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WMP-125-1  Level sensing in harsh environments with guided-wave radar ABB Automation & Power World: April 18-21, 2011 © AB...
WMP-125-1   Level sensing in harsh environments with guided-wave radar <ul><li>Speaker name: Charles Richard </li></ul><ul...
Level sensing in harsh environments with GWR Agenda <ul><li>Today’s common level measurement technologies </li></ul><ul><l...
<ul><li>Differential Pressure </li></ul><ul><li>Capacitance </li></ul><ul><li>Ultrasonic </li></ul><ul><li>Non-Contact Rad...
<ul><ul><li>Hydrostatic measurement has been around for a very long time </li></ul></ul><ul><ul><li>Easy to calibrate </li...
<ul><ul><li>Inexpensive total cost of ownership </li></ul></ul><ul><ul><li>Works on most conductive fluids </li></ul></ul>...
<ul><ul><li>Non-contact measurement </li></ul></ul><ul><ul><li>Can be applied in liquids and solids applications </li></ul...
<ul><ul><li>Non-contact measurement </li></ul></ul><ul><ul><li>Can be applied in liquids and solids applications </li></ul...
<ul><ul><li>Can be applied in liquids and solids applications </li></ul></ul><ul><ul><li>Unaffected by changes in pressure...
Applications Not all are the same <ul><li>Changing product densities </li></ul><ul><li>Changing pressures or temperatures ...
<ul><li>Differential Pressure </li></ul><ul><ul><li>Susceptible to changes in specific gravity </li></ul></ul><ul><ul><li>...
Principle of Operation <ul><li>Distance is determined by measuring the time it takes for a signal pulse to be emitted and ...
<ul><ul><li>specific gravity </li></ul></ul><ul><ul><li>ambient and process temperatures </li></ul></ul><ul><ul><li>diaphr...
Troublesome Application Examples
Troublesome Application Examples Solids vessels
Guided-Wave Radar  Time domain reflectometry <ul><li>Slide  </li></ul>Guided micro-impulses with advantage of a more focus...
Troublesome Application Examples Horizontal cylinders and false reflections © ABB Inc.  May 31, 2011  | Slide
Troublesome Applications © ABB Inc.  May 31, 2011  | Slide
Troublesome Applications Tank Obstructions and Surface Conditions © ABB Inc.  May 31, 2011  | Slide
Troublesome Applications Tank Obstructions and Surface Conditions © ABB Inc.  May 31, 2011  | Slide
Troublesome Applications Tank Obstructions  © ABB Inc.  May 31, 2011  | Slide
© ABB Group  May 31, 2011  | Slide
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Level sensing in harsh environments with GWR

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Level Sensing in Harsh Environments with Guided-Wave Radar -- by Charles Richard, Radar Product Manager, K-TEK, A Member of the ABB Group

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Level sensing in harsh environments with GWR

  1. 1. WMP-125-1 Level sensing in harsh environments with guided-wave radar ABB Automation & Power World: April 18-21, 2011 © ABB Inc. May 31, 2011 | Slide
  2. 2. WMP-125-1 Level sensing in harsh environments with guided-wave radar <ul><li>Speaker name: Charles Richard </li></ul><ul><li>Speaker title: Product Manager – Radar Products </li></ul><ul><li>Company name: K-TEK, A Member of the ABB Group </li></ul><ul><li>Location: Prairieville, LA </li></ul>© ABB Inc. May 31, 2011 | Slide
  3. 3. Level sensing in harsh environments with GWR Agenda <ul><li>Today’s common level measurement technologies </li></ul><ul><li>Troublesome installation and applications </li></ul><ul><li>How guided-wave radar solves level problems </li></ul><ul><li>Why GWR has better reliability </li></ul><ul><li>Applications to avoid with GWR </li></ul><ul><li>Conclusions </li></ul>© ABB Inc. May 31, 2011 | Slide
  4. 4. <ul><li>Differential Pressure </li></ul><ul><li>Capacitance </li></ul><ul><li>Ultrasonic </li></ul><ul><li>Non-Contact Radar </li></ul><ul><li>Guided-Wave Radar </li></ul>© ABB Inc. May 31, 2011 | Slide Level sensing in harsh environments with GWR Today’s common level measurement technologies
