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JJG 2050-2022 English PDF

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JJG 2050-2022: Measuring Instruments for Ultrasonic Power
Status: Valid

JJG 2050: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJG 2050-2022	English	249	Add to Cart	3 days [Need to translate]	Measuring Instruments for Ultrasonic Power	Valid	JJG 2050-2022
JJG 2050-1990	English	239	Add to Cart	3 days [Need to translate]	Verification Scheme of Measuring Instruments for Ultrasonic Power	Obsolete	JJG 2050-1990

Standard similar to JJG 2050-2022

JJF 2051 JJF 2052 JJF 2050

Basic data

Standard ID	JJG 2050-2022 (JJG2050-2022)
Description (Translated English)	Measuring Instruments for Ultrasonic Power
Sector / Industry	Metrology & Measurement Industry Standard
Word Count Estimation	11,174
Date of Issue	2022-06-28
Date of Implementation	2022-12-28
Issuing agency(ies)	State Administration for Market Regulation

JJG 2050-2022: Measuring Instruments for Ultrasonic Power

---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.
Measuring Instruments for Ultrasonic Power National Metrology Verification System Table of the People's Republic of China Ultrasonic power meter Released on 2022-06-28 2022-12-28 Implementation Released by the State Administration for Market Regulation Ultrasonic Power Measuring Instrument Verification System Table for Ultrasonic Power Replace JJG 2050-1990 Responsible unit. National Acoustic Metrology Technical Committee Drafting unit. China Institute of Metrology Guangdong Institute of Metrology The verification system table is entrusted to the National Acoustic Metrology Technical Committee to be responsible for the interpretation The drafter of this verification system table. Xing Guangzhen (National Institute of Metrology) Yan Zhu (National Institute of Metrology) Li Minyi (Guangdong Institute of Metrology) Chen Shenli (Guangdong Institute of Metrology) Yang Ping (National Institute of Metrology)

Introduction (Ⅱ) 1 Scope(1) 2 Ultrasonic Power Measurement Benchmark(1) 2.1 Milliwatt ultrasonic power reference device and sub-reference device (radiation force balance method) (1) 2.2 Watt-level ultrasonic power reference device and sub-reference device (radiation force balance method) (1) 2.3 Watt-level ultrasonic power reference device (buoyancy change calorimetry) (1) 3 Ultrasonic power measurement standards (2) 3.1 Milliwatt-level and watt-level ultrasonic power standard devices (2) 3.2 Milliwatt-level, watt-level ultrasonic power source standard device (2) 3.3 Ultrasonic power meter standard device (3) 4 Ultrasonic Power Working Measuring Instruments (3) 5 Table block diagram of ultrasonic power measuring instrument verification system (3)

Introduction

This verification system table is compiled according to JJF1104-2003 "National Metrology Verification System Table Compilation Rules". This verification system table replaces JJG 2050-1990 "Ultrasonic Power Measuring Instruments". Compatible with JJG 2050-1990 The main technical changes are as follows. --- Modified the description of the frequency range and uncertainty of the milliwatt-level ultrasonic power reference and sub-reference device, and the frequency The range (0.5~10) MHz is changed to (0.5~25) MHz; the uncertainty is changed from Urel=5% (k=2) to Urel=3.5% (k=2); ---Modified the description of the uncertainty of the watt-level ultrasonic power reference and sub-reference device, the uncertainty is determined by Urel= 5% (k=2) is changed to Urel=3.5% (k=2); ---Newly added a watt-level ultrasonic power reference device based on the buoyancy variation calorimetry method, the frequency range is (0.5~ 5) MHz, ultrasonic power range is (20~500) W, measurement uncertainty Urel=5% (k=2). The previous version releases of this verification system table are as follows. ---JJG 2050-1990. Ultrasonic Power Measuring Instrument Verification System Table

1 Scope

This verification system table is applicable to the value transfer of ultrasonic power measuring instruments of 1mW~500W, and specifies the ultrasonic Power reference, sub-reference, value transfer procedure and value transfer between ultrasonic power measurement standards and working measuring instruments Method and measurement uncertainties. When carrying out calibration, it can also be used as the basis for traceability of quantity value.

2 Ultrasonic Power Measurement Benchmark

Ultrasonic power measurement standard is used to reproduce and save the value of ultrasonic power from 1mW to 500W, and The rate measurement standard is used to transmit the value to the working measuring instrument to ensure the accuracy and uniformity of the domestic ultrasonic power value. The unit of ultrasonic power magnitude is watts (W). Ultrasonic power measurement benchmarks include milliwatt-level ultrasonic power reference devices and sub-reference devices using the radiation force balance method [Ultrasonic power range is (1~500)mW], the watt-level ultrasonic power reference device and auxiliary base using the radiation force balance method The standard device [ultrasonic power range is (0.5~20) W], the watt-level ultrasonic power reference device using the buoyancy variation calorimetry method Set [Ultrasonic power range is (20~500)W]. Between the milliwatt-level ultrasonic power reference device and the sub-reference device, and between the watt-level ultrasonic power reference device and the sub-reference device The magnitude of the ultrasonic power is directly compared with a standard ultrasonic transducer. 2.1 Milliwatt-level ultrasonic power reference device and sub-reference device (radiation force balance method) Based on the radiation force balance method, the milliwatt-level ultrasonic power reference device and the auxiliary reference device are composed of standard ultrasonic transducers, precision Dense electronic microbalance, anechoic water tank, reflection or absorption target, suspension system, ultrasonic signal generator, power amplification It is composed of main supporting equipment such as device, impedance matching device and high-frequency voltage measuring device. Measuring Standards by the Radiation Force Balance Method The output of the ultrasonic transducer is used to reproduce the magnitude of the ultrasonic power. In the (0.5~25) MHz frequency range, the ultrasonic power The power range is (1~500)mW, and the measurement uncertainty Urel=3.5% (k=2). The transmission of the ultrasonic power value adopts the direct measurement method, and the milliwatt-level ultrasonic power benchmark based on the radiation force balance method On the device and the auxiliary reference device, the output power of the standard ultrasonic transducer radiation is directly measured, and it is compared with the measurement standard device Compare the measured values. 2.2 Watt-level ultrasonic power reference device and sub-reference device (radiation force balance method) Based on the radiation force balance method, the watt-level ultrasonic power reference device and the sub-reference device are composed of standard ultrasonic transducers, precision Electronic microbalance, anechoic water tank, reflection or absorption target, suspension system, ultrasonic signal generator, power amplifier, Impedance matching device and high-frequency voltage measuring device and other main supporting equipment. Measurement of Standard Ultrasound by Radiation Force Balance The output of the transducer is used to reproduce the magnitude of the ultrasonic power. In the (0.5~10) MHz frequency range, the ultrasonic power range The range is (0.5~20)W, and the measurement uncertainty Urel=3.5% (k=2). The transmission of the ultrasonic power value adopts the direct measurement method, and the watt-level ultrasonic power reference device based on the radiation force balance method Set it on the auxiliary reference device, directly measure the output power of the standard ultrasonic transducer radiation, and measure it with the measurement standard device worthy of comparison. 2.3 watt-level ultrasonic power reference device (buoyancy change calorimetry)

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