Selection Criteria for High-Quality Products of Electromagnetic Flow Meters

Abstract: The information on the selection criteria for high-quality products of electromagnetic flowmeters is provided by the excellent manufacturers of flowmeters and flowmeters. 1. General In order to ensure the reliable application of electromagnetic flowmeters in the urban water supply industry, promote the development of electromagnetic flowmeter technology, and enable manufacturers to meet production standards in a targeted manner, so as to make urban water supply metering meters more standardized and achieve good benefits, special . More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the selection criteria for electromagnetic flowmeters. 1. General In order to ensure the reliable application of electromagnetic flowmeters in the urban water supply industry, promote the development of electromagnetic flowmeter technology, and enable manufacturers to meet production standards in a targeted manner, so as to make urban water supply metering meters more standardized and achieve good benefits, especially formulate the industry“Selection criteria for high-quality products of electromagnetic flowmeters”(hereinafter referred to as: this evaluation standard) 2. The basic project composition of the evaluation standard This evaluation standard is mainly composed of four major parts, namely: 2. 1. Manufacturers must first obtain the qualifications for participating in the evaluation.“4”Item 2, 2 Basic parameters, performance, function, inspection and test of electromagnetic flowmeter 2, 3 Manufacturer's comprehensive management level: quality system compliance inspection items and scores 2, 4 Water flow standard equipment——That is, the ability and level of water flow verification for electromagnetic flowmeters. In order to make the evaluation more specific, practical and concise, this evaluation standard subdivides the above four basic items into several sub-items. 3. Importance classification of sub-items and evaluation rules 3.1 Importance of sub-items Items with veto power: those with unqualified items will not be allowed to participate in the evaluation. Category B: Generally important projects: Projects are more valued, but those who fail to pass three or more (excluding three) are not allowed to participate in the evaluation. Category C: General project: failure of this type of project will not affect the evaluation, but it must be improved within a time limit or proved to meet the practical requirements. 4. Qualifications and classifications 4.1 The applicant must have a valid business license issued by the industrial and commercial administration department. Class A 4 and 2 must have a valid manufacturing license for measuring instruments issued by the quality and technical supervision department. Class A 4 and 3 have a full range of electromagnetic flowmeters (DN15~3000) manufacturing and water flow verification equipment that can meet the needs of the urban water supply industry. Class A 4 and 4 electromagnetic flowmeters must comply with international standards ISO13359~1996 and machinery industry standards JB/T9248~1999 at the same time. Class A 4, 5 Reasonable and effective production organization and management system, perfect inspection and testing methods. Class B 5. Basic parameters, performance, functions, inspection items and classification of electromagnetic flowmeters (according to JB/T9248—1999 and ISO13359—1996 regulations) 5, 1 Completeness of caliber series: DN15~DN3000 total at least 30 specifications A class 5, 2 Working pressure: 0.6Mpa, 1.0Mpa, 1.6Mpa, 4.0Mpa C class 5, 3 Medium temperature: according to the lining material , the maximum medium temperature is 70°C~150°C Ambient temperature: sensor -25°C~+60°C Converter and integrated type are -10°C~+60°C Class C 5, 4 Accuracy:±0.5% (F.R) A class 5, 5 Upper limit flow velocity value range: 0.5~15m/s A class 5, 6 Structure type: split type, integrated type C class 5, 7 Explosion-proof requirements: mdⅡBT4 sensor protection class: IP68, IP65 A Class 5, 8 Converter function: full digital display, on-site or remote programming according to the menu Class A 5, 9 Bus and network functions: HART protocol, RS232, RS485 interface Class A 5, 10 Power supply: AC: 85~265V DC : +24V or battery B class 5, 11 Lining material, electrode material, protective flange, special cable for long-distance transmission optional B class 5, 12 Installation opening length dimension: in line with ISO13359~1996 class A 6, quality system compliance inspection Items and classifications 6.1 Quality system compliance project inspection will be carried out in accordance with the detailed rules of the quality system established by different manufacturers and according to the specific requirements of electromagnetic flowmeters. 6.2 The inspection of the quality system compliance items shall be assessed item by item according to the items listed in Table 1. 6.3 In the quality system compliance, those who are considered to meet the requirements and pass the inspection shall be recorded as“qualified”, the inspection items that do not meet the requirements are recorded as“Failed”6.4 After inspection, it is concluded that it is qualified or unqualified. 6.5 Quality system inspection items and evaluation methods, and judgment conclusions are shown in Attached Table 7. Water flow standard equipment——That is to say, the ability and level of real-flow verification of electromagnetic flowmeters 7, 1. There are standard equipment for water flow that are compatible with the electromagnetic flowmeters produced, and there is no need for external calibration of Class A. 7, 2 Those who have these equipment are electromagnetic flowmeters. Develop, develop, improve and provide conditions for users to recalibrate Class A attached table inspection and evaluation table serial number inspection sub-item name project code inspection content and requirements evaluation method, judgment conclusion Category 1 Product implementation standard 6.5.1 1. JB/T9248—19992.ISO13359—19963.GB/T9112—19884.JB/T15464—19955. JB/T9329—19996.JJG198—1994 Enterprises must have the above standards and be valid versions 1. Go to the manufacturer to check whether there is and investigate the actual situation 2. The standard version is complete, and the executor is“qualified”3. Those who have no standards or have standards but have not implemented them are“Failed”
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