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JJF 1341-2012 English PDF

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JJF 1341-2012: Calibration Specification for Steel Bar Tarnish Measuring Instruments
Status: Valid

JJF 1341: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJF 1341-2012English439 Add to Cart 4 days [Need to translate] Calibration Specification for Steel Bar Tarnish Measuring Instruments Valid JJF 1341-2012
JJF 1341-1990English199 Add to Cart 2 days [Need to translate] O.T.N. of Secondary Standard for 4πβ(PPC)-γCoincidence Radioactivity Obsolete JJF 1341-1990

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Basic data

Standard ID JJF 1341-2012 (JJF1341-2012)
Description (Translated English) Calibration Specification for Steel Bar Tarnish Measuring Instruments
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A55
Classification of International Standard 17.220
Word Count Estimation 19,140
Quoted Standard JGJ/T 152-2008; GB/T 50344-2004
Regulation (derived from) State Administration of Quality Supervision, Inspection and Quarantine Notice 2012 No. 63;
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine
Summary This standard applies to measuring the extent of corrosion of reinforced calibration of the instrument.

JJF 1341-2012: Calibration Specification for Steel Bar Tarnish Measuring Instruments

---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 Steel Bar Tarnish Measuring Instruments People's Republic of China National Metrology Technical Specifications Steel corrosion measuring instrument calibration specification Issued on. 2012-04-17 2012-07-17 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Steel corrosion measuring instrument Calibration Specification Instruments Focal point. the National Technical Committee on Electromagnetic measurement Main drafting unit. Guangxi Institute of measurement testing Shandong Province Institute of Metrology Participated in the drafting. Guilin Institute of Metrology Jiangsu Province Institute of Metrology This specification commissioned the National Technical Committee Electromagnetic responsible for the interpretation of measurement The main drafters of this specification. Mo Huarong (Guangxi Institute of measurement detection) Yellow snow (Guangxi Institute of measurement detection) Lidao Min (Shandong Province Institute of Metrology) Drafters participate. Durui Qin (Guilin Institute of Metrology) Fan Yi (Jiangsu Province Institute of Metrology)

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2. References (1) 3 Overview (1) 4 Metrological characteristics (2) 4.1 The maximum permissible error (2) 4.2 potential measurement resolution (2) 4.3 potential measurement or output potential stability (2) 4.4 Electrical Safety (2) Calibration Condition 5 (2) 5.1 environmental conditions (2) 5.2 calibration standards and other measuring equipment (2) 6 calibration items and calibration methods (3) 6.1 calibration items (3) 6.2 Calibration method (3) 7 Calibration Results The expression (6) 8 recalibration intervals (6) Appendix A calibration original record format (7) Appendix B Calibration Certificate page format (8) Appendix C shows the potential measurement error Measurement Uncertainty Example (10) Appendix D shows the output current error Measurement Uncertainty Example (12)

Introduction

This specification based JJF 1071-2010 "National Calibration Specifications writing rules", JJF 1001-2011 "Tong Metering terms and definitions ", JJF 1059-1999" Evaluation and Expression of Uncertainty in Measurement "Prepared. This specification is the first national metrology technical specifications developed. Steel corrosion measuring instrument calibration specification

1 Scope

This specification is suitable for measuring the extent of steel corrosion instrument (hereinafter referred to as "corrosion meter") calibration. 2. References This specification refers to the following documents. JGJ/T 152-2008 Technical specification for concrete reinforcement detection GB/T 50344-2004 Technical standard for inspection of building structures For dated references, only the dated edition applies to this specification; undated reference documents Member, the latest edition (including any amendments) applies to this specification.

3 Overview

Corrosion meter is the instrument used to measure the degree of reinforcement corrosion. Corrosion of steel in concrete is an electrochemical oxidation-reduction process, so that the formation of a local cell reinforced in steel Formed around the potential difference. Corrosion meter works. measuring the potential relative to the concrete surface or surface of electrical steel Potential gradient, according to the size of the potential size of the potential gradient generated during steel corrosion or formed to determine whether or not reinforced The degree of corrosion or rust. AC power rust working principle shown in Figure 1. Figure 1 AC power supply corrosion meter operating principle Corroded battery-powered working principle shown in Figure 2.

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