GA/T 1670-2019 English PDF

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GA/T 1670-2019: Forensic sciences--General technical specifications for comparison microscopes
Status: Valid

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GA/T 1670-2019	229	Add to Cart	3 days	Forensic sciences--General technical specifications for comparison microscopes	Valid

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Basic data

Standard ID: GA/T 1670-2019 (GA/T1670-2019)
Description (Translated English): Forensic sciences--General technical specifications for comparison microscopes
Sector / Industry: Public Security (Police) Industry Standard (Recommended)
Classification of Chinese Standard: A92
Classification of International Standard: 13.310
Word Count Estimation: 10,153
Date of Issue: 2019
Date of Implementation: 2019-12-01
Issuing agency(ies): Ministry of Public Security

GA/T 1670-2019: Forensic sciences--General technical specifications for comparison microscopes

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Forensic sciences--General technical specifications for comparison microscopes ICS 13.310 A92 Public Safety Industry Standards of the People's Republic of China General technical requirements for forensic scientific comparison microscopes Published on October 14,.2019 2019-12-01 Implementation Issued by the Ministry of Public Security of the People's Republic of China

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the National Criminal Technology Standardization Technical Committee Criminal Technical Products Sub-Technical Committee (SAC/TC179/SC8) And put it together. This standard was drafted by. Wuhu Wanjiang Photoelectric Instrument Co., Ltd. and the Center for Physical Evidence Appraisal of the Ministry of Public Security. The main drafters of this standard. Ren Yong, Li Lei, Lu Liang, Zhong Lijing, Li Xiuming. General technical requirements for forensic scientific comparison microscopes

1 Scope

This standard specifies the basic parameters, general requirements, test methods, inspection rules, signs, packaging, transportation and Storage. This standard applies to optical comparison microscopes with two object-side fields of view and dual optical paths.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document. GB 4793.1-2007 Safety requirements for electrical equipment for measurement, control and laboratory use Part 1.General requirements GB/T 9246-2008 microscope eyepiece GB/T 13384-2008 General technical requirements for packaging of electromechanical products GB/T 19863-2005 Test method of stereo microscope GB/T 19864.2-2013 Stereo microscope Part 2.High-performance stereo microscope JB/T 9329-1999 Basic environmental conditions and test methods of instrumentation transportation, transportation and storage

3 Basic parameters

The technical parameters of the forensic scientific comparison microscope (hereinafter referred to as the comparison microscope) shall comply with the provisions of Table 1. Table 1 Basic parameters Basic parameter specifications Connection size of eyepiece and lens tube ϕ23.2mm F8/h8, ϕ30mm (30.5mm) F8/h8 There is no difference between the left and right magnifications when the left and right objective magnifications are visually observed (same as the ruler scale) Left and right stage linkage with left and right direction and up and down direction The range of the focusing mechanism (effective movement in the three directions of the stage X, Y, Z) is not less than 45mm Eyepiece magnification is selected according to GB/T 9246-2008 The adjustment range of the binocular pupillary distance when observed with 10× eyepieces is that the minimum pupil distance is not greater than 55mm and the maximum is not less than 75mm Eyepiece diopter adjustment range (diopter) 4D~-6D

4 General requirements

4.1 Appearance 4.1.1 There should be no peeling, spots and uneven coloring on the electroplated surface. 4.1.2 The color of the paint surface is uniform, and there should be no paint stripping, damage marks and defects that hinder the appearance. ......

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