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Julia Austin

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Everything posted by Julia Austin

  1. Hello - 92000 is the last sensor serial number potentially affected by vibratory mode. Anything 95000 or higher is not affected, nor anything with serial number 26130 or below.
  2. The vibratory mode is not present in #40Cs shipped after January 1, 2009. We are glad to replace any #40C sensors still covered by our standard 2-year warranty, installed or uninstalled, regardless of whether or not vibratory mode is present. Please let us know how many sensors you have, their serial numbers, and whether or not they were installed, and we'll replace them at no charge. In most cases, we will ask that the anemometers are returned to NRG but if this is not possible, there are other options. Contact NRGTech Support (support@nrgsystems.com), and we will assist you with getting new #40Cs.
  3. Xxxxxxxxxxlog is incorrect for a "configuration patch"; what you paste into the Subject line and into the body of the email should be a 10 digit number only. To that email message, you attach the patch file, which has a .ptc extension. More detailed instructions on patch files can be found here: http://forum.nrgsystems.com/forums/t/10.aspx When you do a "sensor patch", the patch file will have a format of xxxxxxxxxxlog.ptc; however, what you past into the Subject line and into the body of the email should only be a 10 digit number (no "log" and without a file extension).
  4. You can use a customized export from SDR to obtain logger internal temperature and voltage data. The first step is to make sure you've got a recent version of SDR (6.0 or above). Please contact me, and I can send you a customized *.nef that provides internal temperature and logger voltage. Once you have the customized *.nef, here's what you do: Copy the *.nef files to the SYMDR folder (your version of SDR may in fact already have the withvt.nef in there). On my computer, the path is C:/NRG/SYMDR, so if you've got a NRG folder, look in there. Start SDR as usual, and then go to Site, View Database, and click the Export button as usual. Choose the date range, and when the 'save as' dialogue window pops up, choose your customized *.nef.
  5. Q: Is the Minimum wind speed for TIs of 4.5 m/s shown in SDR's "Editing Wind Rose" screen a default value? If so, can it be changed? A: Yes, 4.5 m/s is the default lower limit in SDR. While it is possible to change the mimimum value, raising it could skew TI (turbulence intensity) calculations (i.e. if you only calculate TIs based on higher wind speeds, there may be higher average TI values, but in fewer directions because some of the data will be eliminated from the TI calculations). Lowering the limit is not recommended because below 4.5 m/s is close to the threshold speed for wind turbines. While the lower range of wind speeds is not of much interest for wind energy measurements, eliminating them could artificially inflate the overall TI averages, which are very important in choosing an appropriate wind turbine.
  6. Stefano - are the anemometers you are comparing both #40C anemometers? it sounds as though there may be a problem with the scale factors. Can you send us some raw (*.rwd) files to review? I'd like to try to duplicate the problem you are seeing and find the solution. Thanks!
  7. The 9200-PLUS logger has no real-time output capabilities. It is designed for logging time-series data at a remote site. While instantaneous wind speed and direction can be viewed on the logger's display, there is no way to output this instantaneous data.
  8. Hello - can you send me some of the raw files you are trying to export? I want to try to duplicate the problem here. Please send to jma@nrgsystems.com Thanks! Julia
  9. Sorry you encountered this problem. Can you send me some *.rwd raw data files to review? We may be able to identify the source of the problem after seeing the files. Was an iPack transmitting the data files, or were the files collected manually? Thanks - Julia jma@nrgsystems.com
  10. Hi, Mike - the units of measure used in the reports are determined by what units of measure (in SDR's Site Information Editor window) were used to convert the raw data files when they were imported into the database. If you prefer MPH, go into the Site Information Editor window to scroll through all your sensor channels, change the units of measure by using the "Load Defaults" button and choosing "#40 Anem MPH" from the drop-down menu, and then go to File and choose "Save Site". Then re-import all of your data files - the data in the database will remain in m/s until you re-import. Let us know if you run into any problems and we'll do our best to help.
  11. Are you trying to connect with a serial cable or an AT MODEM cable? The iPack must be connected using an AT MODEM cable. However, it sounds like you should probably give us a call for assistance with the rest of this. You will need to actually open up the iPack in order to change the SIM card. Please give us a call, and we'll be happy to help you. Thanks!
  12. You will need to analyze several months of data ? at least 4 ? 8 months, ideally ? in order to detect a potential problem. You?ll need to compare wind speed data from pairs of sensors at the same height on the tower, excluding any wind speed data potentially affected by tower shadowing or shadowing due to nearby structures and/or terrain features. Your best bet may be to contact which ever consulting company you normally work with for data analysis as they have the expertise in scrutinizing the data at this level of detail. They are likely already familiar with the problem and how to find it in the data, and they may also be able to provide some recommendations about how to treat any potentially affected data. When we have been looking at our research data, we were sorting data from redundant, same height, un-shadowed sensors as follows: Mean Bias: 0.2 Ratio: 1.02 Ratio SD: > 0.02 R Value: However, this is not based on some established standard, nor are we advocating these as appropriate criteria for any and all data sets. These criteria, for example, do not take into consideration the effects of complex terrain. Unfortunately the nature of this problem and the vast variation among sites makes it very difficult to recommend a standard way of dealing with the data. I hope this helps.
