Clark Solutions
CSLFC Liquid Ultrasonic Flow Transmitters
Loop Powered 4-20 mA Output, Flows to 3000 GPM, 4" to 10" Pipe, Carbon Steel
DESCRIPTION
ClarkSonic 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 180°F
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
Pipe Sizes: 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
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: Schedule 40, epoxy coated, carbon steel pipe
OUTPUT
Analog: 2-wire, 4-20 mA output; Output is 4 mA from zero to min. flow
(see Standard Model table)
Error Detection: An optically isolated 10 mA (max. 48V no load voltage) 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.
Direction of Flow: Optional output to indicate direction of flow is available.
Activation or deactivation of an optically isolated 10 mA (max. 48V no load voltage)
sink output indicates flow direction. Error detection is not available when this
option is ordered.
|
Pipe Size |
Dimensions (Inches) |
|
A |
B |
C |
D |
E |
F |
Bolt Circle Diameter |
Number of Holes |
|
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 |
STANDARD MODELS
|
Model |
Pipe Size |
*Field Selectable Full Scale Ranges (GPM) Min. Max
|
*Field Selectable Full Scale Ranges (LPM) Min. Max
|
|
CSLFC4 |
4" |
L |
6.25 |
500 |
25 |
2000 |
|
H |
12.5 |
1000 |
50 |
4000 |
|
CSLFC6 |
6" |
L |
12.5 |
1000 |
50 |
4000 |
|
H |
25 |
2000 |
94 |
7500 |
|
CSLFC8 |
8" |
L |
25 |
2000 |
94 |
7500 |
|
H |
50 |
4000 |
188 |
15000 |
|
CSLFC10 |
10" |
|
37.5 |
3000 |
138 |
11500 |
|
*Other F.S. ranges can be specified |
ORDERING INFORMATION
ORDER NUMBER (ABCD)
Example: CSLFC10GB
| PLEASE CALL 1-800-253-2497 TO ORDER THESE ITEMS |
| A |
B |
C |
|
Model |
Units of Measure |
Transducer Seal
|
|
CSLFC4 |
G= Gallons Per Minute (U.S.) |
E = EPDM |
|
CSLFC6 |
L= Liters Per Minute |
B = Buna-N |
|
CSLFC8 |
|
N= Neoprene® |
|
CSLFC10 |
V= FKM |
| |
|
Options |
|
DF= Direction of flow output
option |
| |
|
*For non-listed ranges specify
model followed by full span value |
|
Example: CSLFC4-300G = 300 GPM
at 20 mA or CSLFC4-750L=750LPM @ 20 mA |
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.
