entry

POLYETHYLENE
EBONITE
TEFLON
Other

This list is provided as an example. Additional
materials are being added continuously. Select the
appropriate material from the list or select OTHER if
the liner material is not listed.

LINER SS -- Speed of Sound in the Liner
ENGLSH (Feet per Second)

METRIC (Meters per Second)

Allows adjustments to be made to the speed of sound
in the liner. If the UNITS value was set to ENGLSH,
the entry is in FPS (feet per second). METRIC entries
are made in MPS (meters per second).
If a liner was chosen from the LINER MAT list, a
nominal value for speed of sound in tha t media will be
automatically loaded. If the actual sound speed rate is
known for the pipe liner and that value varies from the
automatically loaded value, the value can be revised.

FL TYPE - Fluid/Media Type

TAP WATER
SEWAGE
SEA WATE
KEROSENE
GASOLINE
FUEL OIL
CRUDE OI
PROPANE
BUTANE
OTHER

This list is provided as an example. Additional liquids
are being added continuously. Select the appropriate
liquid from the list or sele ct OTHER if the liquid is not
listed.

Rev. 4/01 - 2.11 - TFXP

PART 2 - TRANSDUCER POSITIONING

Fluid Sound Speed
Entry

Fluid Viscosity Entry

FLUID SS -- Speed of Sound in the Fluid
ENGLSH (Feet per Second)

METRIC (Meters per Second)

Allows adjustments to be made to the speed of sound
in the liquid. If the UNITS value was set to ENGLSH,
the entry is in FPS (feet per second). METRIC entries
are made in MPS (meters per second).

If a fluid was chosen from the FL TYPE list, a nominal
value for speed of sound in that media will be
automatically loaded. If the actual sound speed rate is
known for the application fluid and that value varies
from the automatically loaded value, the value can be
revised.

If OTHER was chosen as FL TYPE, a FLUID S S will
need to be entered. A list of alternate fluids and their
associated sound speeds are located the Appendix
located at the back of this manual.

FLUID VI -- Absolute Viscosity the Fluid
cps

Allows adjustments to be made to the absolute
viscosity of the liquid.

If a fluid was chosen from the FL TYPE list, a nominal
value for viscosity in that media will be automatically
loaded. If the actual viscosity is known for the
application fluid and that value varies from the
automatically loaded value, the value can be revised.

If OTHER was chosen as FL TYPE, a FLUID VI will
need to be entered. A list of alternate fluids and their
associated viscosities are located the Appendix
located at the back of this manual.

Fluid Specific
Gravity Entr y

Rev. 4/01 - 2.12 - TFXP

SP GRVTY -- Fluid Specific Gravity Entry
unitless

Allows adjustments to be made to the specific gravity
(density) of the liquid.

PART 2 - TRANSDUCER POSITIONING

Transducer Spacing
Calculation

If a fluid was chosen from the FL TYPE list, a nominal
value for specific gravity in that media will be
automatically loaded. If the actual specific gravity is
known for the application fluid and that value varies
from the automatically loaded value, the value can be
revised.

If OTHER was chosen as FL TYPE, a SP GRVTY may
need to be entered if mass flows are to be calculated.
A list of alternate fluids and their associated specific
gravities are located the Appendix located at the back
of this manual.

XDCR SPAC -- Transducer Spacing Calculation
ENGLSH (Inches)

METRIC (Millimeters)

This value represents the one-dimensional linear
measurement between the transducers (the upstream/
downstream measurement that runs parallel to the
pipe). This value is in inches if ENGLSH was selected
as UNITS, in millimeters if METRIC was selected.
This measurement is taken from the line which is
scribed into the side of the transducer block.

Important note for pipe sizes under 2 inches [50 mm].
If the transducer spacing that is calculated is lower
than 2.65 inches [67 mm], enter W-mount as the
transducer mount method or enter V- mou nt and pl ace
the transducers at 2.65 inches [67 mm]. See Page

2.21 for additional details .

UltraLink Entry

Rev. 4/01 - 2.13 - TFXP

UltraLink Data Entry

The UltraLink Windows®-based software utility
provides an efficient means for entering piping and
liquid parameters through the use of pop-up window/
pull-down menu structures. Data can be entered into
UltraLink, stored, later retrieved and downloaded at

PART 2 - TRANSDUCER POSITIONING

the TFXP installation site (provided that UltraLink and
TFXP communications are not enabled at the time of
data entry) or it can be downloaded immediately to the
TFXP meter (provided that UltraLink and TFXP
communications are enabled during data entry).

To install UltraLink and establish communications with
a PC, please follow the instructions enclosed with the
UltraLink software package or in the Appendix of this
manual.

The system information required for entry into the
UltraLink package is identical to that required for
Keypad Entry covered in the previous section. See
pages 2.3-2.5.

After initializing UltraLink, click on the button labeled

Transducer
spacing
appears here.

Figure 2.4 UltraLink Windows-based software utility configuration
screen.

Rev. 4/01 - 2.14 - TFXP