This part of ISO/IEC/IEEE 21451 defines communication methods and data formats for transducers (sensors and actuators) communicating with RFID tags. This part of ISO/IEC/IEEE 21451 also defines Transducer Electronic Data Sheet (TEDS) formats based on the ISO/IEC/IEEE 21451 series of standards and protocols for accessing TEDS and transducer data. It adopts necessary interfaces and protocols to facilitate the use of technically differentiated, existing technology solutions. It does not specify… read more transducer design or signal conditioning. There is currently no openly defined independent interface standard between transducers and RFID tags. Each vendor builds its own interface. Without such a standard, transducer interfacing and integration to RFID tags and systems are time-consuming and all vendors' duplicated efforts are economically unproductive. The purpose of this part of ISO/IEC/IEEE 21451 is to provide interfaces and methods for interfacing transducers to RFID tags and reporting transducer data within the RFID infrastructure. It also provides the means for device and equipment interoperability. read less

定价： 235元 / 折扣价： 200 元

This document recommends best practices for the measurement of partial discharges using AC voltages and VHF/UHF electromagnetic sensors for quality control during routine tests on factory and pre-moulded joints of HVDC extruded cable systems with rated voltage up to 800 kV. This recommended practice addresses the whole phenomenon of partial discharges, rather than solely on partial discharge pulse amplitude, in order to assess whether critical partial discharges are present in the tested object… read more (either a factory joint or a pre-moulded joint of a HVDC extruded cable system). By "critical partial discharge" it is meant here a discharge within the insulation of the object under test, excluding all external discharges that can be present during the AC voltage test, e.g. corona discharges due to HV electrodes, conducting leads, etc. related to the test setup. read less

定价： 59元 / 折扣价： 51 元