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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
    • 168 views

  2. Updates to identification of dry friction whip

    By tsmoker,
    • 1 reply
    • 15,783 views

  3. Vibratory Mode Anemometer Replacement

    By fabianb,
    • 6 replies
    • 15,793 views

  4. Link to slides from last webinar presentation

    By ColinMurray,
    • 2 replies
    • 11,044 views

  5. Replacement of unused sensors

    By Michael,
    • 2 replies
    • 10,689 views

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

    By Julia Austin,
    • 5 replies
    • 17,295 views

  7. NRG #40 anemometers

    By Steve_Heidra,
    • 2 replies
    • 10,675 views

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

    By Julia Austin,
    • 2 replies
    • 10,777 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,
    • 3 replies
    • 16,835 views

  10. vibration problem in #40 anemometer

    By techfe,
    • 1 reply
    • 9,414 views

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

    By Julia Austin,
    • 0 replies
    • 10,495 views

  12. what is vibratory mode?

    By ROHAN JADHAV,
    • 1 reply
    • 10,796 views

  13. Update on #40C Sensor Shipments

    By ltj,
    • 10 replies
    • 29,104 views

  14. Icefree3 sensors

    By GemmaAllen,
    • 1 reply
    • 9,190 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
    • 7,864 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
    • 7,425 views

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

    By Julia Austin,
    • 0 replies
    • 8,639 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
    • 8,144 views

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

    By Julia Austin,
    • 0 replies
    • 7,027 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
    • 7,632 views

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

    By Julia Austin,
    • 0 replies
    • 7,145 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
    • 6,064 views

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

    By Julia Austin,
    • 0 replies
    • 6,436 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
    • 3,729 views

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

    By Julia Austin,
    • 0 replies
    • 3,963 views
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