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JJG 370-2019 English PDF

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Upon your order, we will start to translate JJG 370-2019_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.

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Yes. The purchased PDF of JJG 370-2019_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

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Q: Should I purchase the latest version JJG 370-2019?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 370-2019 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$699.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 370-2019: On-line Oscillation Tube Liquid Density Meters
Status: Valid

JJG 370: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 370-2019	699	Add to Cart	5 days	On-line Oscillation Tube Liquid Density Meters	Valid
JJG 370-2007	RFQ	ASK	5 days	Verification Regulation for Vibration Tube Liquid Density Meter on Line	Obsolete
JJG 370-1984	359	Add to Cart	3 days	Verification Regulation of Working Vibration Tube Liquid Density Meter	Obsolete

Similar standards

GB/T 36126 JJG 475 GB/T 1885 JJG 159 JJG 166 JJG 126

Basic data

Standard ID: JJG 370-2019 (JJG370-2019)
Description (Translated English): On-line Oscillation Tube Liquid Density Meters
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A53
Classification of International Standard: 17.060
Word Count Estimation: 32,392
Date of Issue: 2019
Date of Implementation: 2020-03-31
Issuing agency(ies): State Administration for Market Regulation

JJG 370-2019: On-line Oscillation Tube Liquid Density Meters

---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 Online Vibrating Tube Liquid Density Meter) National Metrological Verification Regulations of the People's Republic of China Online vibrating tube liquid density meter 2019-12-31 released 2020-03-31 Implementation Issued by the State Administration for Market Regulation Verification Regulations for Online Vibrating Tube Liquid Density Meter Replace JJG 370-2007 Focal point. National Technical Committee of Quality Density Measurement Main drafting unit. China Institute of Metrology Participated in the drafting. National Oil and Gas Large Flow Metering Station Emerson Process Control Co., Ltd. Xinjiang Uygur Autonomous Region Metrology and Testing Institute This regulation entrusts the National Quality Density Measurement Technical Committee to be responsible for the interpretation Main drafter. Li Zhanhong (China Institute of Metrology) Participating drafters. Xu Changhong (China Institute of Metrology) Ruan Zengrong (National Oil and Gas Large Flow Metering Station) Huibin Meng (Emerson Process Control Co., Ltd.) Li Xiaoyu (Xinjiang Uygur Autonomous Region Metrology and Testing Research Institute)

Introduction (Ⅲ) 1 scope (1) 2 Reference documents (1) 3 Terms and measurement units (1) 3.1 Term (1) 3.2 Unit of measurement(1) 4 Overview (1) 4.1 Working principle (1) 4.2 Composition (1) 4.3 Output signal (2) 5 Measurement performance requirements (2) 5.1 Accuracy level (2) 5.2 Indication error (2) 5.3 Repeatability (2) 6 General technical requirements (2) 6.1 Random files (2) 6.2 Nameplate and identification (2) 6.3 Appearance (2) 6.4 Protection function(3) 7 Measuring instrument control (3) 7.1 Verification conditions (3) 7.2 Installation of online density meter (4) 7.3 Verification items (5) 7.4 Verification method (5) 7.5 Verification procedure (5) 7.6 Calculation method (6) 7.7 Processing of verification results (8) 8 Verification period (8) Appendix A Pressure Density Bottle Method (9) Appendix B Standard Liquid Density Meter Method (11) Appendix C Table of Oil Density and Temperature Coefficient (12) Appendix D (18~26)℃ Sodium tungstate aqueous solution density temperature coefficient table (13) Appendix E (0~40)℃ Pure Water Density Table (excluding air) (14) Appendix F Table of Oil Compression Factor F (16) Appendix G Table of Capillary Constants of Sodium Tungstate Aqueous Solution (18) Appendix H Water Compression Coefficient Fw Table (19) Appendix I Air density calculation formula (20) Appendix J Verification record format of online vibrating liquid density meter (21) Appendix K Inner page format of verification certificate/verification result notification (24)

Introduction

JJF1002-2010 "Rules for the Compilation of National Metrological Verification Regulations", JJF1001-2011 "General Metrological Terms and The "Definitions" together constitute the basic series of specifications that support the revision of this regulation. Compared with the JJG 370-2007 "Online Vibrating Tube Liquid Density Meter", this regulation is mainly The technical changes are as follows. ---Added the introduction part; ---The original formula (2) was deleted, and the fitting equation was improved (see 4.1); ---Revised the accuracy level requirements of Table 1 of the original regulations; ---Improved the maximum allowable error and repeatability (see 5.1 and 5.3); --- Deleted the original schematic part; ---Improved the classification of verification methods; ---Improved the calculation of indication error (see 7.7.2 and 7.7.3); ---Improved the regulations for the calculation of fitting coefficients; ---The format of the inner page of the verification certificate has been improved. The release of previous versions of this regulation. JJG 370-2007 "Online Vibrating Tube Liquid Density Meter"; JJG 370-1984 "Working Vibration Tube Liquid Density Meter (Trial)". Verification Regulations for Online Vibrating Tube Liquid Density Meter

1 Scope

This regulation is applicable to the first verification, subsequent verification and in-use inspection of the online vibrating tube liquid density meter.

2 Reference documents

This regulation refers to the following documents. JJG 86 standard glass float gauge JJF1229 Terms and definitions of mass density measurement For dated reference documents, only the dated version is applicable to this regulation; for undated reference documents, The latest version (including all amendments) is applicable to this regulation.

3 Terms and units of measurement

3.1 Term 3.1.1 Temperature correction coefficient test Under different temperature conditions, flow a liquid of known density through an online vibrating tube liquid densitometer and measure its output Value to obtain the temperature correction coefficient of the density meter. 3.1.2 Static pressure correction coefficient test pressurecoefficientstest Under constant temperature and different pressure conditions, pass the liquid of known density into the online vibrating tube liquid densitometer and measure The output value of the test to obtain the pressure correction coefficient of the density meter. 3.2 Unit of measurement The measurement units used are. kilogram/m3 (kg/m3), gram/cm3 (g/cm3), degrees Celsius (℃), megapascals (MPa), microseconds (μs).

4 overview

4.1 Working principle The online vibrating tube liquid density meter (hereinafter referred to as the online density meter) uses the density of the liquid flowing through the vibrating tube to change The principle that the resonant frequency of the vibrating tube changes due to change, by measuring the resonant frequency signal and other related physical quantities An instrument to obtain the density of a liquid. The density value of the online density meter can be expressed as. 4.2 Composition The online density meter is generally composed of a sensor and a display instrument. Usually the sensor includes a vibration tube, an excitation, and a vibration pickup system. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJG 370-2019_English be delivered?

Answer: Upon your order, we will start to translate JJG 370-2019_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 JJG 370-2019_English with my colleagues?

Answer: Yes. The purchased PDF of JJG 370-2019_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 370-2019?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 370-2019 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.