共找到 153 条与 电学、磁学综合 相关的标准,共 11 页
1.1 This test method covers a procedure for determining relative complex permittivity (relative dielectric constant and loss) and relative magnetic permeability of isotropic, reciprocal (non-gyromagnetic) solid materials. If the material is nonmagnetic, it is acceptable to use this procedure to measure permittivity only. 1.2 This measurement method is valid over a frequency range of approximately 100 MHz to over 40 GHz. These limits are not exact and depend on the size of the specimen, the size of rectangular waveguide transmission line used as a specimen holder, and on the applicable frequency range of the network analyzer used to make measurements. The size of specimen dimension is limited by test frequency, intrinsic specimen electromagnetism properties, and the request of algorithm. Being a non-resonant method, the selection of any number of discrete measurement frequencies in a measurement band would be suitable. Use of multiple rectangular waveguide transmission line sizes are required to cover this entire frequency range (100 MHz to 40 GHz). This test method can also be generally applied to circular waveguide test fixtures. The rectangular waveguide fixture is preferred over coaxial fixtures when samples have in-plane anisotropy or are difficult to manufacture precisely. 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are in inch-pound units and are included for information only. The equations shown here assume an e+jωt harmonic time convention. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Standard Test Method for Measuring Relative Complex Permittivity and Relative Magnetic Permeability of Solid Materials at Microwave Frequencies Using Waveguide
5.1 工作条件 5.2 参比条件和基本误差 5.3 标称使用范围和改变量 5.4 准确度性能要求 5.5 结构和性能要求 5.6 气候影响 5.7 电气要求 5.8 电磁兼容性(EMC)
Digital display electric parameter measuring instrument
Testing methods of resistivity germanium
Testing method of resistivity for silicon crystals and silicon wafers with four - point probe
Standard Test Method for Measuring Relative Complex Permittivity and Relative Magnetic Permeability of Solid Materials at Microwave Frequencies Using Waveguide
1.1 This guide covers the application of routine calculations to estimate sample system lag time, in seconds, for gas, liquid, and mixed phase systems. 1.2 This guide considers the sources of lag time from the process sample tap, tap conditioning, sample transport, preanalysis conditioning and analysis. 1.3 Lag times are estimated based on a prediction of flow characteristics, turbulent, non turbulent, or laminar, and the corresponding purge requirements. 1.4 Mixed phase systems prevent reliable representative sampling so system lag times should not be used to predict sample representation of a mixed phase stream. 1.5 The values stated in inch-pound units are to be regarded as standard. Other units of measurement are included in this standard and Appendix X1 examples where normally seen in industry. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Standard Guide for Prediction of Analyzer Sample System Lag Times
本标准规定了永磁体表面磁场的术语及定义、测试原理、测试装置、试样与测试夹具、测试、测量、结果处理以及测试报告。
Test method for surface magnetic field of permanent magnet
Guidance for evaluation of products with respect to substance-use restrictions in electrical and electronic products
Magnetic materials – Part 11: Methods of measurement of the surface insulation resistance of electrical steel strip and sheet
Magnetic materials. Methods of measurement of the surface insulation resistance of electrical steel strip and sheet
Electricity metering data exchange — The DLMS / COSEM suite Part 3 - 1 : Use of local area networks on twisted pair with carrier signalling
本文件适用于探测 100-1000V 间的单极对地交、直流电压的电压测试器。
Voltage Tester
Short-circuit currents in three-phase AC systems – Part 4: Examples for the calculation of short-circuit currents
Superconductivity. Electronic characteristic measurements. Local critical current density and its distribution in large-area superconducting films
This part of IEC 62056 specifies the overall structure of the OBject Identification System (OBIS) and the mapping of all commonly used data items in metering equipment to their identification codes.
Electricity metering data exchange - The DLMS/COSEM suite - Part 6-1: Object Identification System (OBIS) (IEC 62056-6-1:2017); English version EN 62056-6-1:2017
Amendment 5 - International Electrotechnical Vocabulary (IEV) - Part 121: Electromagnetism
Short-circuit currents in d.c. auxiliary installations in power plants and substations — Part 1: Calculation of short-circuit currents
Short-circuit currents in d.c. auxiliary installations in power plants and substations ― Part 2: Calculation of effects
Amendment 3 - International Electrotechnical Vocabulary (IEV) - Part 121: Electromagnetism
Test method for volume resistivity of conductive powder for electromagnetic shielding
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