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Update on #40 Vibratory Mode

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Discussion about #40 vibratory mode and identifying suspect anemometers

62 topics in this forum

  1. I have question about temperature

    By violet94,
    • 0 replies
    • 133 views

  2. Updates to identification of dry friction whip

    By tsmoker,
    • 1 reply
    • 15,759 views

  3. Vibratory Mode Anemometer Replacement

    By fabianb,
    • 6 replies
    • 15,766 views

  4. Link to slides from last webinar presentation

    By ColinMurray,
    • 2 replies
    • 11,025 views

  5. Replacement of unused sensors

    By Michael,
    • 2 replies
    • 10,678 views

  6. AWEA Windpower 2009 Presentation "Investigation of the NRG #40 Anemometer Slowdown"

    By Julia Austin,
    • 5 replies
    • 17,248 views

  7. NRG #40 anemometers

    By Steve_Heidra,
    • 2 replies
    • 10,653 views

  8. Could you elaborate on recommendations for how to use data from masts with corrupted sensors?

    By Julia Austin,
    • 2 replies
    • 10,756 views

  9. Can NRG specify by serial number which sensors can enter the vibratory mode? How do we determine if sensors delivered are within the problem batch(es)?

    By Julia Austin,
    • 4 replies
    • 16,794 views

  10. vibration problem in #40 anemometer

    By techfe,
    • 1 reply
    • 9,391 views

  11. White Paper: "Investigation of the NRG #40 Anemometer Slowdown" by Steven H. Clark

    By Julia Austin,
    • 0 replies
    • 10,472 views

  12. what is vibratory mode?

    By ROHAN JADHAV,
    • 1 reply
    • 10,772 views

  13. Update on #40C Sensor Shipments

    By ltj,
    • 10 replies
    • 29,065 views

  14. Icefree3 sensors

    By GemmaAllen,
    • 1 reply
    • 9,164 views

  15. Does NRG plan to develop any tools that will aid in identifying and cleaning these areas of bad data?

    By Julia Austin,
    • 0 replies
    • 7,849 views

  16. What is the expected timing for recommendations/conclusions on how to fully identify/correct problems with sensor drag?

    By Julia Austin,
    • 0 replies
    • 7,408 views

  17. What is the magnitude of additional uncertainty that a dragging sensor is estimated to cause (%)?

    By Julia Austin,
    • 0 replies
    • 8,618 views

  18. Is there a standard uncertainty value that will be added, and has this been quantified by GH, AWS, or DNV-GEC?

    By Julia Austin,
    • 0 replies
    • 8,128 views

  19. Can we get a transcript and copy of this presentation?

    By Julia Austin,
    • 0 replies
    • 7,005 views

  20. What are the criteria for replacing an instrument? Will NRG liberally replace any sensor showing signs of this problem in 10-minute data, even if your post-calibration tests do not excite the vibration mode in the sensor?

    By Julia Austin,
    • 0 replies
    • 7,613 views

  21. What is the magnitude of any planned cost increase per sensor for a 'revised' sensor?

    By Julia Austin,
    • 0 replies
    • 7,126 views

  22. What is your recommendation on parallel installs other manufacturers' sensors alongside the 40C to compare the data (i.e. at what height and direction to install new, third party sensors)?

    By Julia Austin,
    • 0 replies
    • 6,044 views

  23. Do you have an estimated timeline for when field testing and reengineering [sic] will be complete?

    By Julia Austin,
    • 0 replies
    • 6,418 views

  24. Has this problem been seen on both tubular and lattice towers? Also, has this problem been seen on varying boom lengths/types?

    By Julia Austin,
    • 0 replies
    • 3,707 views

  25. Could this problem be found in the non-calibrated #40 anemometers?

    By Julia Austin,
    • 0 replies
    • 3,941 views
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