Home Cart Quotation About-Us
www.ChineseStandard.net
SEARCH

JJG 868-2024 English PDF

Q: How long will the true-PDF of English version of JJG 868-2024 be delivered?

Upon your order, we will start to translate JJG 868-2024_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.

Q: Can I share the purchased PDF of JJG 868-2024_English with my colleagues?

Yes. The purchased PDF of JJG 868-2024_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Q: Does the price include tax/VAT?

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). Avoidance of Double Taxation Agreements (DTAs) between Singapore and 100+ Countries: https://www.iras.gov.sg/taxes/international-tax

Q: Do you accept my currency other than USD?

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.

Q: Should I purchase the latest version JJG 868-2024?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 868-2024 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.

US$359.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 868-2024: Verification Regulation of Standard Ultrasonic Power Sources for Milli Watt-level
Status: Valid

JJG 868: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 868-2024	359	Add to Cart	4 days	Verification Regulation of Standard Ultrasonic Power Sources for Milli Watt-level	Valid
JJG 868-1994	219	Add to Cart	3 days	Verification Regulation of Standard ultrasonic sources for Milliwattlevel

Basic data

Standard ID: JJG 868-2024 (JJG868-2024)
Description (Translated English): Verification Regulation of Standard Ultrasonic Power Sources for Milli Watt-level
Sector / Industry: Metrology & Measurement Industry Standard
Word Count Estimation: 17,122
Date of Issue: 2024-10-19
Date of Implementation: 2025-04-19
Issuing agency(ies): State Administration for Market Regulation

JJG 868-2024: Verification Regulation of Standard Ultrasonic Power Sources for Milli Watt-level

---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 Verification Regulations of the People's Republic of China Verification procedures for milliwatt standard ultrasonic power sources MiliWatt-level Released on 2024-10-19 2025-04-19 Implementation The State Administration for Market Regulation issued Verification procedures for milliwatt standard ultrasonic power sources Replace JJG 868-1994 Responsible unit. National Acoustic Metrology Technical Committee Drafting unit. China Institute of Metrology This regulation is entrusted to the National Acoustic Metrology Technical Committee for interpretation. Drafters of this Regulation. Zhu Yan (China Institute of Metrology) Xing Guangzhen (China National Institute of Metrology) Tian Qi (China National Institute of Metrology)

Introduction (II) 1 Scope(1) 2 References(1) 3 Terminology and units of measurement (1) 3.1 Units of measurement(1) 3.2 Terms and definitions (1) 4 Overview(2) 5 Metrological performance requirements (2) 5.1 Insulation resistance(2) 5.2 Operating frequency(2) 5.3 Ultrasonic output power (2) 5.4 Linearity deviation(2) 6 General technical requirements (2) 6.1 Logo(2) 6.2 Appearance and power supply (2) 7 Measuring instrument control (3) 7.1 Verification conditions (3) 7.2 Verification Items (4) 7.3 Verification methods (4) 7.3.1 General technical requirements (4) 7.3.2 Insulation resistance (4) 7.3.3 Ultrasonic output power (4) 7.3.4 Operating frequency (6) 7.3.5 Linearity deviation (6) 7.4 Processing of test results (6) 7.5 Verification cycle (6) Appendix A Format of the inner pages of the verification certificate (7) Appendix B Format of the inner pages of the verification result notification (8) Appendix C Examples of Evaluation of Measurement Uncertainty (9)

Introduction

JJF1001-2011 "General metrological terms and definitions", JJF1002-2010 "National metrological verification procedures The JJF1059.1-2012 "Evaluation and Expression of Uncertainty in Measurement" together constitute the basis for the formulation of this regulation. Series specifications. This regulation replaces JJG 868-1994 "Certification Regulation for Milliwatt Standard Ultrasonic Source". The main technical changes are. a) Added terms and measurement units; b) Change the ultrasonic power source frequency range from (0.5~10) MHz to (0.5~25) MHz; c) Added verification methods for operating frequency stability and linear deviation; d) Added uncertainty assessment. The previous versions of this regulation are as follows. ---JJG 868-1994. Verification procedures for milliwatt standard ultrasonic power sources

1 Scope

This regulation is applicable to the frequency range of (0.5~25) MHz and the ultrasonic power range of (1~500) mW. Initial calibration, subsequent calibration and in-use inspection of milliwatt standard ultrasonic power sources.

2 References

This specification refers to the following documents. JJF1001 General metrological terms and definitions JJF1034-2020 Acoustic Metrology Terms and Definitions JJF1059.1 Evaluation and Expression of Measurement Uncertainty GB/T 3102.7 Acoustic quantities and units GB/T 3947-1996 Acoustic terminology GB/T 7966 Acoustic ultrasonic power measurement - Radiation force balance method and its requirements IEC 61161 Ultrasonics - Ultrasonic power measurement - Radiation force balance method and performance requirements For any referenced document with a date, only the version with the date is applicable to this Regulation; for any referenced document without a date, The latest version (including all amendments) shall apply to this regulation.

3 Terminology and units of measurement

3.1 Units of measurement This regulation adopts the quantities and units specified in GB/T 3102.7. 3.2 Terms and Definitions The following terms and definitions defined in JJF1001, JJF1034-2020 and GB/T 3947-1996 apply to this Regulations. Under specified conditions and in a specified medium (preferably water), the ultrasonic transducer emits a The average ultrasonic power. Symbol. P. Note. The unit of ultrasonic output power is watt (W). 3.2.2 Ultrasonic transducer Convert other forms of energy into ultrasonic signals or energy, or convert ultrasonic signals or energy into other forms of energy Quantity of devices. 3.2.3 Radiation conductivity The ratio of the acoustic output power to the square of the RMS value of the transducer input voltage. Used to characterize the electroacoustic conversion of ultrasonic transducers. characteristics. ......

Image

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJG 868-2024_English be delivered?

Answer: Upon your order, we will start to translate JJG 868-2024_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 JJG 868-2024_English with my colleagues?

Answer: Yes. The purchased PDF of JJG 868-2024_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.

Question 5: Should I purchase the latest version JJG 868-2024?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 868-2024 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.