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JJF 1708-2018 English PDF

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US$419.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1708-2018: On Line Calibration Specification for Coriolis Mass Flowmeters by Master Meter Method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1708-2018	419	Add to Cart	4 days	On Line Calibration Specification for Coriolis Mass Flowmeters by Master Meter Method	Valid

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Basic data

Standard ID: JJF 1708-2018 (JJF1708-2018)
Description (Translated English): On Line Calibration Specification for Coriolis Mass Flowmeters by Master Meter Method
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A53
Classification of International Standard: 17.120
Word Count Estimation: 18,163
Date of Issue: 2018-06-25
Date of Implementation: 2018-09-25
Quoted Standard: JJG 643-2003; JJG 1038-2008; JJF 1001-2011; JJF 1004-2004; GB/T 20728-2006
Regulation (derived from): State Administration of Markets, Announcement No. 13 of 2018
Issuing agency(ies): State Administration for Market Regulation
Summary: This standard applies to the on-line calibration of DN50 to DN300 Coriolis mass flowmeters for measuring full-tube liquid media in closed conduits.

JJF 1708-2018: On Line Calibration Specification for Coriolis Mass Flowmeters by Master Meter Method

---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.
On Line Calibration Specification for Coriolis Mass Flowmeters by Master Meter Method National Metrology Technical Specification of the People's Republic Standard gauge method Coriolis mass flowmeter Online calibration specification Published on.2018-06-25 2018-09-25 implementation State Administration of Markets issued Standard gauge method Coriolis mass flowmeter Online calibration specification Focal Point. National Flow Metering Technical Committee Liquid Flow Sub-Technical Committee Main drafting unit. National Water Meter Product Quality Supervision and Inspection Center (Ningbo) Sinopec Zhenhai Refining & Chemical Company Participated in the drafting unit. Chongqing Institute of Metrology and Quality Inspection Nanjing Tianti Automation Equipment Co., Ltd. Chengdu Andisheng Measurement Co., Ltd. This specification entrusts the National Flow Measurement Technical Committee Liquid Flow Sub-Technical Committee to explain The main drafters of this specification. Tang Simeng [National Water Meter Product Quality Supervision and Inspection Center (Ningbo)] Chen Lei (Sinopec Zhenhai Refining & Chemical Branch) Sun Mengxiang [National Water Meter Product Quality Supervision and Inspection Center (Ningbo)] Participate in the drafters. Li Xia (Chongqing Institute of Metrology and Quality Inspection) Wang Haiyong (Sinopec Zhenhai Refining & Chemical Branch) Tang Ping (Nanjing Tianti Automation Equipment Co., Ltd.) Zhong Rong (Chengdu Andisheng Measurement Co., Ltd.)

Introduction (II) 1 Scope (1) 2 References (1) 3 Terms and definitions (1) 3.1 Online calibration (1) 3.2 Coriolis mass flowmeter online calibration device (1) 3.3 Zero stability (1) 3.4 Flow Calibration Coefficient (1) 3.5 Pressure compensation (1) 4 Overview (1) 4.1 Coriolis mass flow meter (1) 4.2 Composition and characteristics of the flowmeter online calibration device (2) 5 Measurement characteristics (2) 5.1 indication error (2) 5.2 Repeatability (3) 6 Calibration conditions (3) 6.1 Environmental conditions (3) 6.2 Standard Flowmeters and Auxiliary Equipment (3) 7 Calibration items and calibration methods (3) 7.1 Calibration Project (3) 7.2 Calibration method (3) 8 indication error and repeatability calculation (4) 8.1 indication error (4) 8.2 Repeatability (5) 9 Calibration Results (6) 10 re-study interval (6) Appendix A Calibration Record Reference Format (7) Appendix B Calibration Certificate (Inside) Reference Format (8) Appendix C Working Principles and Usage of Online Devices (9) Appendix D Standard Table Method Coriolis Mass Flowmeter Online Calibration Uncertainty Evaluation Example (11)

Introduction

After the Coriolis mass flowmeter in use is disassembled and sent for re-installation, problems such as misalignment are likely to occur. Line calibration is a suitable method to solve the traceability of this type of flowmeter. The standard method used in this specification is One of them. This specification is based on the use of Coriolis mass flowmeters in China and the status of online calibration, refer to JJG643-2003 "Standard Table Method Flow Standard Device", combined with JJG1038-2008 "Colioli Mass Flowmeter" verification procedure The formulation of the line, the determination of the main technical indicators are also referred to implementation. In addition to the terms specifically defined in this specification, JJF 1001-2011 General Terms and Definitions and JJF 1004-2004 "Flow Terms Terms and Definitions" are applicable to this specification. According to JJF 1071-2010 “National Metrology Calibration Specification Writing Rules”, 5.9, this specification will show the value error and Repeatability is listed as a metrology feature and serves as the primary task of metrology calibration. This specification refers to the JJG643-2003 "Standard Table Method Flow Standard Device" to the measurement standard measurement performance Seek the requirements of JJG1038-2008 Coriolis Mass Flowmeter for the verification of environmental conditions. This specification is the first release. Standard gauge method Coriolis mass flowmeter Online calibration specification

1 Scope

This specification applies to the measurement of DN50~DN300 Coriolis mass flow in full pipe liquid media in closed pipes. Online calibration of the meter.

2 reference files

This specification refers to the following documents. JJG643-2003 standard table method flow standard device JJG1038-2008 Coriolis mass flowmeter JJF 1001-2011 General Measurement Terms and Definitions JJF 1004-2004 Flowmeter terminology and definition GB/T 20728-2006 Measurement of fluid flow in closed pipes Selection and installation of Coriolis flowmeters And usage guide For dated references, only dated versions apply to this specification; undated quotations The latest version (including all amendments) applies to this specification.

3 Terms and definitions

3.1 Online calibration onlinecalibration Determining the relationship between the magnitude indicated by the flowmeter under actual operating conditions and the corresponding magnitude reappeared by the standard A set of operations. 3.2 Coriolis mass flowmeter online calibration device onlinecalibrationdeviceofCoriolisMassFlowme- Ters An on-line calibration of Coriolis mass flow meters that provides accurate flow values and a mobile measurement system. 3.3 zero stability zerostability After the zero adjustment, when the medium in the flowmeter is stationary, the instantaneous mass flow of the flowmeter is indicated with time or ring. The degree of change in the condition of the environment is expressed by the absolute value of the instantaneous flow. 3.4 Flow calibration coefficient flowcalibrationfactor A correction factor that is set in order to reduce system errors in relation to mass flow measurement. 3.5 Pressure compensation pressurecompensation Correct the effect of working medium pressure on Coriolis mass flowmeter measurements. Note. When the calibration pressure of the standard instrument and the mass flow meter in the laboratory is inconsistent with the online calibration pressure, it should be The pressure correction factor is supplied for pressure compensation.

4 Overview

4.1 Coriolis mass flowmeter ......

Image

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1708-2018_English be delivered?

Answer: Upon your order, we will start to translate JJF 1708-2018_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 JJF 1708-2018_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1708-2018_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.