17 page 59, Dedicated external signal Check for details paragraph conditioning equipment such as of the signal 3, line 1 frequency to voltage converters, conditioning etc. shall be calibrated in isolation equipment used in from the anemometer, so allowing the test facility. the anemometer's calibration to be Check for the derived and reported in isolation calibration reports from signal conditioning equipment. of the entire listed signal conditioning equipment. 18 page 59, The resolution of the data Check for details paragraph acquisition system shall be at least of the data 4, line 1 0.02 m/s. Care shall also be acquisition system exercised in the case of an analogue voltage instrument, to Check for the ensure that the signal is adequately resolution used in buffered to prevent its attenuation the data by low impedance logging acquisition system equipment. 19 page 59, During calibration the anemometer Check for details paragraph shall be mounted on top of a tube of mounting 5, line 1 in order to minimize flow distortion. specifications This tube shall be of the same during the dimensions as the one on which anemometer the anemometer will be mounted in calibration. service in the free atmosphere. Check for details of mounting specifications required during service. 20 page 59, It is important to ensure that the Check for details paragraph anemometer is not influenced by of position of 6, line 1 the presence of any reference wind anemometer and speed measurement equipment. reference wind Conversely, the presence of speed anemometer shall not affect the measurement flow in the region of the reference equipment in the instrument. If flow distortion effects wind tunnel. are encountered, then the pitot Check for details tube shall be repositioned. of assessment of flow distortion from instruments on each other. 21 page 59, The pitot tubes shall be positioned Check for paragraph at the test section perpendicular to positioning of pitot 7, line 1 the flow field of the wind tunnel as tube with respect accurate as possible. to flow field. 22 page 59, The anemometer shall be Check for paragraph positioned at the test section positioning of 8, line 1 perpendicular to the flow field of anemometer with the wind tunnel as accurate as respect to flow possible. field.
17 page 59, paragraph 3, line 1 Dedicated external signal conditioning equipment such as frequency to voltage converters, etc. shall be calibrated in isolation from the anemometer, so allowing the anemometer's calibration to be derived and reported in isolation from signal conditioning equipment. Check for details of the signal conditioning equipment used in the test facility. Check for the calibration reports of the entire listed signal conditioning equipment. 18 page 59, paragraph 4, line 1 The resolution of the data acquisition system shall be at least 0.02 m/s. Care shall also be exercised in the case of an analogue voltage instrument, to ensure that the signal is adequately buffered to prevent its attenuation by low impedance logging equipment. Check for details of the data acquisition system Check for the resolution used in the data acquisition system 19 page 59, paragraph 5, line 1 During calibration the anemometer shall be mounted on top of a tube in order to minimize flow distortion. This tube shall be of the same dimensions as the one on which the anemometer will be mounted in service in the free atmosphere. Check for details of mounting specifications during the anemometer calibration. Check for details of mounting specifications required during service. 20 page 59, paragraph 6, line 1 It is important to ensure that the anemometer is not influenced by the presence of any reference wind speed measurement equipment. Conversely, the presence of anemometer shall not affect the flow in the region of the reference instrument. If flow distortion effects are encountered, then the pitot tube shall be repositioned. Check for details of position of anemometer and reference wind speed measurement equipment in the wind tunnel. Check for details of assessment of flow distortion from instruments on each other. 21 page 59, paragraph 7, line 1 The pitot tubes shall be positioned at the test section perpendicular to the flow field of the wind tunnel as accurate as possible. Check for positioning of pitot tube with respect to flow field. 22 page 59, paragraph 8, line 1 The anemometer shall be positioned at the test section perpendicular to the flow field of the wind tunnel as accurate as possible. Check for positioning of anemometer with respect to flow field.
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