Dynasonics TFX Specifications
Transit Time Flow Meters
TFX Ultra
DESCRIPTION
The TFX Ultra transit time meter measures clean liquids as well as
those with small amounts of suspended solids or aeration such as
surface water or sewage.
FEATURES
• Bi-directional flow measurement system
• Totalizer options include forward, reverse and net total
• Modbus RTU or BACnet MSTP over RS485; Ethernet
connections including BACnet/IP, EtherNet/IP, and
Modbus TCP/IP protocols
• Large, easy-to-read digital display
• Rugged, aluminum enclosure ensures a long service life in
harsh environments
• Certified for hazardous area installation in North America
and Europe
APPLICATIONS
TFX Ultra ultrasonic flow and energy meters clamp onto the outside
of pipes and do not contact the internal liquid. The technology has
inherent advantages over alternate devices including: low-cost
installation, no pressure head loss, no moving parts to maintain or
replace, and a large, bi-directional measuring range that ensures
reliable readings even at very low and high flow rates. The
TFX Ultra is available in a variety of configurations that permit the
user to select a meter with features suitable to meet particular
application requirements.
The TFX Ultra is available in two versions:
• A flow meter
• An energy flow meter used in conjunction with dual
clamp-on RTDs for temperature measurement—ideal for
retrofit, hydronic process and HVAC applications
OPERATION
Transit time flow meters measure the time difference between
the travel time of an ultrasound wave going with the fluid flow
and against the fluid flow. The time difference is used to calculate
the velocity of the fluid traveling in a closed-pipe system. The
transducers used in transit time measurements operate alternately
as transmitters and receivers. Transit time measurements are
bi-directional and are most effective for fluids that have low
concentrations of suspended solids.
Temperature measurements, when used in conjunction with flow
measurement, can yield energy usage readings in the form of heat
flow. To find the net heat loss or gain, energy usage is calculated by
multiplying the flow rate of the heat transfer fluid by the change of
heat content in that fluid after it has done some kind of work.
An ultrasonic meter equipped with heat flow capabilities is
designed to measure the rate and quantity of heat delivered or
removed from devices such as heat exchangers. The instrument
measures the volumetric flow rate of the heat exchanger liquid, the
temperature at the inlet pipe and the temperature
at the outlet pipe.
Rate of Heat Delivery = Q × (Tin – T
Where
Q = Volumetric ow rate
Tin = Temperature at the inlet
T
= Temperature at the outlet
out
C = Heat capacity
ρ = Density of uid
By applying a scaling factor this heat flow measurement can be
expressed in various units: Btu, Watts, Joules, Kilowatts, and others.
) × C × ρ
out
TTM-DS-00085-EN-09 (June 2019)
Product Data Sheet
TFX Ultra Transit Time Flow Meter
COMMON FEATURES
• Rate-Total Backlit Display
• 4…20 mA Output
• 0…1000 Hz Rate Pulse and Dual Alarm Outputs
(Flow Meter Model only)
• Auxiliary Total Pulse Output 0…16 Hz
(Energy Meter model only)
• USB Programming Port
• RS485 Modbus Network Connection
• Remote Totalizer Reset
METER WITH REMOTE FLOW TRANSDUCER
METER WITH INTEGRAL FLOW TRANSDUCER
For pipe/tubing sizes of 2 in. (50 mm) and smaller, the TFX Ultra meter
is available with a clamp-on transducer mounted and wired directly
to the flow meter display/electronics enclosure. This design provides
a convenient installation in areas where local indication is required.
Bottom View
Integral Flow Transducer
Front View
Supply
Temperature Transducers
(Energy Meter Only)
Return
RAIL MOUNTING KIT
The TFX Ultra is available with remote mounted transducers that
permit separation of up to 990 feet (300 m). This design is used
on larger pipes or when pipes are located in areas that are not
convenient for viewing, or on piping systems with severe vibration.
Remote Flow
Transducers
Supply
Temperature Transducers
(Energy Meters Only)
Return
For remote flow DTTR transducers, the rail mounting kit aids in
installation and positioning of the transducers. Transducers slide
on the rails, which have measurement markings that are viewable
through the sight opening.
