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JJF 1862-2020: Calibration Specification for Large Multi-channel Ultrasonic Flaw Detectors
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JJF 1862-2020English369 Add to Cart 3 days [Need to translate] Calibration Specification for Large Multi-channel Ultrasonic Flaw Detectors

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Basic data

Standard ID JJF 1862-2020 (JJF1862-2020)
Description (Translated English) Calibration Specification for Large Multi-channel Ultrasonic Flaw Detectors
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A59
Word Count Estimation 16,117
Date of Issue 2020-09-11
Date of Implementation 2021-03-11
Regulation (derived from) Announcement No. 40 (2020) of the State Administration for Market Regulation
Issuing agency(ies) State Administration for Market Regulation

JJF 1862-2020: Calibration Specification for Large Multi-channel Ultrasonic Flaw Detectors


---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 Large Multi-channel Ultrasonic Flaw Detectors National Metrology Technical Specifications of the People's Republic of China Calibration specification for large multi-channel ultrasonic flaw detector 2020-09-11 released 2021-03-11 implementation Issued by the State Administration for Market Regulation Large multi-channel ultrasound Calibration specification for flaw detector Focal point. National Technical Committee of Acoustics Measurement Main drafting unit. China Institute of Metrology Jilin Institute of Metrology Beijing University of Chemical Technology This specification entrusts the National Acoustics Metrology Technical Committee to be responsible for interpretation The main drafters of this specification. Xing Guangzhen (China Institute of Metrology) Fang Facheng (Jilin Institute of Metrology) Zhu Haijiang (Beijing University of Chemical Technology) Min Wang (China Institute of Metrology)

table of Contents

Introduction (Ⅱ) 1 scope (1) 2 Reference documents (1) 3 Terms and measurement units (1) 3.1 Pulse repetition frequency (1) 3.2 Time base linearity (1) 3.3 Gain linearity (1) 3.4 Flaw detection sensitivity (2) 3.5 Signal-to-noise ratio of detection sensitivity (2) 4 Overview (2) 5 Measurement characteristics (2) 5.1 Stability (2) 5.2 Display jitter(2) 5.3 Pulse repetition frequency (2) 5.4 Time base linear (2) 5.5 Gain linearity (2) 5.6 Detection sensitivity (2) 5.7 Consistency of detection sensitivity between channels (2) 5.8 Detection sensitivity signal-to-noise ratio (3) 6 Calibration conditions (3) 6.1 Environmental conditions (3) 6.2 Measurement standards and other equipment (3) 7 Calibration items and calibration methods (3) 7.1 Calibration items (3) 7.2 Calibration method (3) 8 Expression of calibration results (6) 8.1 Processing of calibration results (6) 8.2 Calibration certificate (6) 8.3 Evaluation of Uncertainty of Calibration Results (6) 9 Recalibration interval (6) Appendix A Contents of Calibration Certificate (7) Appendix B. Evaluation Example of Measurement Uncertainty of Time-base Linearity Error (9)

Introduction

This specification is based on JJF 1071-2010 "Rules for the Compilation of National Metrology and Calibration Specifications" and JJF 1059.1-2012 "Evaluation and Expression of Measurement Uncertainty" was compiled. This specification refers to GB/T 27664.1-2011 "Performance and Inspection of Non-destructive Testing Ultrasonic Testing Equipment, Part 1 Part. Instrumentation puts forward requirements for the measurement performance of the equipment, that is, the measurement performance includes stability, display jitter, Pulse repetition frequency, etc., and refer to GB/T 27664.3-2011 "Performance and Inspection of Ultrasonic Testing Equipment for Nondestructive Testing" Test Part 3.Combined Equipment" comprehensively evaluates time-base linearity, gain linearity, flaw detection sensitivity and signal-to-noise ratio. This specification is released for the first time. Calibration specification for large multi-channel ultrasonic flaw detector

1 Scope

This specification applies to the calibration of large-scale multi-channel ultrasonic flaw detectors based on type A pulsed ultrasonic flaw detectors. Calibration of damage testing equipment can also be used as a reference.

2 Reference documents

This specification refers to the following documents. JJF 1001 General measurement terms and definitions JJF 1034 Acoustic measurement terms and definitions JJF 1294-2011 Ultrasonic flaw detector transducer calibration specification GB/T 3102.7-1993 Acoustic quantities and units GB/T 19799.2-2012 Non-destructive testing Ultrasonic testing No. 2 calibration test block GB/T 27664.1-2011 Non-destructive testing. Performance and inspection of ultrasonic testing equipment. Part 1.Instruments GB/T 27664.3-2011 Non-destructive testing. Performance and inspection of ultrasonic testing equipment. Part 3.Combined equipment For dated reference documents, only the dated version applies to this specification; for undated reference documents, The latest version (including all amendments) is applicable to this specification.

3 Terms and units of measurement

This specification adopts the quantities and units specified in GB/T 3102.7-1993. Terms defined in JJF 1001, JJF 1034, JJF 1294-2011 and GB/T 27664.1-2011 and the following And definitions apply to this specification. 3.1 Pulse repetition frequency The number of pulses generated per unit time, in Hz. [GB/T 27664.1-2011, definition 3.23] 3.2 Time base linear The input signal provided by a calibrated time generator or multiple reflections of a plate of known thickness and its time base A measure of the degree of close proportional relationship between the indicated signal positions. [GB/T 27664.1-2011, definition 3.15] 3.3 Gain linearity The signal amplitude input to the receiver of the ultrasonic flaw detector and its display (or additional display) on the ultrasonic detector The displayed amplitude is close to a measure of the degree of proportional relationship. [GB/T 27664.1-2011, definition 3.16, with modification] ...

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