GB/T 16840.6-2012Technical determination methods for electrical fire evidence - Part 6: Micro-morphological analysis method using scanning electron microscope (English PDF)
电气火灾痕迹物证技术鉴定方法 第6部分：SEM微观形貌分析法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 31, 2012
Implementation date
October 1, 2013
Scope
GB/T 16840.6-2012 is the English-translated version of 电气火灾痕迹物证技术鉴定方法 第6部分：SEM微观形貌分析法.
GB/T 16840.6-2012 is the Chinese standard "Technical determination methods for electrical fire evidence - Part 6: Micro-morphological analysis method using scanning electron microscope".
Its scope clause reads: This section GB/T 16840 specifies the electrical fire mark evidence the technical appraisal methods scanning electron microscope (SEM) morphology Analysis of terms and definitions, principles, equipment, sample preparation, the observation site and the criterion.
Application of SEM to the fire scene molten metal traces microstructure analysis in this section applies to fire investigation, according to melt microscopic marks Morphology identification mark melt melting properties. Its clauses include terms and definitions.
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Document preview — GB/T 16840.6-2012
National Standard of the People's Republic of China
- ICS
- 13.220.20
- Classification
- C 82
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 3.1 Secondary electron
- 3.2 Secondary electron imaging
- 3.3 SEM resolving power solvingpowerforSEM
- 3.4 Magnification
- 3.5 Effective magnification
- 3.6 Melting marks meltedmark
- 3.7 Melting marks the morphology of micro-morphologyofmeltedmark
1 Scope
This section GB/T 16840 specifies the electrical fire mark evidence the technical appraisal methods scanning electron microscope (SEM) morphology
Analysis of terms and definitions, principles, equipment, sample preparation, the observation site and the criterion.
Application of SEM to the fire scene molten metal traces microstructure analysis in this section applies to fire investigation, according to melt microscopic marks
Morphology identification mark melt melting properties.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated edition applies to this article
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 13966 Analytical Instruments terms
GB/T 16840.1 mark evidence of electrical fire technical appraisal methods - Part 1. Macro method
3 Terms and Definitions
GB/T 13966 and GB/T 16840.1 as defined in the following terms and definitions apply to this document.
3.1 Secondary electron
Samples outer electrons of atoms excited by the incident electrons emitted to the inelastic scattering of electrons outside the sample.
3.2 Secondary electron imaging
After being secondary electron imaging detector receives.
3.3 SEM resolving power solvingpowerforSEM
On the secondary electron image measured by the ratio of the minimum distance and the magnification can be clearly separated between the two object points.
3.4 Magnification
Length ratio of the length of the original physical object enlarged.
3.5 Effective magnification
The ratio of the human eye resolution and the resolution of the instrument.
3.6 Melting marks meltedmark
In the external short circuit arc flame or high temperature, the metal surface, especially the formation of copper, aluminum conductor circular, crater-like, nodular, sharp
Shaped and other irregular Microfused or full penetration marks.
3.7 Melting marks the morphology of micro-morphologyofmeltedmark
Under certain magnification observable traces Minute melt form.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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GB/T 16840.7-2021 — Technical determination methods for electrical fire evidence - Part 7: Component analytic method of energy dispersive spectrometry
GB/T 16840.5-2012 — Technical determination methods for electrical fire evidence - Part 5: Method of recognizing and collecting the physical evidence of electrical fire
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