  5. 5. <ul><ul><li>Hydrostatic measurement has been around for a very long time </li></ul></ul><ul><ul><li>Easy to calibrate </li></ul></ul><ul><ul><li>Rarely questioned as a level solution </li></ul></ul><ul><ul><li>Can be serviced when tank is in service </li></ul></ul><ul><ul><li>Dependable technology if process conditions are stable </li></ul></ul>© ABB Inc. May 31, 2011 | Slide Today’s Common Level Measurement Technologies Differential pressure <ul><ul><li>Susceptible to changes in specific gravity </li></ul></ul><ul><ul><li>Susceptible to changes in ambient and process temperatures </li></ul></ul><ul><ul><li>Susceptible to diaphragm coating, abrasion, and wear </li></ul></ul><ul><ul><li>Damage and coating on diaphragm causes failure or erroneous readings </li></ul></ul><ul><ul><li>Expensive installation and total cost of ownership </li></ul></ul><ul><ul><li>Requires routine tuning and maintenance </li></ul></ul><ul><ul><li>Liquid applications only </li></ul></ul>
  6. 6. <ul><ul><li>Inexpensive total cost of ownership </li></ul></ul><ul><ul><li>Works on most conductive fluids </li></ul></ul><ul><ul><li>Dependable technology if process conditions are stable </li></ul></ul>© ABB Inc. May 31, 2011 | Slide <ul><ul><li>Difficult to calibrate </li></ul></ul><ul><ul><li>Dielectric changes cause shifts in measurement </li></ul></ul><ul><ul><li>Coating causes shifts in measurement </li></ul></ul><ul><ul><li>Installation greatly affects measurement dependability </li></ul></ul><ul><ul><li>Damage to coated probe causes failure </li></ul></ul><ul><ul><li>Mounting in non-metallic vessels requires ground chain </li></ul></ul><ul><ul><li>Over-applied when technology hit market </li></ul></ul>Today’s Common Level Measurement Technologies Capacitance
  7. 7. <ul><ul><li>Non-contact measurement </li></ul></ul><ul><ul><li>Can be applied in liquids and solids applications </li></ul></ul><ul><ul><li>Inexpensive </li></ul></ul><ul><ul><li>Can be applied in tall vessels </li></ul></ul><ul><ul><li>Dependable if applied correctly </li></ul></ul>© ABB Inc. May 31, 2011 | Slide <ul><ul><li>Susceptible to changes in process temperatures and pressures </li></ul></ul><ul><ul><li>Limited process temperature capabilities </li></ul></ul><ul><ul><li>Susceptible to foam or light powder (fluidized) surfaces </li></ul></ul><ul><ul><li>Susceptible to dust or gas layering </li></ul></ul><ul><ul><li>Mounting can affect performance </li></ul></ul><ul><ul><li>Susceptible to condensate and coating on transducer </li></ul></ul><ul><ul><li>Susceptible to false reflections from tank shape and internal obstructions </li></ul></ul><ul><ul><li>Susceptible to changes in angle of repose in bulk solids applications </li></ul></ul><ul><ul><li>Typically a 4 wire device </li></ul></ul><ul><ul><li>Over-applied when technology was first introduced </li></ul></ul>Today’s Common Level Measurement Technologies Ultrasonic
  8. 8. <ul><ul><li>Non-contact measurement </li></ul></ul><ul><ul><li>Can be applied in liquids and solids applications </li></ul></ul><ul><ul><li>Unaffected by changes in temperature, pressure, density </li></ul></ul><ul><ul><li>Flexible application capabilities </li></ul></ul><ul><ul><li>Dependable if applied correctly </li></ul></ul>© ABB Inc. May 31, 2011 | Slide <ul><ul><li>Mounting can affect performance </li></ul></ul><ul><ul><li>Susceptible to foam or light powder (fluidized) surfaces </li></ul></ul><ul><ul><li>Susceptible to dust </li></ul></ul><ul><ul><li>Susceptible to condensate and coating on antenna </li></ul></ul><ul><ul><li>Susceptible to changes in dielectric </li></ul></ul><ul><ul><li>Susceptible to false reflections from tank shape and internal obstructions </li></ul></ul><ul><ul><li>Susceptible to changes in angle of repose in bulk solids applications </li></ul></ul>Today’s Common Level Measurement Technologies Non-contact radar
