Calibration

Calibration in accordance to MEASNET/IEC 61400-12-1 at a flow speed range of 4 to 16 m/s with 13 measurement points at a tilt angle of 0°. WindGuard has also established a fixed yaw orientation for each anemometer type to achieve a high repeatability of measurements results. DAkks / ILAC accredited calibration laboratory according to ISO 17025:2018 The wind sensor...

WindGuard operates the only commercially used pressurized wind tunnel worldwide where a measurement of pressure induced effects on wind sensor performance is possible! The wind tunnel itself is comprised of a sheet metal construction with a closed test section that is hermetically sealed, thus enabling a variation of internal air pressure. Therefore, pressure induced effects...

Measurements of temperature induced effects are performed in a climate wind tunnel. The whole wind tunnel is placed in an insulated and temperature-controlled chamber. Therefore, temperature induced effects on the whole anemometer can be measured rather than rely on simple assumptions (e. g. for mechanical anemometers temperature is only influencing bearing friction). For...

The European Commission introduced an implementing Regulation (EU) No 595/2009 of the European Parliament and of the Council as regards the determination of the CO2 emissions and fuel consumption of heavy-duty vehicles and amending Directive 2007/46/EC of the European Parliament and of the Council and Commission Regulation (EU) No 582/2011. Part of this regulation is the...

WindGuard is the leading expert in the classification of anemometers in accordance to IEC 61400-12-1:2017. The classification at WindGuard includes: - Standard MEASNET/IEC61400-12-1:2017 calibration of anemometers - Measurement of tilt angular response characteristics - Measurement of directional characteristics - Measurement of influence of temperature and air density -...

High speed calibrations (> 38 m/s) are performed in our large scale wind tunnel. Measurements of wind sensors are possible with flow speeds up to at least 90 m/s. Flow speed calibrations usually starts at a flow speed range of 10 m/s, with increments of 10 m/s at one yaw orientation. incl. costs for energy

Measurement in accordance to ISO 17713-1. The starting threshold will be determined by measuring the lowest wind speed at which the cups of the anemometer start to continuously turn and the anemometer is producing a measurable output signal. The anemometer is mounted with a tilt angle of 0 deg. During the measurements, the tunnel speed is slowly increased from 0 m/s upwards....

Wind tunnel measurements of starting threshold of wind vanes are performed in accordance to the ASTM D 5366 – 96. The starting threshold is determined by measuring the lowest speed at which the vane is moving from a 10° deflection to a position within 1° distance from the vane equilibrium state. The wind vane is mounted with a tilt angle of 0 deg. During the measurements,...

The procedure for the calibration of tilt response is in accordance to IEC 61400-12-1. The wind sensor is slowly tilted between -30° and 30° at a fixed wind speed of approx. 8 m/s and fixed yaw angle. The benefit of a continuous tilting is that the response of the sensor at any angle is considered. Therefore on this approach surprises at a non-evaluated angle can be avoided....

During a Wind Direction calibration in accordance to the IEC 61400-12-1, the wind sensor is slowly yawed for a whole revolution and back at a fixed flow speed of approx. 8 m/s and a fixed tilt angle of 0°. A stepwise calibration is possible, but not suggested from WindGuard. A continuous yawing considers the response of the wind sensor for each wind direction. For example,...