Liquid Ultrasonic Flow Transmitters

Model FTCSLFC, DC Powered, Frequency Output, Flows to 3000 GPM, 3" to 10" Pipe

DESCRIPTION

Clark Sonic^® Ultrasonic Flowmeters are ideal for measurement of flow rates of acoustically conductive liquids including most clean liquids and many liquids with entrained solids.

Main advantages include excellent long term stability, no pressure drop, broad fluid compatibility, high accuracy and low cost. Also, there are no moving parts.

At the heart of the transmitter is a proprietary 
mixed signal ASIC which allows sophisticated 
timing, control and transducer drive circuitry 
to be combined on a single integrated circuit. 
The ASIC uses a special algorithm that is an improvement upon 
the standard single-path measurement technique. Using the 
"sing around" method, the ultrasonic transducer alternates between 
transmitting and receiving to measure differences in flight time between 
upstream and downstream transmissions. A sound pulse is transmitted from 
an upstream transducer towards a downstream transducer like a traditional 
time-of-flight measurement.  However, the received sound pulse then triggers 
a second downstream transmission that then triggers a third and so on for a 
specific number of cycles. This process is repeated in the upstream direction.

Because it takes an average flight time over multiple cycles to compute the 
difference in flight times, the approach yields a significant improvement in timing 
accuracy when compared with the time-of -flight difference of a single sound pulse 
in each direction. This algorithm, combined with the pico-second timing resolution 
of the ASIC, provides the precise time measurement capability necessary for compact, 
small diameter ultrasonic meters.

The output of the transmitter is unaffected by changes in fluid temperature, density 
and viscosity as the flow calculation is independent of the speed of sound.

Wetted materials include ULTEM^® encapsulated ultrasonic transducers with a choice 
of elastomer seals and epoxy coated carbon steel body material.

SPECIFICATIONS
GENERAL

Flow Range: Bi-directional, field selectable per "Standard Models" table
Accuracy: ±0.75% of full scale
Operating Temperature: -40 to 190°F (-40 to 87.8°C)
Response Time: User selectable, 2 or 10 seconds
Viscosity Range: 0.2 to 150 cSt (0.2 to 150 mPas)
Liquid Density: 30.6 to 74.9 lb/cu.ft. (490 to 1200 kg/m3)
Max. Working Pressure: 200 PSI (13.8 bars)
Pipe Sizes: 3", 4", 6", 8", 10"
Pipe Connections: ASME class 150 flange
Electrical Enclosure: Integral to Body casting with gasketed cover; One 1/2" 
    NPT conduit connection (plugged when model ordered with metric threads) 
    and one M16 x 1.5 connection (plugged when model ordered with NPT threads)
Electrical Connections: Screw terminal connections on PC board
Optional Electrical Connections: 4 or 8 pin circular receptacle installed in 1/2" conduit connection and 
internally wired to transmitter connections. Available in 2, 5 and 10 meter lengths (other lengths on request).
Enclosure Rating: NEMA 4 (IP 65)
Power: 18 to 36 VDC
Optional Temperature Sensor: 3 wire RTD, 100 Ohm, Platinum, 0.06% accuracy. Built in to transducer shell for 
monitoring process temperature. Optional 8 pin electrical connector standardly supplied with this option.

WETTED MATERIALS

Ultrasonic Transducers: ULTEM^® Encapsulated
Seals: EPDM, Buna-N, Neoprene^™, FKM, or other
Body Material: Schedule 40, epoxy coated, carbon steel pipe

OUTPUT

Frequency: Output is an optically isolated NPN transistor capable of sinking up to 25 mA from a voltage source 
of no more than 48 VDC. Frequency output is from 10 to 1200 pulses/gallon depending on range
(see Standard Model table).


3" to 10" Schedule 40 Carbon Steel Pipe, ASME 150 Flange

Pipe Size	Dimensions (Inches)
Pipe Size	A	B	C	D	E	F	Bolt Circle Diameter	Number of Holes
3"	11.00	7.50	3.50	6.54	2.62	0.75	6.00	4
4"	13.00	9.00	4.00	6.54	2.62	0.75	7.50	8
6"	16.00	11.00	5.09	6.54	2.62	0.88	9.50	8
8"	18.00	13.50	6.11	6.54	2.62	0.88	11.75	8
10"	22.00	16.00	7.18	6.54	2.62	1.00	14.25	12



Optional NEMA 4 four or eight-pin receptacles installed in transmitter 
conduit connection and factory wired along with cordsets ordered 
to length simplify field installation.



		4R/C & 8R/C Circular

WIRING

STANDARD MODELS

Model	Pipe Size	Full Scale Ranges (GPM)			Full Scale Ranges (LPM)
Model	Pipe Size	Min.	Max.	Pulses/Gallon	Min.	Max.	Pulses/Liter
FTCSLFC3	3"	6	400	75	23	1500	20
FTCSLFC4	4"	7.5	500	60	29	1900	16
FTCSLFC6	6"	18	1200	25	68	4500	7
FTCSLFC8	8"	15	2000	15	114	7600	4
FTCSLFC10	10"	45	3000	10	165	11000	3

FIELD SERVICE

Two opposing FTCSLFC ultrasonic transducers are inserted into fixed ULTEM^® drywells and held in place 
with light spring force. A locating keyway in the drywell aids insertion and positioning of the transducers. 
In the event of field failure of a transducer, replacement is straightforward and can be accomplished without 
removing the pipe spool and shutting down the process.

The electrical PC board can also be field replaced. Calibration factor and other specific information are maintained 
at the factory for all transmitters shipped.


  
    Transducer Components
  
  
    1
    Spring Retainer
  
  
    2
    Spring
  
  
    3
    Clamp
  
  
    4
    Bushing
  
  
    5
    Drywell
  
  
    6
    Ultrasonic Transducer

Transducer Components
1	Spring Retainer
2	Spring
3	Clamp
4	Bushing
5	Drywell
6	Ultrasonic Transducer

DP/DS PANEL METER/DISPLAY OPTION

Digital panel meter installed on transmitter
Power Supply: Loop Powered
Display: 4-1/2 Digit LED, 0.6"
Case: NEMA 4X
Versions: DP Option: Displays 0-100% F.S
                  DS Option: Scaled to customer requirement


	Panel Meter/Display option Four or eight pin receptacle connector recommended.

ORDERING INFORMATION

ORDER NUMBER ABC
Example: FTCSLFC10GBRTD8R

PLEASE CALL 1-800-253-2497 TO ORDER THESE ITEMS
A=Model	B=Units of Measure	C=Transducer Seal
FTCSLFC3	G= Gallons Per Minute (U.S.)	E= EPDM
FTCSLFC4	L= Liters Per Minute	B= Buna-N
FTCSLFC6		N= Neoprene®
FTCSLFC8		V= FKM
FTCSLFC10

Options
RTD= Integrated RTD
4R= 4-Pin Female Circular Receptacle Connector
8R= 8-Pin Female Circular Receptacle Connector ( use with RTD Option)
4C=4-Pin Male Circular Connector, Field Wired
8C=8-Pin Male Circular Connector, Field Wired

ULTEM^® is a registered trademark of The General Electric Company
Neoprene^® is a registered trademark of DuPont Dow
Clark reserves the right to make design changes without prior notice.

Ask about our remote mount Series 1000 & 2000 flow rate indicators and totalizers

Optional NEMA 4 four or eight-pin receptacles installed in transmitter conduit connection and factory wired along with cordsets ordered to length simplify field installation.
4R/C & 8R/C Circular