JJF 2017-2022 English PDF

US$379.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 2017-2022: Calibration Specification for Half-value Layer Meters of(20~150)kV X-ray beam
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 2017-2022	379	Add to Cart	4 days	Calibration Specification for Half-value Layer Meters of(20~150)kV X-ray beam	Valid

Similar standards

GB/T 3222.1   JJG 188   JJF 1396   JJF 1928   JJG 1179   JJF 1927   

Basic data

Standard ID: JJF 2017-2022 (JJF2017-2022)
Description (Translated English): Calibration Specification for Half-value Layer Meters of(20~150)kV X-ray beam
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A58
Word Count Estimation: 18,134
Date of Issue: 2022-12-27
Date of Implementation: 2023-06-27
Issuing agency(ies): State Administration for Market Regulation

JJF 2017-2022: Calibration Specification for Half-value Layer Meters of(20~150)kV X-ray beam

---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.
National Metrology Technical Specifications of the People's Republic of China (20~150)kV X-ray Beam Half Value Layer Calibration Specification Released on 2022-12-27 2023-06-27 Implementation Released by the State Administration for Market Regulation (20~150)kV X-ray beam Calibration Specifications for Half Value Layer Instruments Meters of(20~150)kVX-raybeam Responsible unit. National Technical Committee of Ionizing Radiation Metrology Main drafting unit. China Academy of Testing Technology Guangdong Institute of Metrology Participating in the drafting unit. The First Affiliated Hospital of Shandong First Medical University Tibet Autonomous Region Metrology and Testing Institute Hainan Metrology and Testing Institute This specification entrusts the National Technical Committee of Ionizing Radiation Metrology to be responsible for interpretation The main drafters of this specification. Xu Shimeng (China Academy of Testing Technology) He Yun (Guangdong Institute of Metrology) Yang Qian (China Academy of Testing Technology) Participating drafters. Fan Jie (China Academy of Testing Technology) Fan Yilu (The First Affiliated Hospital of Shandong First Medical University) Xie Haodong (Tibet Autonomous Region Metrology and Testing Institute) Wang Dingfeng (Hainan Metrology and Testing Institute)

Table of contents

Introduction (Ⅱ) 1 Scope(1) 2 References(1) 3 Terms and units of measurement(1) 3.1 Terminology(1) 3.2 Units of measurement(1) 4 Overview(1) 5 Metrological characteristics(2) 6 Calibration conditions(2) 6.1 Environmental conditions (2) 6.2 Standard installation(2) 6.3 Reference radiation field(2) 7 Calibration Items and Calibration Methods(2) 7.1 Calibration items(2) 7.2 General inspection (2) 7.3 Repeatability(3) 7.4 Indication error(3) 8 Calibration result expression(4) 9 Recalibration interval(4) Appendix A Radiation Quality of RQR, RQA, RQT, RQR-M and RQA-M Series (5) Appendix B Measurement method of the half-value layer of the reference radiation field (7) Appendix C Recommended Format for HLS Calibration Records (8) Appendix D HLS Calibration Certificate Inner Page Format (9) Appendix E Example of Uncertainty Evaluation of Indication Error of Half-value Layer Instrument (10)

Introduction

The compilation of this specification is based on JJF 1071-2010 "National Measurement and Calibration Specification Compilation Rules", JJF 1001-2011 "General Metrology Terms and Definitions", JJF 1035-2006 "Ionizing Radiation Metrology Terms and Definitions", JJF 1059.1- 2012 "Assessment and Expression of Measurement Uncertainty" as the basis and basis. Calibration methods and measurement characteristics mainly refer to IEC 61267.2005 "Radiation conditions for the use of measuring characteristics of medical diagnostic X-ray equipment" (Medicaldiag- tics), IEC 61674.2012 "Ionization chambers and/or semiconductors used in X-ray diagnostic imaging of medical electrical equipment Code of Practice). This specification is published for the first time. (20~150)kV X-ray Beam Half Value Layer Calibration Specification

1 Scope

This specification is applicable to the calibration of direct-reading half-value tomometers for diagnostic radiology (20~150) kV X-rays, and its measurement range The circumference shall not be less than 14mmAl.

2 References

This specification references the following documents. GB/T 19629-2005 Ionization chambers and (or) semi-conductors used in X-ray diagnostic imaging of medical electrical equipment Conductor Detector Dosimeter IEC 61267.2005 Radiation conditions for use in measuring characteristics of medical diagnostic X-ray equipment (Medicaldi- teristics) IEC 61674.2012 Ionization chambers and/or semiconductor detectors used in X-ray diagnostic imaging of medical electrical equipment For dated references, only the dated version applies to this specification; for undated references document, its latest version (including all amendments) applies to this specification.

3 Terminology and units of measurement

3.1 Terminology 3.1.1 Half-value Layer Half-valueLayer; HVL Placed on the path through which the X-ray radiation beam passes, the given value required to reduce the value of the air kerma rate by half The thickness of the material. Usually expressed by the thickness of the aluminum sheet. 3.2 Units of measurement 3.2.1 The unit of air kerma rate. Ge (ray) per second, the symbol is Gy/s. 3.2.2 Unit of half-value layer. millimeter aluminum, the symbol is mmAl.

4 Overview

Direct-reading half-value layer meter (hereinafter referred to as half-value layer meter) is an instrument used to measure the quality of X-ray radiation, usually by It is composed of several detectors, filtering and measuring units (or electrometers) with different thicknesses covering the detectors, through By measuring the air kerma rate passing through additional filters of different thicknesses, the calculated initial air kerma rate is reduced by half When the thickness of the filter is obtained, the value of the half-value layer is obtained. ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 2017-2022_English be delivered?

Answer: Upon your order, we will start to translate JJF 2017-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 2017-2022_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 2017-2022_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.