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JB/T 9248-2015Electromagnetic flowmeters (English PDF)

电磁流量计

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Issued by

MIIT

Level / Type

Industry · Recommended

Issue date

October 10, 2015

Implementation date

March 1, 2016

Scope

JB/T 9248-2015 is the English-translated version of 电磁流量计.

JB/T 9248-2015 is the Chinese standard "Electromagnetic flowmeters". Its scope clause reads: This standard specifies the product structure and classification, basic parameters, technical requirements, test methods, inspection rules, marking, packaging and storage for electromagnetic flowmeters (hereinafter referred to as "flowmeter").

This standard is applicable to the electromagnetic flowmeters used for measuring the conducting liquid flow in closed pipeline. This standard is not applicable to plug-in electromagnetic flowmeters and the electromagnetic flowmeters used for measuring open channel flow. Its clauses include term and definition.

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Document preview — JB/T 9248-2015

National Standard of the People's Republic of China

Replacing: JB/T 9248-1999

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

Foreword i
1 Scope
2 Normative References
3 Term and Definition
4 Product Structure and Classification
4.1 Basic Structure
4.2 Classification
5 Basic Parameters
5.1 Nominal Drift Diameter
5.2 Connection Dimensions
5.3 Measuring Range of Flow
5.4 Accuracy Classes
5.5 Output Signals
5.6 Working Environment Temperature and Relative Humidity
5.7 Mechanical Vibration
5.8 Power Supply
5.9 Output Load Resistance
5.10 Temperature of To-be-tested Liquid
5.11 Rated Working Pressure
5.12 Length of Straight Tube Section
6 Technical Requirements
6.1 Requirements of Accuracy
6.2 Requirements of Influence Quantity
6.3 Other Requirements
6.4 Basic Functional Requirements for Intelligent Flowmeter
7 Test Methods
7.1 Test Conditions
7.2 Tests for Accuracy
7.3 Tests for Influence Quantities
7.4 Other Tests
7.5 Basic Function Tests of Intelligent Flowmeter
8 Inspection Rules
8.1 Delivery Inspection
8.2 Type Inspection
8.3 Sampling Scheme and Judgment Rules
9 Marking, Packaging and Storage
9.1 Marking
9.2 Packaging
9.3 Storage
Bibliography

1 Scope

This standard specifies the product structure and classification, basic parameters, technical requirements, test methods, inspection rules, marking, packaging and storage for electromagnetic flowmeters (hereinafter referred to as "flowmeter").

This standard is applicable to the electromagnetic flowmeters used for measuring the conducting liquid flow in closed pipeline.

This standard is not applicable to plug-in electromagnetic flowmeters and the electromagnetic flowmeters used for measuring open channel flow.

2 Normative References

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 191-2008 Packaging—Pictorial Marking for Handling of Goods

GB/T 2829-2002 Sampling Procedures and Tables for Periodic Inspection by Attributes (Apply to Inspection of Process Stability)

GB 3836 (all parts) Explosive Atmospheres

GB 4208-2008 Degrees of Protection Provided by Enclosure (IP Code)

GB/T 9112-2010 Types and Parameters for Steel Pipe Flanges

GB/T 13384-2008 General Specifications for Packing of Mechanical and Electrical Product

GB/T 17626.2 Electromagnetic Compatibility(EMC)—Testing and Measurement Techniques—Electrostatic Discharge Immunity Test

GB/T 17626.3 Electromagnetic Compatibility-Testing and Measurement Techniques—Radiated Radio-frequency Electromagnetic Field Immunity Test

GB/T 17626.4 Electromagnetic Compatibility—Testing and Measurement Techniques-Electrical Fast Transient/Burst Immunity Test

GB/T 17626.5 Electromagetic Compatibility—Testing and Measurement Techniques—Surge (Impact) Immunity Test

GB/T 17626.8 Electromagetic Compatibility-Testing and Measurement Techniques-Power Frequency Magnetic Field Immunity Test

GB/T 17626.11 Electromagnetic Compatibility—Testing and Measurement Techniques—Voltage Dips, Short Interruptions and Voltage Variations Immunity Tests

GB/T 18271.3 Process Measurement and Control Devices—General Methods and Procedures for Evaluating Performance—Part 3: Tests for the Effects of Influence Quantities

GB/T 18659-2002 Measurement of fluid flow in closed conduits—Methods of evaluating the performance of electromagnetic flow-meters for liquids

GB/T 20729-2006 Measurement of conductive liquid flow in closed conduits—Flanged electromagnetic flowmeters—Overall length

GB/T 25474-2010 Values of nominal size for industrial process measurement and control instruments

GB/T 25480-2010 Basic environmental conditions and testing methods for transportation and storage of instruments

3 Term and Definition

For the purposes of this document, the terms and definitions given in GB/T 18659-2002 and those below apply.

3.1 constant of primary device

an inherent factor of sensor, equivalent to the electromotive force of signal of a certain field current, or the field current producing a certain electromotive force, at 1m/s flow rate. It may serve as the ratio of electromotive force of signal to reference signal of magnetic field.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Cited by

Similar standards

GB/T 18659-2023

Editions of JB/T 9248

Edition	Title	Revision	Status
JB/T 9248-2015	Electromagnetic flowmeters	current edition	Current
JB/T 9248-1999	Electromagnetic flowmeters	previous edition	Superseded

This page sells the current edition, JB/T 9248-2015. Earlier editions are listed for reference only.

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