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Technical specification

Power Predictor technical specification

 

  • 3-cup pulse anemometer with data logger
  • Wind speeds accurate to +/- 3% in independently verified tests
  • 10 second recording interval, average taken every 10 minutes
  • Wind vane for measuring prevailing wind direction and turbulence (requires correct orientation)
  • Solar sensor for measuring solar irradiation
  • Self contained waterproof data logger engineered for low power operation
  • LCD screen provides live windspeed and solar indication
  • 512 MB SD memory card included with USB adaptor
  • Power Predictor Web application works through your browser - works with PC or Mac
  • Requires USB 1.0 or 2.0 port on your computer
  • Minimum 30 days data required before Power Report generated
  • PP3 9V battery supplied
  • 5m cable
  • Rugged UV resistant ABS plastic
  • RoHS compliant and fully CE certified
Mast pictured is available separately in a range of different heights to suit your project.
Comments (7)Add Comment
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written by Better Generation, April 20, 2010
@Sam
The Power Predictor is not IEC or MEASNET rated. However, a number of units have been individually tested in the wind tunnel at City University. The tests found the Power Predictor to be accurate to +/-0.5ms-1 at speeds below 17m/s and +/-3% at speeds above. Tests were also carried out at CAT (the Centre for Alternative Technology in Wales) and a regression of 98.02% on controlled wind speeds was found.

For projects up to 50 or even 100kW, anemometry devices that are not individually calibrated are considered suitable, both due to the level of accuracy required and to maintain the cost effectiveness.
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written by Sam J Townsend, April 07, 2010

Hi - do you have some sort of IEC or MEASNET rating for this anemometer.
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written by Better Generation, March 31, 2010
@larsen-b
Currently it is not possible to get live readings from the Power Predictor: a measurement is taken every 10 seconds, this is stored to the memory card in 10 minute averages. The data can then be uploaded from the memory card to your computer.

We will be launching a GSM version later in the year that will automatically update your software with your data daily.
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written by Larsen-b, March 31, 2010
Can I use the gauge to retrieve live information on my computer?
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written by Better Generation, November 06, 2009
@ mileshc
The Power Predictor takes a reading every 10 seconds and an average every 10minutes.
The sample rate can't be altered by the user.
The data logger is compatible with a SD card up to 2GB. As the device only uses 7.2Kb/day the included 512Mb memory card is certainly sufficient!
Average current consumption is 24uA.
The Power Predictor uses a CdS.
The solar sensor has been calibrated to show Watts/m2 on the online software.
There is small annual license renewal fee of £45.00+vat to access the online software.
The data is stored in CSV format.
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written by MilesHC, November 05, 2009
Hello, I assume the previous poster is asking what the sample rate is? i.e at 5 minute intervals?
Can the Sample rate be altered?
What is the largest SD card it can use i.e. 4gb?
What is the current consumption? (a lithium cell might be better?) or perhaps a small solar cell add on or mod?
How do you calculate the solar energy?
Do you use a CdS or photodiode?
If collecting data for more than a year or wishing to reuse the device on another site after a year, are there any costs to use the on-line service?
What file format is the data stored as? i.e ISO/IEC standard OpenDocument Format ODF or CSV?

Cheers
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written by Dmitry, June 27, 2009
what the discreteness measurements of wind speed (in which time comes the recording wind speed)

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