Ultrasonic Flowmeters

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Ultrasonic Flowmeters

  1. 1. Ultrasonic Flow Measurement Principles & Introduction Series PUX2 Series UXF3 The materials included in this compilation are for the use of Dwyer Instruments, Inc. potential customers and current employees as a resource only. They may not be reproduced, published, or transmitted electronically for commercial purposes. Furthermore, the Company’s name, likeness, product names, and logos, included within these compilations Series UXF2 may not be used without specific, written prior permission from Dwyer Instruments, Inc. ©Copyright 2011 Dwyer Instruments, Inc.
  2. 2. Transit Time Measuring Principle • Clamp-on sensors Upstream Sensor Oscillator Wedge • Transit-time difference system Pipe • Principle equation: Q D θf 1 Q=─π D2 / 4 * ── * D/sin2θf * 1/(T0-τ)2 ΔT K Downstream τ/2 τ/2 Sensor T1 T2 • Q : Flow rate • T1, T2 : Transit time ΔT=T2-T1 • D : Inner pipe diameter • T0 : Transit time between sensors • K : Conversion factor when flow is at rest (Note) of average velocity (≒(T1+ T2 )/2) Ultrasonic waves are • θf: Incident angle into liquid • τ : Transit time in pipe walls and carried with the motion of sensors fluid.
  3. 3. Advanced ABM (Anti-bubble Measurement)  Utilized in Model PUX2, UXF3  Digital sampling of received signals increases flow reading reliability  Synchronized summation of received signals : - Normal propagation Received signal : flow v bubble t Digital data of Summed received signals : 128 or 256 v - Interrupted propagation times for one output t Received signal : flow v bubble t Nothing! In case of analog system no – signal, intermittent loss of receive echo
  4. 4. Result of Bubble Immersion Test 12 12 Permissible Air Volume 10 8 7.0 [vol. %] Models PUX2, UXF3 6 4.0 4 Model UXF2 1.5 2 1.2 0.4 0.03 1.0 0.02 1 0.02 1.0 2.0 3.0 4.0 5.0 Velocity [m/s] (Note) The flowmeters indicate volumetric flow rate containing air volume.
  5. 5. Sound Velocity Measurement System Upstream Sensor  Patented sound velocity compensation – all Pipe models Effect of temp./ pressure change  Changing process conditions (temp/pressure) D θf Q Sound change fluid sound velocity (changes results) Velocity Cf Downstream  Changing temp/pressure can be ignored if sound τ/2 τ/2 Sensor T1 velocity is constantly measured and compensated T2  Sound velocity compensation system tracks and adjusts “θ” and “τ” Successive calculation with sensors‘ spacing having no change from the set value
  6. 6. Model Specifications & Applications • 0.5” – 235” diameter, up to 12% air/solids • Digital fine filter & correlation • 12 hour battery, data logger, memory card & PUX2 printer (options) • 0.5” – 235” diameter, up to 12% air/solids • Digital fine filter & correlation UXF3 • Full featured, flexible I/O, IP65 enclosure • 1” – 24” diameter, up to 1.5% air/solids • Advanced transit time technology • Full featured, flexible I/O, highly competitive UXF2
  7. 7. PUX2 Specifications Dwyer Instruments PUX2 Measurement Method Transit Time Pipe sizes 0.50 to 236 inch diameter Number of Paths 1 path Fluid temperature -40 to +80℃/100℃/200℃ Ambient temperature -10 to +55℃ (Printer 45℃) Air bubble resistance 12 Vol% (at 1m/s) Accuracy +/-1.0% of rate Velocity range 0 to +/- 32m/s (105 fps) Output Analog Output: 1point 4-20mA; Heat Transfer Rate Function Input Analog Input: 1 point 4-20 mA Serial communication USB Port (Mini type B, 500kbps) Key 11 keys (ON, OFF, LEFT, RIGHT, UP, DOWN, ESC, ENT, MENU, BACKLIGHT, PRINT) Display 240 X 320 Color LCD Language 6 languages (ENG, ESP, GER, FRA, JAP, CHI) Power Supply Built-in battery or power adapter Built-in battery: L-Ion battery, approximately 12 hours Power adaptor: AC Power Adapter/Charger 90 to 264V Dimensions H210 x W120 x D65mm (without printer) H320 x W127 x D70mm (with printer) Mass: 1.0 kg (without printer) 1.2 kg (with printer) Type of Enclosure IP64 (Plastic)
