GB/T 25845-2018 English PDF

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GB/T 25845-2018: Industrial γ-ray level meter
Status: Valid

GB/T 25845: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 25845-2018	199	Add to Cart	3 days	Industrial γ-ray level meter	Valid
GB/T 25845-2010	359	Add to Cart	3 days	Industrial γ-ray level meter	Obsolete

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GB/T 45132   GB/T 25156   GPON SFU   GB/T 25846   GB/T 25844   

Basic data

Standard ID: GB/T 25845-2018 (GB/T25845-2018)
Description (Translated English): Industrial ��-ray level meter
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G98
Classification of International Standard: 71.120;25.040.40;17.040.30
Word Count Estimation: 10,121
Date of Issue: 2018-12-28
Date of Implementation: 2019-11-01
Older Standard (superseded by this standard): GB/T 25845-2010
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 25845-2018: Industrial γ-ray level meter

---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 γ--ray level meter ICS 71.120; 25.040.40; 17.040.30 G98 National Standards of People's Republic of China Replace GB/T 25845-2010 Industrial gamma ray level gauge Published on.2018-12-28 2019-11-01 implementation State market supervision and administration China National Standardization Administration issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 25845-2010 "Industrial gamma ray level gauge", compared with GB/T 25845-2010, except for editorial repair The main technical changes changed are as follows. --- Increased integrated level gauge type [see 3.1b)]; ---Modified measurement range, from "100mm~6000mm" to "100mm~8000mm" (see 3.3.1,.2010 edition) 3.3.1); ---Modified the requirements for the switch output signal contact capacity (see 3.3.2,.2010 version 3.3.3); --- Added the "backlash setting" requirement in the "alarm function" (see 4.7); --- Added the protection level requirements for the enclosure in the "Protection Requirements" (see 4.15,.2010 edition 4.15); ---Modify the "test method" as "test and test method" (see Chapter 5, Chapter 5 of the.2010 edition); --- Deleted the contents of the "laboratory analog level device" [see.2010 edition 5.1e)]; --- Removed the content that is not applicable in the "Alarm Function Check" (see 5.8,.2010 Edition 5.8); --- Increased the test requirements for the "integrated level gauge remote commissioning" function (see 5.15); --- Added the "Decommissioning Treatment of Radioactive Sources" project (see 7.6). This standard is proposed and managed by the China Petroleum and Chemical Industry Federation. This standard was drafted. Tianhua Chemical Machinery and Automation Research and Design Institute Co., Ltd., chemical industry instrumentation quality supervision and inspection Xin, Gansu Junli Engineering Technology Co., Ltd. The main drafters of this standard. Zhao Wanxiang, Xue Feng, Liu Zhibin, Fang Jiang, Liu Yu, Zhang Xuewu. The previous versions of the standards replaced by this standard are. ---GB/T 25845-2010. Industrial gamma ray level gauge

1 Scope

This standard specifies the type, requirements, inspection and test methods, inspection rules and standards for industrial gamma ray level gauges (hereinafter referred to as level gauges). Zhi, instruction manual, packaging, transportation and storage. This standard applies to industrial gamma ray level gauges.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB 3836.1 Explosive atmosphere - Part 1. General requirements for equipment Explosive atmospheres - Part 2. Equipment protected by flameproof enclosure "d" GB 4075 Sealed radioactive sources General requirements and classification GB/T 4208-2017 enclosure protection grade (IP code) GB 8702 electromagnetic environment control limit GB/T 8993 Nuclear instrument environmental conditions and test methods GB/T 9969 General guidelines for the use of industrial products GB 11806 Safe Transport Procedure for Radioactive Material General technical conditions for GB/T 13384 mechanical and electrical product packaging GB 14052-1993 Radiation safety performance requirements for isotope meters installed on equipment

3 type

3.1 Structure type The level gauge is divided into two types of structure. a) Split type. consists of three parts. radioactive source, detector and converter; b) Integrated type. It consists of two parts. radioactive source and detector. Note. “Separate type” means that the detector and converter are separated, and the signal detected by the detector is sent to the converter for processing. "Integrated" means removing the converter and integrating the converter and detector. 3.2 Product Classification The level gauge is divided into switch type and continuous type. 3.3 parameters 3.3.1 Measurement range. 100mm~8000mm. 3.3.2 Output signal. a) The switch output signal is a dry contact signal, and the contact capacity should be no less than 20W; b) The continuous output signal is a DC4mA~DC20mA current signal; ......

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