  9. 9. <ul><ul><li>Can be applied in liquids and solids applications </li></ul></ul><ul><ul><li>Unaffected by changes in pressure, temperature, density </li></ul></ul><ul><ul><li>Unaffected by turbulence </li></ul></ul><ul><ul><li>Virtually unaffected by foam </li></ul></ul><ul><ul><li>Virtually unaffected by changes in dielectric constant </li></ul></ul><ul><ul><li>Very flexible application capabilities </li></ul></ul><ul><ul><li>Dependable if applied correctly </li></ul></ul>© ABB Inc. May 31, 2011 | Slide <ul><ul><li>Susceptible to heavy high dielectric coating on probe </li></ul></ul><ul><ul><li>Mounting can affect performance </li></ul></ul><ul><ul><li>Cable subject to wear in highly abrasive solids </li></ul></ul><ul><ul><li>Contact technology </li></ul></ul>Today’s Common Level Measurement Technologies Guided-wave radar
  10. 10. Applications Not all are the same <ul><li>Changing product densities </li></ul><ul><li>Changing pressures or temperatures </li></ul><ul><li>Gas layering in the vessel fill stream </li></ul><ul><li>Agitation & turbulence </li></ul><ul><li>Coating or scaling </li></ul>© ABB Inc. May 31, 2011 | Slide All of these technologies are viable level solutions All can perform in stable applications <ul><li>Internal obstructions </li></ul><ul><li>Vessel geometry </li></ul><ul><li>Foam </li></ul><ul><li>Dust </li></ul><ul><li>Changes in angle of repose </li></ul>Maintenance Cost, Reliability and Total Cost of Ownership
  11. 11. <ul><li>Differential Pressure </li></ul><ul><ul><li>Susceptible to changes in specific gravity </li></ul></ul><ul><ul><li>Susceptible to changes in ambient and process temperatures </li></ul></ul><ul><ul><li>Susceptible to diaphragm coating, abrasion, and wear </li></ul></ul><ul><ul><li>Expensive installation and total cost of ownership </li></ul></ul><ul><ul><li>Requires routine tuning and maintenance </li></ul></ul><ul><ul><li>Liquid applications only </li></ul></ul><ul><ul><li>Hydrostatic measurement has been around for a very long time </li></ul></ul><ul><ul><li>Easy to calibrate </li></ul></ul><ul><ul><li>Rarely questioned as a level solution </li></ul></ul><ul><ul><li>Can be serviced when tank is in service </li></ul></ul><ul><ul><li>Dependable technology if process conditions are stable </li></ul></ul>© ABB Inc. May 31, 2011 | Slide Level sensing in harsh environments with GWR Today’s Common Level Measurement Technologies
  12. 12. Principle of Operation <ul><li>Distance is determined by measuring the time it takes for a signal pulse to be emitted and received by the transmitter. </li></ul>64,000 Pulses / second 2 readings per second Return Pulse (at speed Of Light) Signal Pulse (at speed Of Light) Time Of Flight <ul><li>Where: </li></ul><ul><li>D - is distance </li></ul><ul><li>C - is the speed of Light </li></ul>00.32 2 D = C
  13. 13. <ul><ul><li>specific gravity </li></ul></ul><ul><ul><li>ambient and process temperatures </li></ul></ul><ul><ul><li>diaphragm coating, abrasion, and wear </li></ul></ul><ul><ul><li>Expensive installation </li></ul></ul><ul><ul><li>routine tuning and maintenance </li></ul></ul>Troublesome Application Examples
  14. 14. Troublesome Application Examples
  15. 15. Troublesome Application Examples Solids vessels
  16. 16. Guided-Wave Radar Time domain reflectometry <ul><li>Slide </li></ul>Guided micro-impulses with advantage of a more focused energy <ul><li>Better reflection characteristics </li></ul><ul><li>Risk of side reflections </li></ul>80% of the energy is concentrated within a radius of 8”/ 20cm 8” 20cm
  17. 17. Troublesome Application Examples Horizontal cylinders and false reflections © ABB Inc. May 31, 2011 | Slide
  18. 18. Troublesome Applications © ABB Inc. May 31, 2011 | Slide
  19. 19. Troublesome Applications Tank Obstructions and Surface Conditions © ABB Inc. May 31, 2011 | Slide
  20. 20. Troublesome Applications Tank Obstructions and Surface Conditions © ABB Inc. May 31, 2011 | Slide
  21. 21. Troublesome Applications Tank Obstructions © ABB Inc. May 31, 2011 | Slide
  22. 22. © ABB Group May 31, 2011 | Slide

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