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How Do Two Color Pyrometers Work?

How Do Two Color Pyrometers Work?. Two Color Pyrometers. Two Color Pyrometers. Two Color Pyrometer. Brightness Pyrometer. Two Color Pyrometers. Two Color Pyrometers. Two Color Pyrometers. Reduction Ratio Standard is 90% Specials to 99% Limited by Low Emissivity Object size

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How Do Two Color Pyrometers Work?

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  1. How Do Two Color Pyrometers Work?

  2. Two Color Pyrometers

  3. Two Color Pyrometers Two Color Pyrometer Brightness Pyrometer

  4. Two Color Pyrometers

  5. Two Color Pyrometers

  6. Two Color Pyrometers • Reduction Ratio • Standard is 90% • Specials to 99% • Limited by • Low Emissivity • Object size • Obstructions

  7. Two Color Pyrometers • E – Slope • Adjustable 0.85 to 1.15 • 1.0 is a graybody • Required for non-graybody targets • Required for non-graybody obstructions • Incorrect windows

  8. Two Color Pyrometers Reflection Errors

  9. Target Area Cone of Vision Two Color Pyrometers Cone of Vision

  10. Background (Variable Temperature) Our Target is 1000°C: 1 – 5 are our cone of vision

  11. Two Color Background Errors

  12. Two Color Pyrometers No Achromatic Lens (Wavelengths out of focus) Achromatic Lens (Wavelengths in focus)

  13. Two Color Pyrometers No Achromatic lens? The Pyrometer “sees” two images

  14. Detector Methods - Ircon Speed of response: Approx. 10 milliseconds

  15. Optical Mixer Ends Chopper Detector #1 Detector #2 Heater Two Detector Design Achromatic Lens Optical Mixer End Detector #1 Detector #2 Heater

  16. Detector Methods – Filter Wheel Speed of Response: Approx. 3 Seconds

  17. Steel •Slabs exiting Reheat Furnace •Coke from Furnace •Hot Strip Mill •Bar Mill •Rod Mill Glass •Gob Temperature •Melt Temperature •Glass Streams Metals •Molten Metals •Wire Drawing •Wire Annealing Heating •Induction Heaters •Vacuum Furnaces Applications for Two Color Pyrometers

  18. Conclusions? Thank you for attending!

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