Ultrasonic Flow Meter Model CSLFB

4-20 mA Output, Frequency Output, Flows to 120 GPM, 3/4" to 2" Pipe, Brass

DESCRIPTION

Clark Sonic^® CSLFB Ultrasonic Flow Meters 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 CSLFB flow meter/flow 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 CSLFB ultrasonic flow meter 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 Brass body material.

SPECIFICATIONS
GENERAL

Flow Range: Bi-directional, field selectable per "Standard Models" table
Accuracy: ±.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: 250 PSI (17.2 bars)
Pipe Sizes: 3/4", 1", 1 1/2", 2"
Pipe Connections:
    Sizes 3/4" to 2"- Female NPT, BSP
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 or optional factory installed connectors
Enclosure Rating: NEMA 4 (IP 65)
Power: 18 to 36 VDC

WETTED MATERIALS

Ultrasonic Transducers: ULTEM® Encapsulated
Seals: EPDM, Buna-N, Neoprene™, FKM, or other
Body Material: Brass (UNS C83600)

OUTPUT

Analog: 2-wire, 4-20 mA output; Output is 4 mA from zero to min. flow 
    (see Standard Model table)
Additional Outputs: A second output is available in the form of an optically 
isolated NPN transistor. The second output is configured at the factory. 
The configuration choices are:
	Error Detection: An optically isolated sink output is activated under 
   	certain detectable fault conditions, such as transducer failure or 
   	overly noisy output due to flow stream anomalies, as might be seen 
   	due to excessive bubble entrainment. The optional Fault 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 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 240 to 1200 pulses/gallon depending on 
        range (see Standard Model table). Lower frequency can be provided on request.  
	Direction of Flow: Optional output to indicate direction of flow is 
   	available. Activation or deactivation of an optically isolated 25 mA 
   	sink output indicates flow direction. Error detection is not available 
   	when this option is ordered.
Optional Temperature Sensor: 3 wire RTD, 100 Ohm, Platinum, Class A, 
  IEC60751, built in to transducer shell for monitoring process temperature; 
  optional 4 or 8 pin electrical connector recommended with this option.

	
	
	

Size/Connection	A		B		C		D		E
	Inches	mm	Inches	mm	Inches	mm	Inches	mm	Inches	mm
3/4" & 1"	9.20	234	1.62	41.10	2.06	52.30	6.40	163	2.40	61.00
1-1/2" & 2"	9.88	251	2.75	69.90	2.51	63.80	6.40	163	2.40	61.00

STANDARD MODELS

Model	Pipe Size and Thread Size		*Field Selectable Full Scale Ranges (GPM)		*Field Selectable Full Scale Ranges (LPM)		Frequency Output Option	Flow Constant (Gallons)	Frequency Output Option	Flow Constant (Liters)
			Min.	Max.	Min.	Max.	Pulses/Gallon	Gal/Min=FC*Freq.	Pulses/Liter	L/Min=FC*Freq.
CSLFB34	3/4” NPT or BSP	L	0.23	15	0.90	60	1200	0.25	300	0.2
		H	0.38	25	1.50	100
CSLFB10	1.0” NPT or BSP	L	0.45	30	1.70	115	600	0.1	150	0.4
		H	0.75	50	3.00	200
CSLFB15	1.50” NPT or BSP	L	0.60	40	2.30	150	360	0.167	96	0.625
		H	1.20	80	4.50	300
CSLFB20	2.0” NPT or BSP	L	0.90	60	3.40	225	240	0.25	60	1
		H	1.80	120	6.80	455
*Other F.S. ranges can be specified

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

WIRING

2-WIRE, 4-20 MA LOOP

FREQUENCY/PULSE OUTPUT

The opto-isolated NPN transistor that generates the square wave pulse output is limited to 25 mA when conducting and to 48 volts when non-conducting

