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Gill Instruments: environmental & industrial monitoring solutions
Technical Key Note
Page 1 of 2 Contact us for more information - www.gillinstruments.com or +44 1590 613500
Key Note Series Number KN1803
Subject Gill Products Meet MEASNET
Applicable models WindObserver / WindMaster / WindMasterPro
Date: 27th November 2015 Introduction 2-axis and 3-axis wind measurement is important within the wind energy market. Wind speed data is used to determine the power curve for the wind turbines at the installation site and 3-axis axis data is used to determine the wind characteristics at the site before, during and after installation of turbines. Ultrasonic Solution We are pleased to confirm that both the WindObserver and the WindMaster/WindMasterPro have met the MEASNET requirements for “linearity” and we can provide example certificates (attached). As MEASNET requires an individual certificate for each sensor we can assist with providing these via SOH in Denmark, SOH in the USA or DWG in Germany. Further Work for MEASNET During 2016 the MEASNET requirements will change to include ultrasonic for 2D measurement and a requirement to provide the vertical component. Gill will have WindSonic, WindObserver and WindMaster/WindMasterPro tested to provide a classification as soon as possible. About MEASNET MEASNET is a co-operation of companies which are engaged in the field of wind energy and want to ensure high quality measurements, uniform interpretation of standards and interchangeability of results. The members established an organizational structure for MEASNET and perform mutual and periodical quality assessments for their harmonized measurements and evaluations. The highest tier is the Council of Members. An Executive Board, composed of three representatives from different members executes the tasks delegated by the Council of Members. Several Expert Groups, specializing in certain measurement tasks, advise and support the Executive Board and the Council of Members on the definition of the measurement procedures. Assessment Teams are established to perform assessments for the admission of new members and for the periodical quality confirmations of MEASNET members. All MEASNET members must be accredited by ISO/IEC 17025 for the MEASNET approved measurements.
Gill Instruments: environmental & industrial monitoring solutions
Technical Key Note
Page 2 of 2 Contact us for more information - www.gillinstruments.com or +44 1590 613500
MEASNET certification has always been required for instrumentation used at wind turbine sites where the data is being used by the financial institutions that are backing the site. However, only cup anemometers are currently classified under MEASNET. These cups have under gone the extensive proving process to obtain a classification and then each individual cup has a “linearity” check under MEASNET before and after installation. However, there are shortfalls with cups as they are a mechanical sensor and so the market is moving to include ultrasonic sensors so that the advantages of no maintenance and increased robustness can be used.
Deutsche WindGuardWind Tunnel Services GmbH, Varel
accredited by the / akkreditiert durch die
Deutsche Akkreditierungsstelle GmbHas calibration laboratory in the / als Kalibrierlaboratorium im
Deutschen Kalibrierdienst
Calibration certificate Calibration markKalibrierschein Kalibrierzeichen
1522514
08/2015
D-K-15140-01-00
ObjectGegenstand
2D Sonic Anemometer
ManufacturerHersteller
Gill InstrumentsUK-Hampshire S041 9EG
TypeTyp
1390-65-B-124
Serial numberFabrikat/Serien-Nr.
1522054
CustomerAuftraggeber
Gill InstrumentsUK-Hampshire S041 9EG
Order No.Auftragsnummer
M42664
Project No.Projektnummer
VT150705
Number of pagesAnzahl der Seiten
5
Date of CalibrationDatum der Kalibrierung
04.08.2015
This calibration certificate documents thetraceability to national standards, which realizethe units of measurement according to theInternational System of Units (SI).The DAkkS is signatory to the multilateralagreements of the European co-operation forAccreditation (EA) and of the InternationalLaboratory Accreditation Cooperation (ILAC) forthe mutual recognition of calibration certificates.The user is obliged to have the objectrecalibrated at appropriate intervals.Dieser Kalibrierschein dokumentiert die Rück-führung auf nationale Normale zur Darstellungder Einheiten in Übereinstimmung mit demInternationalen Einheitensystem (SI).Die DAkkS ist Unterzeichner der multilateralenÜbereinkommen der European co-operation forAccreditation (EA) und der InternationalLaboratory Accreditation Cooperation (ILAC) zurgegenseitigen Anerkennung der Kalibrierscheine.Für die Einhaltung einer angemessenen Frist zurWiederholung der Kalibrierung ist der Benutzerverantwortlich.
