GB/T 38617-2020 English PDF

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GB/T 38617-2020: Industrial-process measurement and control instruments terminology - Level measuring instruments terminology
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 38617-2020	409	Add to Cart	4 days	Industrial-process measurement and control instruments terminology - Level measuring instruments terminology	Valid

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Basic data

Standard ID: GB/T 38617-2020 (GB/T38617-2020)
Description (Translated English): Industrial-process measurement and control instruments terminology - Level measuring instruments terminology
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: N12
Classification of International Standard: 25.040.40
Word Count Estimation: 22,298
Date of Issue: 2020-04-28
Date of Implementation: 2020-11-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
Summary: This standard specifies the terminology of level instruments for industrial process measurement and control. This standard applies to the formulation of level instrument product standards, the preparation of documents, the preparation of teaching materials and books, and the translation of documents.

GB/T 38617-2020: Industrial-process measurement and control instruments terminology - Level measuring instruments terminology

---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.
Industrial-process measurement and control instruments terminology--Level measuring instruments terminology ICS 25.040.40 N12 National Standards of People's Republic of China Industrial automation instrument terminology level instrument terminology 2020-04-28 release 2020-11-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the China National Machinery Industry Federation. This standard is under the jurisdiction of the National Industrial Process Measurement Control and Automation Standardization Technical Committee (SAC/TC124). This standard was drafted by. Shanghai Fanyi Technology Electronics Co., Ltd., Shanghai Miaoshengli Instrument Co., Ltd., Shanghai Industrial Automation Instrumentation Research Research Institute Co., Ltd., Shanghai Instrument Automatic Control System Inspection and Testing Co., Ltd., Chongqing Chuanyi Automation Co., Ltd., Beijing Guda Instrument Co., Ltd., Dandong Tongbo Electric (Group) Co., Ltd., Shanghai Miaodi Instrument Co., Ltd., Shanghai Xingshen Instrument Co., Ltd. The main drafters of this standard. Zheng Zhaokai, Li Jingwu, Zhao Guocheng, Cui Fuqiang, Zhu Qilin, Li Minghua, Wu Liying, Zhao Junjie, Wang Yang, Liu Di, Li Shaowen, Gao Shiping, Wang Jianing. Industrial automation instrument terminology level instrument terminology

1 Scope

This standard defines the terminology of level instruments for industrial process measurement and control. This standard is applicable to the formulation of product standards for level instruments, the preparation of documents, the preparation of textbooks and books, and the translation of documents.

2 Terminology

2.1 General terms 2.1.1 Level The interface position of two different phase media or immiscible liquid media. Note. It is usually expressed by the vertical distance between the interface and the reference surface.For applications where there is an angle of repose, the interface between the measured point and the reference surface is also used. To express the vertical distance between them. Levels in industrial processes include. liquid level (gas-liquid interface position), material level (gas-solid interface position), liquid-liquid interface, liquid-solid interface. The above definition also applies to a vacuum environment where there is no gas phase. 2.1.2 Level [measurement] instrument levelinstrument Device for measuring, displaying, alarming and controlling the material level. Note. Including level gauge and level switch. 2.1.3 Level meter (gauge) Level measuring instrument for continuous measurement of level. Note. Including the level gauge to measure the liquid level and the level gauge to measure the solid material. 2.1.4 Level switch levelswitch Level measuring instrument for fixed point (limit) type measurement of level. Note. Including the level switch to measure the liquid level and the level switch to measure the solid level. The digital signals include SPST, SPDT, DPDT, 0/1, 8/16mA, Namur≥2.6mA/≤0.6mA, DCPNP, DCNPN, frequency signal (high frequency/low frequency), solid state relay status output, etc. 2.1.5 Level Transmitter Level Transmitter It measures the continuous level signal and converts the level signal into a recognizable standard analog or communication signal output instrument. Note. Including liquid level transmitter for measuring liquid level, level transmitter for measuring solid material level. Common standard analog output signals are current output type and voltage output type. The communication methods between the instrument and the external system usually include HART, Modbus, Profibus, and FoundationBus. 2.1.6 Surface roughness The roughness of the surface of solid materials such as lumps, particles and powder. Note. The average diameter of particles is usually used to characterize. 2.1.7 Angle of repose The slope formed by the natural accumulation of solid materials. ......

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