ORDERING INFORMATION

ORDER NUMBER (ABCDEF)
Example: CSLFB10NPTGEF4H

FOR YOUR CONVENIENCE, THESE ITEMS ARE AVAILABLE ONLINE OR PLEASE CALL 1-800-253-2497 TO ORDER
*A	B	C	D
Model	Pipe Thread	Units of Measure	Transducer Seal
CSLFB34	NPT= Female NPT	G= Gallons Per Minute (U.S.)	E= EPDM
CSLFB10	BSP=Female British Standard Pipe (G)	L= Liters Per Minute	B= Buna-N
CSLFB15			N= Neoprene¨
CSLFB20			V= FKM
E - Options
NPN Transistor Output - Select One
- = Error Detection (Default)
F = Frequency Output
DF = Direction of flow output option
Other Options
R=100 Ohm Platinum RTD
DP=Display % F.S
DS=Display in Engineering Units- specify
F - Transmitter Connector Options
- = 1/2” NPTF (Default)
4H=Hirschmann 4-conductor Receptacle & 1/2” NPTF Conduit Connector Set
4R= 4-Pin Male Circular Receptacle
8R= 8-Pin Male Circular Receptacle
4C= 4-Pin Female Circular Connector
8C= 8-Pin Female Circular Connector
*For non-listed ranges specify model followed by full span value.  Example: CSLFB15-50G = 50 GPM at 20 mA or CSLFB15-200L=200LPM @ 20 mA

Qty: CSLFB10BSPGB $688.00 CSLFB10BSPGE $688.00 CSLFB10BSPGN $688.00 CSLFB10BSPGV $688.00 CSLFB10BSPLB $688.00 CSLFB10BSPLE $688.00 CSLFB10BSPLN $688.00 CSLFB10BSPLV $688.00 CSLFB10NPTGB $688.00 CSLFB10NPTGE $688.00 CSLFB10NPTGN $688.00 CSLFB10NPTGV $688.00 CSLFB10NPTLB $688.00 CSLFB10NPTLE $688.00 CSLFB10NPTLN $688.00 CSLFB10NPTLV $688.00 CSLFB15BSPGB $780.00 CSLFB15BSPGE $780.00 CSLFB15BSPGN $780.00 CSLFB15BSPGV $780.00 CSLFB15BSPLB $780.00 CSLFB15BSPLE $780.00 CSLFB15BSPLN $780.00 CSLFB15BSPLV $780.00 CSLFB15NPTGB $780.00 CSLFB15NPTGE $780.00 CSLFB15NPTGN $780.00 CSLFB15NPTGV $780.00 CSLFB15NPTLB $780.00 CSLFB15NPTLE $780.00 CSLFB15NPTLN $780.00 CSLFB15NPTLV $780.00 CSLFB20BSPGB $780.00 CSLFB20BSPGE $780.00 CSLFB20BSPGN $780.00 CSLFB20BSPGV $780.00 CSLFB20BSPLB $780.00 CSLFB20BSPLE $780.00 CSLFB20BSPLN $780.00 CSLFB20BSPLV $780.00 CSLFB20NPTGB $780.00 CSLFB20NPTGE $780.00 CSLFB20NPTGN $780.00 CSLFB20NPTGV $780.00 CSLFB20NPTLB $780.00 CSLFB20NPTLE $780.00 CSLFB20NPTLN $780.00 CSLFB20NPTLV $780.00 CSLFB34BSPGB $688.00 CSLFB34BSPGE $688.00 CSLFB34BSPGN $688.00 CSLFB34BSPGV $688.00 CSLFB34BSPLB $688.00 CSLFB34BSPLE $688.00 CSLFB34BSPLN $688.00 CSLFB34BSPLV $688.00 CSLFB34NPTGB $688.00 CSLFB34NPTGE $688.00 CSLFB34NPTGN $688.00 CSLFB34NPTGV $688.00 CSLFB34NPTLB $688.00 CSLFB34NPTLE $688.00 CSLFB34NPTLN $688.00 CSLFB34NPTLV $688.00 Show Discount Schedule

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.