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JJG 448-2005 English PDF

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JJG 448-2005: Verification regulation of ultrasonic power meters for watt level
Status: Valid

JJG 448: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJG 448-2005English339 Add to Cart 3 days [Need to translate] Verification regulation of ultrasonic power meters for watt level Valid JJG 448-2005
JJG 448-1993English199 Add to Cart 2 days [Need to translate] Verification Regulation of Ultrasonic Power Meters for Watt Level Obsolete JJG 448-1993
JJG 448-1986EnglishRFQ ASK 3 days [Need to translate] (Chinese Industry Standard) Obsolete JJG 448-1986

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Basic data

Standard ID JJG 448-2005 (JJG448-2005)
Description (Translated English) Verification regulation of ultrasonic power meters for watt level
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A59
Word Count Estimation 13,178
Date of Issue 2005-04-28
Date of Implementation 2005-10-28
Older Standard (superseded by this standard) JJG 448-1993
Quoted Standard GB/T 7966-1987; GB/T 14368-1993
Issuing agency(ies) State Administration of Quality Supervision, Inspection and Quarantine
Summary This standard applies to ultrasonic power (0. 5 ~ 20) W within the scope of watts ultrasonic power meter initial verification, testing and use of follow-up inspection.

JJG 448-2005: Verification regulation of ultrasonic power meters for 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.
Verification regulation of ultrasonic power meters for watt level National Metrology Verification Regulations of the People's Republic Watt level ultrasonic power meter Released on.2005-04-28 2005-10-28 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Replacing JJG 448-1993 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on April 28,.2005, and since.2005. It will take effect on October 28 of the year. Focal Point. National Acoustic Metrology Technical Committee Drafted by. China Institute of Metrology Guangdong Institute of Metrology Beijing Institute of Metrology and Measurement Science This procedure entrusts the National Acoustic Metrology Technical Committee to explain Drafters of this procedure. Zhu Yan (China Institute of Metrology) Bian Wenping (China Institute of Metrology) Xu Yuezhen (Guangdong Institute of Metrology) He Wei (Beijing Institute of Metrology and Measurement Science) Li Minyi (Guangdong Institute of Metrology)

table of Contents

1 Scope (1) 2 Citations (1) 3 Overview (1) 4 Metrology performance requirements (1) 4.1 Ultrasonic power measurement range (1) 4.2 Frequency range (1) 4.3 Maximum allowable error (1) 5 General technical requirements (1) 5.1 Appearance (1) 5.2 Nameplate, logo and instruction manual (1) 6 measuring instrument control (2) 6.1 Verification conditions (2) 6.2 Verification project (3) 6.3 Verification method (3) 6.4 Processing of verification results (4) 6.5 verification period (4) Appendix A Watt-level Ultrasonic Power Meter Verification Certificate Inner Page Format (5) Appendix B Watt level ultrasonic power meter verification result notice page format (6) Appendix C Example of Evaluation of Uncertainty (7) Watt level ultrasonic power meter verification procedure

1 Scope

This procedure is applicable to the first verification and after the watt-level ultrasonic power meter with ultrasonic power in the range of (0.5~20)W. Continued verification and inspection in use.

2 Citations

This procedure refers to the following documents. GB/T 7966-1987 "Measurement of ultrasonic sound power in the frequency range of (0.5~10) MHz" GB/T 14368-1993 "Standard ultrasonic power source" When using this procedure, care should be taken to use the current valid version of the above cited documents.

3 Overview

The Watt-level ultrasonic power meter is a portable measuring instrument for measuring the ultrasonic output sound power, usually using radiation force. Principle, a measurement system consisting mainly of a load cell, a reflective target, a muffler sink, etc., measuring the radiation in the ultrasonic field Force, according to the force conversion formula to obtain the corresponding average ultrasonic power.

4 Metrological performance requirements

4.1 Ultrasonic power measurement range Ultrasonic power measurement range. (0.5~20)W. 4.2 Frequency range Frequency range. (0.5~10)MHz. 4.3 Maximum allowable error Maximum allowable error. ±10%.

5 General technical requirements

5.1 Appearance 5.1.1 The surface of the casing should be smooth and smooth, and there should be no appearance damage that affects the accuracy of the instrument. 5.1.2 The switch adjustment button (or screw) should be complete and the operation is effective. 5.1.3 External wires, plugs and sockets should be safe and secure, reliable and free from looseness. 5.2 Nameplate, logo and instruction manual 5.2.1 Watt level ultrasonic power meter shall have the following clear and durable signs 1) the name of the manufacturer; 2) Model, name and factory number of the product. 5.2.2 Parts not used by the operator shall be protected by sealing or marking to avoid affecting the level of the super The accuracy of the sound power meter.

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