  8. 8. UXF3 Specifications Dwyer Instruments UXF3 Measurement Method Transit Time Pipe sizes 0.50 to 235 inch diameter Number of Paths 1 path Fluid temperature -40 to +80℃/100℃/200℃ Ambient temperature -10 to +55℃ Air bubble resistance 12 Vol% (at 1m/s) Accuracy +/-1.0% of rate Velocity range 0 to +/- 32m/s (105 fps) Output One 4 to 20mA DC current output…Max. load resistance 1kΩ Input: 1 digital input, 1 pt. - No Voltage Digital status output: 2 points available - 30V DC, transistor switch; set zero/reset 0.1A…Total pulse, Flow switch, Over flow, Range totalizer change-over, Flow direction, Range over Mechanical relay: 1 pt available; 240VAC/30VDC-1 amp Serial communication RS232C/Modbus RS485 option; Baud rate: 9600 to 39400 bps; Distance: 15m(RS232)/1000m(RS485) max. Key 4 key keyboard; menu driven programming Display LCD with back light, 16 x 2 lines Language 5 languages (ENG, ESP, GER, FRA, JAP) Power Supply 100 to 240V AC 50/60Hz, or 20 to 30V DC Dimensions H170 x W142 x D70mm Type of Enclosure IP66 (1.5 kg)
  9. 9. UXF2 Specifications Dwyer Instruments UXF2 Measurement Method Transit Time Pipe sizes 1 to 24 inch (plastic pipe); 2 to 24 inch (metal) Number of Paths 1 path Fluid temperature -40 to +80℃/100℃ Ambient temperature -20 to +50℃ Air bubble resistance 1.2 Vol% (at 1m/s) Accuracy 2% of rate (>2m/s), 0.04m/s (<2m/s) Velocity range 0 to +/- 10 m/s (33 fps) Output 4 to 20mAdc, 1 point Digital output: Relay & transistor, each 1 point (scaled totalizer pulse, alarm, etc.) Scaled pulse: 1pulse/day to 100pps for transistor output 1pulse/day to 1pps for relay output Serial communication RS-232C equivalent / RS-485 Number of connectable units: one (RS-485)/ up to 31 (RS-485) Cable length: up to 15m (RS-232C)/up to 1km (RS-485) Key 4 key front panel keyboard; menu driven programming Display LCD 2 lines 32 characters - backlight Language 5 languages (incl. Spanish) Power Supply 20 to 30Vdc, 100 to 120Vac or 200 to 240Vac, 50/60Hz Dimensions Dimensions of converter: H140 x W137 x D68mm Mass of converter: approx, 0.8 kg Type of Enclosure IP65 (Plastic)
  10. 10. Sensor Mount & UXF2 Sensor Selection • “V” mount configuration • “Z” mount configuration • Typical setup; recommended for most cases • Single reflection reduces signal attenuation having sufficient return signal • Effective at upper end of sensor diameter range or • Sensors mounted axially on the same side specific circumstances to increase return signal Type Model No. Pipe size Fluid temp. SX3-A 1 4 in (V-mount) -20 +100℃ SX3-B 2 9 in (V) -20 +100℃ UXF2 SX3-C 2 12 in (V) -20 +80℃ SX3-D 12 24 in (Z) -20 +80℃
  11. 11. Sensor Selection PUX2, UXF3 Type Model No. Pipe size Fluid temp. PSX2-B 1/2 4 in (V-mount) -40 +100℃ 2 14 in (V) PSX2-A -40 +100℃ 12 16 in (Z) 2 14 in (V) +200℃ PSX2-HT -40 PUX2 12 16 in (Z) 2 16 in (V) PSX2-E 12 48 in (Z) -40 +80℃ 8 120 in (V) PSX2-D 8 236 in (Z) -40 +80℃ SX2-A 1/2 4 in (V-mount) -40 +100℃ (V 2 14 in ) SX1-A 12 16 in (Z) -40 +80℃ 2 14 in (V) +200℃ UXF3 SX2-B 12 16 in (Z) -40 2 24 in (V) SX1-B 12 48 in (Z) -40 +80℃ 8 120 in (V) SX1-C 8 236 in (Z) -40 +80℃
