ASD-STAN PREN 4158-2005 Aerospace series Paints and varnishes Test method for measurements of electrical surface resistance of conductive layers (Edition P 1)《航空航天系列 油漆和清漆 测定导电层的表面.pdf
《ASD-STAN PREN 4158-2005 Aerospace series Paints and varnishes Test method for measurements of electrical surface resistance of conductive layers (Edition P 1)《航空航天系列 油漆和清漆 测定导电层的表面.pdf》由会员分享,可在线阅读,更多相关《ASD-STAN PREN 4158-2005 Aerospace series Paints and varnishes Test method for measurements of electrical surface resistance of conductive layers (Edition P 1)《航空航天系列 油漆和清漆 测定导电层的表面.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、AECMA STANDARD NORME AECMA AECMA NORM prEN 4158 Edition P 1 August 2005 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION Gulledelle 94 - B-1200 Brussels - Tel. + 32 2 775 8110 - Fax. + 32 2 775 8111 - www.aecma-stan.orgICS: Descriptors: ENGLISH VERSION Aerospace series
2、 Paints and varnishes Test method for measurement of electrical surface resistance of conductive layers Srie arospatiale Peintures et vernis Mesure de la rsistance de surface lectrique des couches conductrice Luft- und Raumfahrt Anstrichstoffe Messen des elektrischen Oberflchenwiderstandes von elekt
3、risch leitfhigen Schichten This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the expe
4、rts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and review b
5、y users and formal agreement of AECMA-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to implement the EN at national level by giving t
6、he EN the status of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 31 August 2005 Comments should be sent within six months after the date of publication to AECMA-STAN Non-metallic Material Domain Copyright 2005 by AECMA-STAN p
7、rEN 4158:2005 (E) 2 Foreword This standard was reviewed by the Domain Technical Coordinator of AECMA-STANs Non-metallic Material Domain. After inquiries and votes carried out in accordance with the rules of AECMA-STAN defined in AECMA-STANs General Process Manual, this standard has received approval
8、 for Publication. Contents Page 1 Scope . 3 2 Principle 3 3 Apparatus 3 3.1 Fixed Electrode Set up. 3 3.2 Electrical instruments. 4 4 Test specimens. 5 5 Procedure 5 5.1 Measuring conditions 5 5.2 Examination of the assembly of electrodes 5 5.3 Measuring of the electrical surface resistance on compo
9、nents 5 6 Results 7 7 Designation. 7 8 Test report 7 Bibliography 8 prEN 4158:2005 (E) 3 1 Scope This standard describes a method of measurement of the electrical resistance of electrically conducting surface coatings on non-conductive parts and samples for aerospace applications. If electrical cont
10、act areas are provided, the method is also applicable on electrical conducting layers overcoated with non-conducting layers. 2 Principle The principle of the method involves applying a known voltage U to the conductive layer, measuring the current I, and calculating the resistance Rmeasuredaccording
11、 to Ohms law: Rmeasured= IUThe resistance of the layer RLcan be calculated under the following assumptions (see Figure 1): homogeneous distribution of conducting particles in the layer layer thickness 3,5 d dimensions of sample under test 5 a inner resistance of electrodes, cables, and contact resis
12、tance between electrodes and surface of the sample are negligible. Then LR =daIn2 Rmeasured(1) 3 Apparatus 3.1 Fixed Electrode Set up The assembly of electrodes consists of an electrode support made from an insulate, made up of two electrodes of conductive silicone elastomer as well as the connectio
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