JJF 1914-2021 English PDF

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JJF 1914-2021: (Calibration Specification for Metallographic Microscope)
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1914-2021	199	Add to Cart	3 days	(Calibration Specification for Metallographic Microscope)	Valid

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Basic data

Standard ID: JJF 1914-2021 (JJF1914-2021)
Description (Translated English): (Calibration Specification for Metallographic Microscope)
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A52
Word Count Estimation: 10,146
Issuing agency(ies): State Administration for Market Regulation

JJF 1914-2021: (Calibration Specification for Metallographic Microscope)

---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.
(Calibration Specification for Metallographic Microscope) National Metrology Technical Specification of the People's Republic of China Calibration Specifications for Metallographic Microscopes Published on 2021-07-28 2022-01-28 Implementation Released by the State Administration for Market Regulation Calibration Specifications for Metallographic Microscopes Focal Point. National Technical Committee on Geometric Length Measurement Main drafting unit. Jiangsu Institute of Metrology Wuxi Metrology and Testing Institute Participating in the drafting unit. Taizhou Metrology and Testing Institute This specification entrusts the National Technical Committee of Geometry and Length Measurement to be responsible for the interpretation The main drafters of this specification. Ma Jianlong (Jiangsu Institute of Metrology) Wang Shugang (Wuxi Metrology and Testing Institute) Wu Xiang (Wuxi Metrology and Testing Institute) Wang Xiaofei (Jiangsu Institute of Metrology) Participating drafters. Li Hui (Wuxi Metrology and Testing Institute) Shi Feng (Jiangsu Institute of Metrology) Wu Xinfeng (Taizhou Metrology and Testing Institute)

content

Introduction (Ⅱ) 1 Scope(1) 2 References (1) 3 Overview(1) 4 Metrology Characteristics(1) 4.1 Relative deviation of left and right field of view center of binocular microscope (1) 4.2 Objective lens magnification error (1) 4.3 Indication error(1) 5 Calibration Conditions(1) 5.1 Environmental conditions (1) 5.2 Calibration standard (2) 6 Calibration items and calibration methods (2) 6.1 Relative deviation of left and right field of view center of binocular microscope (2) 6.2 Objective lens magnification error(2) 6.3 Indication error(3) 7 Expression of calibration results (3) 8 Recalibration interval(3) Appendix A Example of Calibration Uncertainty Evaluation of Indication Error (4)

Introduction

JJF 1071-2010 "Rules for the Compilation of National Metrology Calibration Standards", JJF 1001-2011 "General Metrology Terms and Definition" and JJF 1059.1-2012 "Measurement Uncertainty Evaluation and Representation" together constitute support for the formulation of this specification The basic series of specifications. In the formulation process of this specification, reference is made to GB/T 22059-2018 "Microscope Magnification Values, Tolerances and Symbols" No." and JB/T 10077-1999 "Metallographic Microscope". This specification is published for the first time. Calibration Specifications for Metallographic Microscopes

1 Scope

This specification applies to monocular, binocular observation type and metallographic microscopes with image sensor receiving type. calibration.

2 Reference documents

This specification references the following documents. JJF 1071-2010 Rules for Compilation of National Metrology and Calibration Specifications JB/T 10077-1999 Metallographic microscope For dated references, only the dated version applies to this specification; for undated references The latest version (including all amendments) applies to this specification.

3 Overview

A metallographic microscope is an optical instrument used to observe and measure the microstructure of metals. According to metallographic microscope The method of observing the image of the object can be divided into the eyepiece observation type and the image sensor receiving type metallographic microscope.

4 Metrology characteristics

4.1 Relative deviation of left and right field of view center of binocular microscope Up and down. not more than 0.2mm; Left and right. the outer side is not more than 0.2mm; the inner side is not more than 0.4mm. 4.2 Objective lens magnification error The maximum allowable error of the magnification of the objective lens is generally not more than ±5%. 4.3 Indication error Indication error generally does not exceed the provisions of Table 1. Table 1 Indication error Objective lens magnification Γ≤10× 10×< Γ≤50× Γ >50× Indication error ±(0.01mm 5×10-2L) ±(0.003mm 5×10-2L)±(0.002mm 5×10-2L) Note. L---Measurement length. Note. The calibration work does not judge whether it is qualified or not, and the above measurement characteristics requirements are for reference only.

5 Calibration Conditions

5.1 Environmental conditions 5.1.1 The indoor temperature for calibrating the metallographic microscope should be within the range of (20±5)℃. 5.1.2 The calibration room should be free from dust, vibration and corrosive gases that may affect calibration. ......

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