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JJF 1830-2020 English PDF

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US$589.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1830-2020: Calibration Specification for DC Magnetic Properties Measuring Instruments for Magnetically Soft Materials
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1830-2020	589	Add to Cart	5 days	Calibration Specification for DC Magnetic Properties Measuring Instruments for Magnetically Soft Materials	Valid

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Basic data

Standard ID: JJF 1830-2020 (JJF1830-2020)
Description (Translated English): Calibration Specification for DC Magnetic Properties Measuring Instruments for Magnetically Soft Materials
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A55
Classification of International Standard: 17.220
Word Count Estimation: 27,280
Date of Issue: 2020
Date of Implementation: 2020-04-17
Issuing agency(ies): State Administration for Market Regulation

JJF 1830-2020: Calibration Specification for DC Magnetic Properties Measuring Instruments for Magnetically Soft Materials

---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 DC magnetic characteristic measuring instrument of soft magnetic materials) National Metrology Technical Specifications of the People's Republic of China Calibration specification for DC magnetic property measuring instrument for soft magnetic materials 2020-01-17 released 2020-04-17 implementation Issued by the State Administration for Market Regulation DC magnetic properties of soft magnetic materials Measuring instrument calibration specification Focal point. National Electromagnetic Metrology Technical Committee Main drafting unit. China Institute of Metrology Participated in the drafting unit. Zhejiang Institute of Metrology Hunan Institute of Metrology and Inspection Ningbo Institute of Metrology and Testing Shanghai Institute of Metrology and Testing Technology This specification entrusts the National Electromagnetic Metrology Technical Committee to be responsible for interpretation The main drafters of this specification. Gong Wenjie China Institute of Metrology He Jian China Institute of Metrology Participating drafters. Lin Anli China Institute of Metrology Yu Zhishu Zhejiang Institute of Metrology Xu Yu Hunan Institute of Metrology and Testing Wang Yimin Ningbo Institute of Metrology and Testing Wang Wei Shanghai Institute of Metrology and Testing Technology

Introduction (Ⅱ) 1 scope (1) 2 Reference documents (1) 3 Terms and measurement units (1) 3.1 Magnetic field inhomogeneity of magnetometer (1) 4 Overview (1) 5 Measurement characteristics (2) 5.1 Primary current I (2) 5.2 Magnetic flux Φ (2) 5.3 Detecting coil constant NS (2) 5.4 Magnetic field inhomogeneity of magnetometer δ (3) 5.5 Magnetic characteristic parameters (3) 6 Calibration conditions (3) 6.1 Environmental conditions (3) 6.2 Measurement standards and other equipment (3) 7 Calibration items and calibration methods (4) 7.1 Calibration items (4) 7.2 Calibration method (4) 8 Calibration result expression (8) 9 Recheck interval (8) Appendix A Example of Uncertainty Evaluation of Indication Error of Primary Current, Magnetic Flux and Magnetic Characteristic Parameters (9) Appendix B The original record format of the calibration of the DC magnetic property measuring instrument for soft magnetic materials (16) Appendix C Internal page format of calibration certificate (19)

Introduction

JJF 1001-2011 "General Metrology Terms and Definitions", JJF 1059.1-2012 "Measuring Uncertainty Evaluation and Representation” and JJF 1071-2010 “Rules for the Compilation of National Metrology and Calibration Specifications” together constitute the foundation supporting this specification Series specifications. This specification refers to JJG317 "Trial Verification Regulations for Magnetic Flux Meters" and JJG354 "Trial Standard Samples of Soft Magnetic Materials" Verification Regulations, JJG407 Trial Verification Regulations for Pure Iron Standard Samples for Electrical Engineering, JJF 1013 Common Names for Magnetic Metrology Terms and Definitions (Trial)", JJF 1094 "Characteristic Evaluation of Measuring Instruments", JJF 1587-2016 "Digital Multipurpose Table Calibration Specification" and GB/T 13012-2008 "Measurement Method of DC Magnetic Properties of Soft Magnetic Materials". This specification is released for the first time. Calibration specification for DC magnetic property measuring instrument for soft magnetic materials

1 Scope

This specification is applicable to the calibration of DC magnetic characteristic measuring instruments for soft magnetic materials using the ring sample method or the A-type permeance method (hereinafter referred to as the permeameter method). The upper limit of the magnetic field strength of the ring sample method is 10kA/m; the magnetic field strength range of the magnetometer method is (1~200)kA/m.

2 Reference documents

This specification refers to the following documents. JJG317 Flux Meter Trial Verification Regulation JJG354 Trial Verification Regulations for Standard Samples of Soft Magnetic Materials JJG407 Electrician pure iron standard sample trial verification regulation JJF 1013 Commonly Used Terms and Definitions in Magnetic Metrology (Trial) JJF 1094 Evaluation of Characteristics of Measuring Instruments JJF 1587-2016 Calibration Specification for Digital Multimeter GB/T 13012-2008 Measurement method for DC magnetic properties of soft magnetic materials 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

3.1 Magnetic field inhomogeneity of magnetometer The absolute value of the relative deviation between the magnetic field intensity in a certain area near the center of the magnetometer solenoid and the magnetic field intensity at the center.

4 overview

The DC magnetic characteristic measuring instrument for soft magnetic materials adopts the ring sample method or the permeability meter method to measure the DC magnetic characteristics of soft magnetic materials. Dedicated instrument for performance parameters. For the ring sample method, the magnetic field strength is obtained by measuring the primary current, which is mainly suitable for magnetic Measurement of field strength below 10kA/m. For the permeance method, the magnetic The field detection system measures the magnetic field strength and is used to measure the magnetic field strength in the range of (1~200) kA/m. The basic principle of the DC magnetic characteristic measuring instrument for soft magnetic materials with ring sample method is shown in Figure 1.Its magnetization device includes straight Current source, current measuring device and primary winding. The sample is magnetized by the primary winding and measured by the current measuring device Measure the primary current, calculate the magnetic field strength, and measure the magnetic flux density of the sample through a flux meter connected to the secondary winding. Advance And get the saturation magnetic flux density, remanence, coercivity, initial permeability and maximum permeability. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1830-2020_English be delivered?

Answer: Upon your order, we will start to translate JJF 1830-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 1830-2020_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1830-2020_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.