Page 2 June 2019
TTM-DS-00085-EN-09
Product Data Sheet
NETWORK OPTIONS
RS485 Network
All TFX Ultra meters come equipped with an RS485 and use a Modbus RTU command set (data can be returned in single-precision, doubleprecision, integer or oating point values) or an optional BACnet MSTP protocol. Up to 126 Ultra products can be run on a single daisy-chain
network and be individually queried for ow rate, positive ow accumulator, negative ow accumulator, supply temperature, return temperature
and signal strength. Flow accumulators can be cleared at discrete addresses or globally. The RS485 network is also compatible with EnergyLink,
direct to Excel, application. (EnergyLink is compatible with Modbus RTU only.)
Address 126Address 2Address 1
RS485
converter
3-wire + shield
4000 feet (1220 m) max. without repeaters
Ethernet 10/100 Base-T Network
If equipped with the optional Ethernet communications module, the TFX Ultra can be plugged into a LAN and queried for flow rate, positive
flow accumulator, negative flow accumulator, supply temperature, return temperature and signal strength. The module contains
Modbus TCP/IP, EtherNet/IP and BACnet/IP network compatibility.
Device N Device 3 Device 2 Device 1
LAN
RTD KITS FOR INTEGRAL AND REMOTE ENERGY MEASUREMENT METERS
D010-3000-120 RTD Kit1, clamp on, 130° C, 1000 Ohm, 20 ft D010-3000-200 Insertion RTD Kit2, 3 in., 1/4 in. O.D., 260° C, 1000 Ohm, 20 ft
D010-3000-121 RTD Kit1, clamp on, 130° C, 1000 Ohm, 50 ft D010-3000-201 Insertion RTD Kit2, 3 in., 1/4 in. O.D., 260° C, 1000 Ohm, 50 ft
D010-3000-122 RTD Kit1, clamp on, 130° C, 1000 Ohm, 100 ft D010-3000-202 Insertion RTD Kit2, 3 in., 1/4 in. O.D., 260° C, 1000 Ohm, 100 ft
1
D010-3000-123 RTD Kit1, clamp on, 200° C, 1000 Ohm, 25 ft
D010-3000-124 RTD Kit1, clamp on, 200° C, 1000 Ohm, 50 ft
RTD Kits include: 2 RTDs, heat sink compound and installation tape
2
Insertion RTD Kits include: A set of 2 RTD
D010-3000-125 RTD Kit1, clamp on, 200° C, 1000 Ohm, 100 ft
MOUNTING SYSTEM FOR DTTR TRANSDUCERS MOUNTING SYSTEM FOR DTTN TRANSDUCERS
D010-2102-310 10 in. scaled mounting rail system D010-2102-010 10 in. scaled mounting rail system
D010-2102-016 16 in. scaled mounting rail system
TTM-DS-00085-EN-09
Page 3 June 2019
TFX Ultra Transit Time Flow Meter
SPECIFICATIONS
System
Liquid Types Most clean liquids or liquids containing small amounts of suspended solids or gas bubbles
Velocity Range Bi-directional to greater than 40 FPS (12 MPS)
DTTR/DTTN/DTTH/DTTL/
Flow Accuracy
Temperature
Accuracy
(Energy Models
Only)
Sensitivity
Repeatability 0.5% of reading
Installation
Compliance
Easy Rail (DTTJ/DTTK):
DTTS/DTTC:
DTTS/DTTC:
Option A:
Option B:
Option C:
Option D:
Flow: 0.001 FPS (0.0003 MPS)
Temperature:
Option A:
Option B:
Option C:
Option D:
General Safety (all models): UL 61010-1, CSA C22.2 No. 61010-1; (power options A and D only) EN 61010-1
Hazardous Location (power supply options A and D only): Class I Div. 2 Groups C, D, T4; Class II, Division 2, Groups F, G,
T4; Class III Division 2 for US/CAN; Standards: UL 1604, CSA 22.2 No. 213, ANSI/ISA 12.12.01 (2013)
Compliant with directives 2004/108/EC, 2006/95/EC and 94/9/EC on meter systems with integral flow transducers, transducers