  12. 12. Accuracy – PUX2 & UXF3  Rated accuracy PUX2, UXF3 : Pipe diameter Velocity Accuracy Converter Sensor Φ0.5 in. 2 to 32 m/s 1.5% of rate to Φ 2 in. 0 to 2 m/s 0.03 m/s • PSX Φ2 in. to 2 to 32 m/s 1.0% of rate •PUX2 • SX1 Φ12 in. 0 to 2 m/s 0.02 m/s •UXF3 • SX2 Φ12 in.to 1 to 32 m/s 1.0% of rate Φ24 in. + 0 to 1 m/s 0.01 m/s  Reference conditions : +0.32 1. Fluid temp : Clean water 4 to 40℃ Accuracy [m/s] 2. Fluid pressure : Less than 1 MPa +0.02 +0.01 3. Flow : Full-filled, axisymmetric & well 0 1 2 32 developed turbulent flow -0.01 -0.02 Velocity 4. Warm-up time : 30 mins. -0.32
  13. 13. Accuracy – UXF2 UXF2 Rated Accuracy Plastic pipe Pipe diameter Velocity Accuracy Converter Sensor Φ1 in.to 2 to 10 m/s 2.5% of rate Φ2 in. 0 to 2 m/s 0.05 m/s • UXF2 • SX3-A/B • SX3-C/D Φ2 in. to 2 to 10 m/s 1.5% of rate Φ24 in. 0 to 2 m/s 0.03 m/s Metal pipe Pipe size Velocity Accuracy Converter Sensor Φ2 in.to 2 to 10 m/s 2% of rate • UXF2 • SX3-A/B Φ24 in 0 to 2 m/s 0.04 m/s • SX3-C/D
  14. 14. Getting Started – PUX2 Setting up the model PUX2 • Overview of functions
  15. 15. PUX2 Display & Screen navigation • Interface divided among 6 selections To enter the “menu” screen anytime, press the • Default view = “measure” screen (below) menu button 6 menu selections for setup, configuration, datalogger, printer, etc. appear
  16. 16. Getting Started – UXF3 Setting up the model UXF3 • Overview of functions
  17. 17. UXF3 – Inside the cover, wiring
  18. 18. UXF3 – Installation steps  Basic Installation steps  Additional Installation steps –Install Transmitter wiring and power –Install optional wiring –Locate appropriate mounting location –Analog output, totalizer, switch outputs –Set Inch or metric units –Program optional functions –Program piping parameters –AO range –Set main display preference & units –Totalizer –Install sensor set on pipe –Flow switch/alarms –Verify signal and reading –Low flow cutoff –Damping –Record system parameters  4 key operation  Green/Red LED indicator on front panel
  19. 19. Getting Started – – UXF2 Getting Started UXF1 Setting up the model UXF2 •Overview of functions - 19 -
  20. 20. UXF2 – Primary components - inside  Primary components & Functions  Key input via front panel  Modular 2 or 3 boards design –Signal (bottom) –Power supply (left top)Install Transmitter wiring and power –Serial comms (top right-optional)  Front Panel LED –Red/Green LED provides signal Normal or error condition
  21. 21. UXF2 – Installation steps jumper  Basic Installation steps –Install Transmitter wiring and power –Locate appropriate mounting location –Set Inch or metric units –Program piping parameters –Set main display preference & units –Install sensor set on pipe –Verify signal and reading –Recommend Hardcopy of Manual Pages 40-42  Additional Installation steps –Install optional wiring –Analog output, totalizer, switch outputs –Program optional functions –AO range –Totalizer –Flow switch/alarms –Low flow cutoff –Damping –Record system parameters
  22. 22. Markets & Applications • PUX2 and UXF3 – Wastewater flow monitoring in wastewater treatment systems and plants – Water flow monitoring at water treatment plants • UXF2 – Semiconductor – water flow monitoring – Building Automation Systems • Hot and cold water flow from chillers and boilers • PUX2 – Building Automation Systems • BTU Calculations • In general good for flow monitoring when selling on the advantage of not having to cut open the pipe for installation and also for repair work
  23. 23. Markets & Applications – PUX2 as an Energy Meter for BAS
  24. 24. Markets & Applications – PUX2 Installation
  25. 25. QuestionsTo order a free catalog or for more information contact; Dwyer Instruments, Inc., P.O. Box 373, Michigan City, IN., 46361 Telephone: (800) 872-9141 or (219) 879-8000 Fax: (219) 872-9057 Internet address: www.dwyer-inst.com E-mail: info@dwyer-inst.com

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