This calibration certificate may not be reproduced other than in full except with the permission of both the GermanAccreditation Body and the issuing laboratory. Calibration certificates without signature are not valid. This calibrationcertificate has been generated electronically.Dieser Kalibrierschein darf nur vollständig und unverändert weiterverbreitet werden. Auszüge oder Änderungen bedürfen derGenehmigung sowohl der Deutschen Akkreditierungsstelle als auch des ausstellenden Kalibrierlaboratoriums. Kalibrierscheineohne Unterschrift haben keine Gültigkeit. Dieser Kalibrierschein wurde elektronisch erzeugt.
DateDatum
Head of the calibration laboratoryLeiter des Kalibrierlaboratoriums
Person in chargeBearbeiter
04.08.2015
Dipl. Phys. Dieter Westermann Heiko Westermann, B. Sc.
Page 2 / 5Seite
Deutsche WindGuardWind Tunnel Services GmbH, Varel
1522514
08/2015
D-K-15140-01-00
Calibration objectKalibriergegenstand
2D Sonic Anemometer
Calibration procedureKalibrierverfahren
• Deutsche WindGuard Wind Tunnel Services: Calibration of anemometers;Version 1.0 (2014)Based on following standards:• MEASNET: Anemometer calibration procedure• IEC 61400-12-1: Power performance measurements of electricity producingwind turbines• IEC 61400-12-2: Power performance of electricity producing wind turbinesbased on nacelle anemometry• ISO 3966: Measurement of fluid in closed conduits• ISO 16622: Meteorology - Sonic anemometers/thermometers
Place of calibrationOrt der Kalibrierung
Windtunnel of Deutsche WindGuard WindTunnel Servies GmbH, Varel
Test conditionsMessbedingungen
wind tunnel area 10000 cm²
anemometer frontal area 220 cm²
diameter of mounting pipe 50 mm
blockage ratio 1) 0.022 [-]
software version 7.641) Due to the special construction of the test section no blockage correction is necessary.
Ambient conditionsUmgebungsbedingungen
air temperature 25.2 °C ± 0.1 °C
air pressure 1012.0 hPa ± 0.3 hPa
relative air humidity 59.7 % ± 2.0 %
Measurement uncertaintyMessunsicherheit
The expanded uncertainty assigned to the measurement results is obtained bymultiplying the standard uncertainty by the coverage factor k = 2. It has beendetermined in accordance with DAkkS-DKD-3. The value of the measurand lieswithin the assigned range of values with a probability of 95%.The reference flow speed measurement is traceable to the German NMI(Physikalisch-Technische Bundesanstalt) standard for flow speed. It is realizedby using a PTB owned and calibrated Laser Doppler Anemometer (StandardUncertainty 0.2 %, k=2)
Latest accreditationLetzte Akkreditierung
04/2014
Additional remarksZusätzliche Anmerkungen
Orientation: 45 deg
Page 3 / 5Seite
Deutsche WindGuardWind Tunnel Services GmbH, Varel
1522514
08/2015
D-K-15140-01-00
Calibration resultKalibrierergebnis
Sensor speed Sensor dir Tunnel speed Uncertainty (k=2)
m/s deg m/s m/s
3.907 45.000 3.957 0.050
5.787 45.000 5.902 0.050
7.779 45.000 7.982 0.050
9.749 45.000 9.979 0.050
11.751 45.000 12.035 0.050
13.566 45.000 13.955 0.050
15.561 45.000 15.980 0.050
14.603 45.000 15.017 0.050
12.677 45.000 13.019 0.050
10.703 45.000 10.971 0.050
8.801 45.000 8.989 0.050
6.848 45.000 6.993 0.050
4.802 45.000 4.908 0.050
File: 1522514
Linear regression analysis Slope 1.03201 (m/s)/(m/s) ±0.00131 (m/s)/(m/s)
Offset -0.0690 m/s ±0.014 m/s
Standard error (Y) 0.018 m/s
Correlation coefficient 0.999991
Remarks The calibrated sensor complies with thedemanded linearity of MEASNET
Page 4 / 5Seite
Deutsche WindGuardWind Tunnel Services GmbH, Varel
1522514
08/2015
D-K-15140-01-00
Graphical representation of the resultGrafische Darstellung des Ergebnises
Photo of the measurement setupFoto des Messaufbaus
Remark: The proportions of the set-up may not be true to scale due to imaging geometry.