  13. Ideally, a CDMA iPack using a Telus account would be intialized automatically using NRG's SDR software, and during the intialization process, the iPack's phone modem would obtain the PRL (PreferredRoaming List). Unfortunately, many customers have not been able to do the standard intialization process successfully due a Telus cellular network issue. Following is a workaround using the hidden Phone Diagnose window in SDR: To use the Phone Diagnose window, you will need to do thefollowing: 1. Open up SDR (Symphonie Data Retriever) on your PC. 2. Type nrgphone on your keyboard (you do not need to enter this in any field - just type it into blank space). 3. A dialog box will come up entitled Phone Diagnose - click on the CDMA tab. 4. You will click the buttons on this screen from left to right starting with Get DIR, then Unlock SPC, Go Offline, Set DIR. 5. When Set DIR is clicked, you will need to enter the 10 digit Verizon phone number is this field with no spaces. Click OK. 6. Click Reset Mode, then Reset. *This method of phone initialization does not upload the PRL of the cellular provider. If this did not work, you will still receive one of thefollowing error messages: ? 072 - No carrier modem response. ? 075 - Access denied to internet server. ? 001 - Cannot make call. If you receive an error message, and everything is correctlysetup within the *.ipk file, contact NRG Tech Support for assistance.
  14. On August 29, 2009, Verizon Wireless will be shutting down their SMTP server smtp.vzwmail.net. This will affect any iPacks using smtp.vzwmail.net as their SMTP Server Name. Sending the iPack a patch file with updated SMTP server settings prior to 8/29/09 will prevent an interruption in your iPack's communication. Please contact NRG for assistance with sending a patch file, or check out the forum entries related to patch files for detailed instructions. Wireless Innovation's Packet-Mail service is inexpensive and has been tested by NRG and found to work very well with iPacks. For pricing information or to contact Wireless Innovation, send email to: sales@wi-ltd.net
  15. Please contact NRG Technical Support for a Return Authorization number, and we'll get those replaced for you.
  16. If you encounter difficulty in sending the APN (Access Point Name) to your GSM iPack, try closing SDR, reopening it, and then try sending again. This usually resolves the problem. If not, contact NRG Tech Support for assistance.
  17. Unfortunately there is no way to test the GSM and ISP settings without the Symphonie logger. However, you may send us a copy of your *.ipk file to review. While we can't test your actual GSM connection, we can at least review the settings and see if there are any obvious problems. You can email the *.ipk file to me at jma@nrgsystems.com. If you have multiple monitoring sites, it would be good to have a spare logger on hand for testing or available for quick replacement if one of your sites gets hit by lightning. We sometimes have refurbished units available at discounted prices - please contact our sales department for more details.
  18. A customer recently realized he had connected an RM Young Wind Monitor to one of Symphonie's built-in #40 anemometer channels instead of connecting it to channel 4, 5, or 6 using a Wind Monitor SCM. He wondered how this would affect his measurements. While this configuration is not recommended, the data themselves may be OK. The difference between the Wind Monitor SCM and the built-in channels is that the 05103 has a maximum frequency much higher than the maximum frequency of a #40C anemometer, so the filter on the SCM is set to a much higher frequency to ensure that it does not attenuate the signal too much at the high end of the wind speed range. The #40 channels don't expect to see frequencies much above 80 Hz (corresponding to wind speed around 60 m/s). The 05103 would be putting out over 600 Hz at that speed. The filter would knock down the amplitude a lot, but the amplitude is pretty high to start with on that generator. For wind speeds below 8 m/s, the data will certainly be fine. Only high wind speeds might be reading artificially low. It depends on the (unspecified) actual amplitude of the signal from that particular sensor. To be absolutely sure measurements of higher wind speeds will be correct, try spinning the 05103 at a known wind speed and verifying that the wind speed being detected by the logger is correct.
  19. If your satellite iPack returns an internet error 072, it typically means there is an error in the "Sender's Email Address" field in your iPack's *.ipk file. The Sender's Email Address field must be filled in with the account number (typically this is identical to the numbers in the Mailbox Name field), followed by "@michrosat.com". For example: 881693156666@michrosat.com
  20. AWEA Windpower 2009 Paper V5-11-09.pdf Paper submitted for AWEA Windpower 2009 Conference, 4 - 7 May 2009, Chicago, IL, USA "Investigation of the NRG #40 Anemometer Slowdown" by Steven H. Clark, Principal Investigator Owen Clay, John A. Goglia, Timothy R. Hoopes, Lawrence T. Jacobs, R. Paul Smith
  21. AWEA Windpower 2009 Presentation V5-12-09.pdf "Investigation of the NRG #40 Anemometer Slowdown" Presented 7 May 2009 by Steven Clark, Mechanical Engineer, NRG Systems, Inc. AWEA WINDPOWER Conference and Exhibition 2009, Chicago, IL
  22. Please note that we no longer sell the Dial-up iPack for POTS (plain old telephone service), so satellite is the remaining option.
  23. #40H anemometers are also potentially affected by the vibratory mode problem.
  24. Hello, Erick - The #40H is NOT the same sensor as the #40C. The #40H Hall Effect anemometer requires power and provides a square wave output signal. The #40C provides a self-generated AC sine wave output signal.
  25. We would be happy to replace any anemometers still under warranty free of charge (free shipping, too). Please contact your NRG salesperson for assistance.
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