constructed with twinaxial cable (all transducers with cables 100 ft (30 m) and shorter) or remote transducers with conduit
32…122° F (0…50° C)
32…212° F (0…100° C)
–40…350° F (–40…177° C)
–4…85° F (–20…30° C)
0.03° F (0.012° C)
0.05° F (0.025° C)
0.1° F (0.06° C)
0.03° F (0.012° C)
±1% of reading or ±0.01 FPS (0.003 MPS), whichever is greater
1 in. (25 mm) and larger = ±1 % above 1 FPS (0.3 MPS) and ±0.01 FPS below 1 FPS
3/4 in. (19 mm) and smaller = ±1% of full scale
Absolute: 0.22° F (0.12° C)
Absolute: 0.45° F (0.25° C)
Absolute: 1.1° F (0.6° C)
Absolute: 0.22° F (0.12° C)
Difference: 0.09° F (0.05° C)
Difference: 0.18° F (0.1° C)
Absolute: 1.1° F (0.6° C) Difference: 0.45° F (0.25° C)
Absolute: 0.22° F (0.12° C)Difference: 0.09° F (0.05° C)
Transmitter
Power
Requirements
Display
Enclosure
Temperature –40…131° F (–40…55° C) for line AC power with Ethernet option; –40…149° F (–40…65° C) for all others
Configuration
Engineering
Units
Inputs/Outputs
AC:
DC:
Protection:
Two line LCD, LED backlit:
Icons: RUN, PROGRAM, RELAY1, RELAY2
Flow rate indication: 8-digit positive, 7-digit negative max. Auto decimal, lead zero blanking
Flow accumulator (totalizer):
NEMA Type 4 (IP-65)
Construction:
Size: 6.0 in. W x 4.4 in. H x 2.2 in. D (152 mm W x 112 mm H x 56 mm D)
Conduit Holes: (2) 1/2 in. NPT female; (1) 3/4 in. NPT female; Optional Cable Gland Kit
Via optional keypad or PC running ULTRALINK software
(Note: not all configuration parameters are available from the keypad—for example flow and temperature calibration and advanced
filter settings)
Flow-Only Model:
Energy Model: Btu, mBtu, mmBtu, tons, kJ, kW, MW, kilocalorie, megacalorie
USB 2.0: For connection of a PC running ULTRALINK configuration utility
RS485: Modbus RTU command set or BACnet® MSTP; Baud rates 9600, 14400,19200, 38400, 56000, 57600, 76800
Ethernet: Optional 10/100 Base T RJ45, communication via Modbus TCP/IP, EtherNet/IP, or BACnet/IP
4-20 mA: 12-bit, internal power, can span negative to positive flow/energy rates
Input: Reset totalizer when input is connected to signal ground
Energy Model:
Flow-Only Model:
95…264 V AC 47…63 Hz @ 17 VA max. or 20…26 V AC 47…63 Hz @ 0.35 A max.
10…28 V DC @ 5 W max.
Auto resettable fuse, reverse polarity and transient suppression
Top row 0.7 inch (18 mm) height, 7-segment
Bottom row 0.35 inch (9 mm) height, 14-segment
8-digit positive, 7-digit negative max. Reset via keypad, ULTRALINK, network command or momentary
contact closure
Powder-coated aluminum, polycarbonate, stainless steel, polyurethane, nickel-plated steel mounting
brackets
Feet, gallons, cubic feet, million gallons, barrels (liquid and oil), acre-feet, pounds, meters, cubic meters,
liters, million liters, kilograms
Total Pulse: Opto isolated open collector transistor
2…28V DC, 100 mA max, 30 ms pulse width up to 16 Hz, 12-bit resolution, can span negative to positive
rates; square-wave or turbine meter simulation outputs. Cannot be used with Ethernet option
Frequency Output: Open collector, 10…28V DC, 100 mA max, 0…1000 Hz; square wave or turbine
meter simulation
Two Alarm Outputs: Open-collector, 10…28V DC, 100 mA max, congure as rate alarm, signal strength
alarm or totalizer pulse (100 ms pulse width up to 1 Hz max )
Page 4 June 2019
TTM-DS-00085-EN-09
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