Page 5 / 5Seite
Deutsche WindGuardWind Tunnel Services GmbH, Varel
1522514
08/2015
D-K-15140-01-00
Sensor config during calibrationSensorkonfiguration während der Kalibrierung
D1
D
E522054
D1
D2
D
6.05.
D2
D3
D)current configuration :
A0 B3 C1 E1 F1 G0000 J1 K1 L1 M2 NA O1 P1 T1 U1 V1 X1 Y1 Z1
D3
D7
DRD
Deutsche WindGuardWind Tunnel Services GmbH, Varel
accredited by the / akkreditiert durch die
Deutsche Akkreditierungsstelle GmbHas calibration laboratory in the / als Kalibrierlaboratorium im
Deutschen Kalibrierdienst
Calibration certificate Calibration markKalibrierschein Kalibrierzeichen
1522485
07/2015
D-K-15140-01-00
ObjectGegenstand
3D Sonic Anemometer
ManufacturerHersteller
Gill InstrumentsUK-Hampshire S041 9EG
TypeTyp
1590-PK-020
Serial numberFabrikat/Serien-Nr.
Y152201
CustomerAuftraggeber
Gill InstrumentsUK-Hampshire S041 9EG
Order No.Auftragsnummer
M42664
Project No.Projektnummer
VT150742
Number of pagesAnzahl der Seiten
5
Date of CalibrationDatum der Kalibrierung
31.07.2015
This calibration certificate documents thetraceability to national standards, which realizethe units of measurement according to theInternational System of Units (SI).The DAkkS is signatory to the multilateralagreements of the European co-operation forAccreditation (EA) and of the InternationalLaboratory Accreditation Cooperation (ILAC) forthe mutual recognition of calibration certificates.The user is obliged to have the objectrecalibrated at appropriate intervals.Dieser Kalibrierschein dokumentiert die Rück-führung auf nationale Normale zur Darstellungder Einheiten in Übereinstimmung mit demInternationalen Einheitensystem (SI).Die DAkkS ist Unterzeichner der multilateralenÜbereinkommen der European co-operation forAccreditation (EA) und der InternationalLaboratory Accreditation Cooperation (ILAC) zurgegenseitigen Anerkennung der Kalibrierscheine.Für die Einhaltung einer angemessenen Frist zurWiederholung der Kalibrierung ist der Benutzerverantwortlich.
This calibration certificate may not be reproduced other than in full except with the permission of both the GermanAccreditation Body and the issuing laboratory. Calibration certificates without signature are not valid. This calibrationcertificate has been generated electronically.Dieser Kalibrierschein darf nur vollständig und unverändert weiterverbreitet werden. Auszüge oder Änderungen bedürfen derGenehmigung sowohl der Deutschen Akkreditierungsstelle als auch des ausstellenden Kalibrierlaboratoriums. Kalibrierscheineohne Unterschrift haben keine Gültigkeit. Dieser Kalibrierschein wurde elektronisch erzeugt.
