A management server 103 holds a parameter of a sensor device 101 and change management information related to a change in the parameter, and transmits the changed parameter and the change management information to the sensor device. The sensor device 101 holds the parameter and the change management information transmitted from the management server, and transmits the change management information to the management server together with measurement data. The management server collates the received change management information and preliminarily-held change management information to determine the change in the parameter on the basis of a result of the collation.

A management server 103 holds a parameter of a sensor device 101 and change management information related to a change in the parameter, and transmits the changed parameter and the change management information to the sensor device. The sensor device 101 holds the parameter and the change management information transmitted from the management server, and transmits the change management information to the management server together with measurement data. The management server collates the received change management information and preliminarily-held change management information to determine the change in the parameter on the basis of a result of the collation.

A one-piece valve cluster for brass instruments that facilitates ease-of-maintenance and ease-of-repair includes an upper housing, a lower housing, a plurality of first bisected-casings, a plurality of second bisected-casings, a plurality of first bisected-ports, and plurality of second bisected-ports. The plurality of first bisected-casings and the plurality of first bisected-ports are fashioned into a first-milling face of the upper housing. Similarly, the plurality of second bisected-casings and the plurality of second bisected-ports are fashioned into a second-milling face of the lower housing. The upper housing is mounted to the lower housing to create a single piece valve cluster that can easily installed on the instrument. More specifically, the first-milling face is positioned coincident to the second-milling face. Once mounted, each first bisected-casing is positioned concentric to a corresponding second bisected-casing to form a single cylindrical casing for housing a rotor plug.

A key guard height adjuster for a brass instrument having a threaded rod configured to be received by a threaded bore of a key guard; a stem connecting the threaded rod to a key guard height adjuster head; and the adjuster head having a rounded top and a knurled edge. According to one approach, the adjuster head height can be in the range of about 4 mm to 10 mm. According to one approach, the adjuster head diameter is in the range of about 8 mm to 12 mm. According to one approach, the adjuster head is about 8 mm in width and about 6 mm in height.

A management server 103 holds a parameter of a sensor device 101 and change management information related to a change in the parameter, and transmits the changed parameter and the change management information to the sensor device. The sensor device 101 holds the parameter and the change management information transmitted from the management server, and transmits the change management information to the management server together with measurement data. The management server collates the received change management information and preliminarily-held change management information to determine the change in the parameter on the basis of a result of the collation.

A management server 103 holds a parameter of a sensor device 101 and change management information related to a change in the parameter, and transmits the changed parameter and the change management information to the sensor device. The sensor device 101 holds the parameter and the change management information transmitted from the management server, and transmits the change management information to the management server together with measurement data. The management server collates the received change management information and preliminarily-held change management information to determine the change in the parameter on the basis of a result of the collation.

A method for storing measured values of a wind turbine or a wind farm comprises recording several chronologically sequential measured values of a measured variable. The method also comprises acquiring a change between a previous measured value of the recorded measured values and the chronologically subsequent measured value of the recorded measured values and comparing the change with an adjustable or predefined threshold value. The method further comprises storing the subsequent measured value in a case where the change lies above the predefined threshold value, or discarding the subsequent measured value in a case where the change lies below the predefined threshold value. Embodiments further relate to a wind farm controller and to a wind farm with a wind farm controller.

A method for storing measured values of a wind turbine or a wind farm comprises recording several chronologically sequential measured values of a measured variable. The method also comprises acquiring a change between a previous measured value of the recorded measured values and the chronologically subsequent measured value of the recorded measured values and comparing the change with an adjustable or predefined threshold value. The method further comprises storing the subsequent measured value in a case where the change lies above the predefined threshold value, or discarding the subsequent measured value in a case where the change lies below the predefined threshold value. Embodiments further relate to a wind farm controller and to a wind farm with a wind farm controller.