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JJF 1721-2018: Calibration Specification for Carbonization Depth Measuring Instruments and Calipers
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Calibration Specification for Carbonization Depth Measuring Instruments and Calipers
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JJF 1721-2018
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Basic data | Standard ID | JJF 1721-2018 (JJF1721-2018) | | Description (Translated English) | Calibration Specification for Carbonization Depth Measuring Instruments and Calipers | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A52 | | Word Count Estimation | 18,191 | | Date of Issue | 2018-12-25 | | Date of Implementation | 2019-03-25 | | Regulation (derived from) | State Administration of Markets, Announcement No. 34 of 2018 | | Issuing agency(ies) | State Administration for Market Regulation | JJF 1721-2018: Calibration Specification for Carbonization Depth Measuring Instruments and Calipers
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(Carbonization depth gauge and gauge calibration specifications)
National Metrology Technical Specification
Carbonization depth gauge and gauge calibration specifications
Published on.2018-12-25
2019-03-25 implementation
State Market Supervisory Administration released
Carbonization depth gauge and
Measuring rule calibration specification
Focal Point. National Geometric Quantity Engineering Measurement Technology Committee
Main drafting unit. Guangxi Zhuang Autonomous Region Metrology and Inspection Institute
Henan Institute of Metrology
Participated in drafting unit. Xiamen Saibao Industrial Technology Research Institute Co., Ltd.
Anhui Institute of Metrology
This specification entrusts the National Geometric Quantity Engineering Parameter Measurement Technical Committee to explain
The main drafters of this specification.
Yang Mingzhu (Guangxi Zhuang Autonomous Region Metrology and Testing Institute)
Huang Yuzhu (Henan Institute of Metrology)
Jia Xiaojie (Henan Institute of Metrology)
Participate in the drafters.
Chang Hao (Xiamen Saibao Industrial Technology Research Institute Co., Ltd.)
Ma Lin (Anhui Institute of Metrology)
Li Shuangding (Guangxi Zhuang Autonomous Region Metrology and Testing Institute)
Su Yixiong (Guangxi Zhuang Autonomous Region Metrology and Testing Institute)
table of Contents
Introduction (III)
1 Scope (1)
2 References (1)
3 terms (1)
4 Overview (1)
5 Measurement characteristics (3)
5.1 zero error (3)
5.2 Indication variability (3)
5.3 indication error (3)
5.4 proofreading block height (4)
6 Calibration conditions (4)
6.1 Environmental conditions (4)
6.2 Measurement standards and other equipment (4)
7 Calibration items and calibration methods (4)
7.1 Calibration Project (4)
7.2 Calibration method (4)
8 calibration result expression (5)
9 re-study interval (5)
Appendix A Example of Calibration Uncertainty Evaluation of Indicator Error of Pointed Carbonation Depth Gauge (6)
Appendix B Example of Calibration Uncertainty Evaluation for Numerical Display Carbonization Depth Gauge Indication Error (8)
Appendix C Calibration Certificate Contents and Inner Page Format (10)
Introduction
This specification is based on JJF 1071-2010 "Rules for the preparation of national metrological calibration specifications", JJF 1001-2011
Measurement Terms and Definitions, JJF 1094-2002 "Measuring Instrument Characteristics" and JJF 1059.1-2012
Volume Uncertainty Assessment and Representation is based on and based on the basis.
This specification is the first release.
Carbonization depth gauge and gauge calibration specifications
1 Scope
This specification applies to the measurement of the depth of carbonization with a graduation value/resolution of 0.25 mm and an upper limit of the measurement range up to 8 mm.
Instrument, and the degree of resolution/resolution is 0.01mm, 0.02mm, the measurement range is up to 70mm carbonization depth measurement
Calibration of the ruler. Other types of carbonization depth gauges and gauges are also available for reference.
2 reference files
This specification refers to the following documents.
JJG30 universal caliper
JGJ/T 23 Rebound method for testing concrete compressive strength
For dated references, only dated versions apply to this specification; undated quotations
The latest version (including all amendments) applies to this specification.
3 terms
3.1 Carbonization depth carbonizationdepth
The vertical distance between the carbonized and uncarbonized interface of the concrete to the concrete surface.
3.2 Rebound method
Using a spring-driven weight hammer, the concrete surface is struck by the impact rod (the force-transmitting rod), and the weight is detected to be rebounded.
The distance returned, with the rebound value (ratio of the bounce distance to the initial length of the spring) as an indicator related to the intensity,
A method of determining the strength of concrete.
4 Overview
The carbonization depth measuring instrument and measuring ruler are used to measure the surface carbonization layer of the measured surface when the concrete strength is measured by the rebound method.
Dedicated equipment for depth. It is widely used for the measurement of the depth of carbonized layers on concrete and other building materials. How it is read
Divided into pointer, cursor and digital. Its outline structure is shown in Figure 1, Figure 2, Figure 3, and Figure 4.
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