DateDatum
Head of the calibration laboratoryLeiter des Kalibrierlaboratoriums
Person in chargeBearbeiter
17.08.2015
Dipl. Phys. Dieter Westermann Dipl.-Ing. (FH) Catharina Herold
Page 2 / 5Seite
Deutsche WindGuardWind Tunnel Services GmbH, Varel
1522485
07/2015
D-K-15140-01-00
Calibration objectKalibriergegenstand
3D Sonic Anemometer
Calibration procedureKalibrierverfahren
• Deutsche WindGuard Wind Tunnel Services: Calibration of anemometers;Version 1.0 (2014)Based on following standards:• MEASNET: Anemometer calibration procedure• IEC 61400-12-1: Power performance measurements of electricity producingwind turbines• IEC 61400-12-2: Power performance of electricity producing wind turbinesbased on nacelle anemometry• ISO 3966: Measurement of fluid in closed conduits• ISO 16622: Meteorology - Sonic anemometers/thermometers
Place of calibrationOrt der Kalibrierung
Windtunnel of Deutsche WindGuard WindTunnel Servies GmbH, Varel
Test conditionsMessbedingungen
wind tunnel area 10000 cm²
anemometer frontal area 220 cm²
diameter of mounting pipe 50 mm
blockage ratio 1) 0.022 [-]
software version 7.641) Due to the special construction of the test section no blockage correction is necessary.
Ambient conditionsUmgebungsbedingungen
air temperature 23.2 °C ± 0.1 °C
air pressure 1019.4 hPa ± 0.3 hPa
relative air humidity 57.6 % ± 2.0 %
Measurement uncertaintyMessunsicherheit
The expanded uncertainty assigned to the measurement results is obtained bymultiplying the standard uncertainty by the coverage factor k = 2. It has beendetermined in accordance with DAkkS-DKD-3. The value of the measurand lieswithin the assigned range of values with a probability of 95%.The reference flow speed measurement is traceable to the German NMI(Physikalisch-Technische Bundesanstalt) standard for flow speed. It is realizedby using a PTB owned and calibrated Laser Doppler Anemometer (StandardUncertainty 0.2 %, k=2)
Latest accreditationLetzte Akkreditierung
04/2014
Additional remarksZusätzliche Anmerkungen
Orientation: 180°
Page 3 / 5Seite
Deutsche WindGuardWind Tunnel Services GmbH, Varel
1522485
07/2015
D-K-15140-01-00
Calibration resultKalibrierergebnis
Sensor v_hor Sensor dir Sensor v_vert Tunnel speed Uncertainty (k=2)
m/s deg m/s m/s m/s
3.948 180.787 -0.010 3.953 0.050
5.876 180.169 -0.022 5.893 0.050
7.869 180.363 -0.026 7.890 0.050
9.809 180.506 -0.025 9.842 0.050
11.796 180.825 -0.023 11.848 0.050
13.701 180.831 -0.015 13.769 0.050
15.650 181.000 -0.002 15.739 0.050
14.714 180.963 -0.006 14.803 0.050
12.749 180.975 -0.022 12.817 0.050
10.761 180.688 -0.026 10.813 0.050
8.840 180.525 -0.025 8.878 0.050
6.889 180.131 -0.024 6.919 0.050
4.880 180.381 -0.017 4.903 0.050
File: 1522485
Linear regression analysis Slope 1.00687 (m/s)/(m/s) ±0.00056 (m/s)/(m/s)
Offset -0.0224 m/s ±0.006 m/s
Standard error (Y) 0.008 m/s
Correlation coefficient 0.999998
Remarks The calibrated sensor complies with thedemanded linearity of MEASNET
Page 4 / 5Seite
Deutsche WindGuardWind Tunnel Services GmbH, Varel
1522485
07/2015
D-K-15140-01-00
Graphical representation of the resultGrafische Darstellung des Ergebnises
Photo of the measurement setupFoto des Messaufbaus
Remark: The proportions of the set-up may not be true to scale due to imaging geometry.
Page 5 / 5Seite
Deutsche WindGuardWind Tunnel Services GmbH, Varel
1522485
07/2015
D-K-15140-01-00
Sensor config during calibrationSensorkonfiguration während der Kalibrierung
D1
D1
Y152201
D2
D2
2329-601-03
D3
D3
M2,U1,O1,L1,P5,B4,H1,NQ,E1,T1,S1,C2,A1,I1,J1,V1,X1,G0,K50,
D7
D7
NO DAC AVAILABLE