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| IEC Anemometer Specification/Classification and MEASNET |
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Vector Instruments' A100L2 and A100LK/A100LM anemometers are among the very few available having Class 1 performance ("First Class") according to the requirements of IEC and MEASNET standards.
The outline and mechanical design remains unchanged since the introduction of the Porton™ Anemometer in 1972, the electronics being continuously developed during this time to provide a well tried and reliable product.
Anemometers have, until recent years, only been calibrated/evaluated in wind tunnels. Investigation by the wind power industry has found that various anemometer designs behave differently in field conditions where there is considerable turbulence. The Vector Instruments A100 design is one of a very few which has been subjected to field trials, and these have shown that Vector Instruments' A100L2, A100LK, A100K and A100LM anemometers (using the R30/K2, R30/K and R30/M3 rotors) are amongst the very few cup anemometer designs which can be classified as having "First Class" performance according to the requirements of the IEC61400-12-1 when suitably sited and operated. This high performance classification means that measurements are accurate in the actual wind conditions experienced in the field (as opposed to just being accurate in the artificial conditions of a low-turbulence wind tunnel) making them the clear choice for wind assessment applications.
The results of field trials and wind-tunnel tests performed for us have shown that the A100L2 and A100LK/A100LM anemometers can be classified as "Class 1.7S" according to IEC61400-12-1 when suitably sited and operated.
The A100 series cup anemometer achieves "Class 1.0" performance under certain special conditions ("Class S" conditions, see the independent certification document which is available detailing this), however the A100 series also performs well in the standard "Class A" and "Class B" conditions. The report from the independent ACCUWIND project indicates that the A100 series can be classified as 1.8 for "Class A" conditions, and 4.5 for "Class B" conditions which is amongst the best (i.e. "Class 1.8A" and "Class 4.5B")
See also:Anemometers for Wind Turbine Testing and Wind Farm Site Assessment.
additional information regarding obtaining the highest accuracy measurements with our instruments.
MEASNET WebSite - for more information about MEASNET calibration procedures and facilities etc.
Links to Papers/Reports - for more independent information on our anemometer performance.
MEASNET describes itself as an "International Network for Harmonised and Recognised Measurements
in Wind Energy" and is an organisation of test/calibration facilities which are able to calibrate anemometers according to a common standard which is specifically aimed at Wind Power applications where the anemometers are to be used to survey a site in order to forecast the amount of wind power which might be generated should a wind turbine be erected on that site.
We are able to arrange for calibrations in MEASNET wind tunnels and supply our anemometers with individual MEASNET calibration certificates if required.
Please contact us for more information on MEASNET calibration options for our anemometers.
[Last Revised: May 2008]
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Windspeed Limited (trading as Vector Instruments),
115 Marsh Road, RHYL, North Wales, LL18 2AB, United Kingdom
Tel: +44 (0) 1745 350700 Fax: +44 (0) 1745 344206
Email: sales@windspeed.co.uk
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Website design and content is copyright (c) 2003-2010 Windspeed Limited (unless otherise stated). All trademarks are acknowledged.
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A100 Series Anemometers
