How to install the gas mass flowmeter is standardized

QZL series gas mass flowmeters are suitable for precise measurement of gas quality. It converts the measured gas mass flow into the corresponding gas volume flow under standard conditions or gas mass flow under standard conditions. Gas mass flowmeter has the characteristics of high precision, long life, good repeatability, wide flow range, stable and reliable, etc. The flow measurement of gas is carried out by the method of testing gas quality. The standard installation of the gas mass flowmeter provides strong technical support for the user department in the follow-up management. The following specific requirements are put forward for the construction unit, and the verification effect has been very good after many years. 1. Flow meter with 4 ~ 20mA output, pulse output. 2. The GPRS remote transmission equipment of the flowmeter needs to have a pulse input, 4 ~ 20mA input. 3. With power lightning protection and signal lightning protection (4 ~ 20mA). 4. The requirements for the instrument cabinet of the flowmeter are: the cabinet is equipped with UPS power supply, air switch and socket, GPRS communication device, intelligent vortex flowmeter converter, etc. are installed in a centralized manner with locks. 5. The stability of the instrument cabinet requires a cement pier base, the protection level of the instrument cabinet is suitable for outdoor use, the top of the cabinet has a heat insulation layer to prevent direct sunlight, and the cabinet has the function of splashing water. 6. There must be enough straight pipe section on one side of the surface well to facilitate the detection, comparison and follow-up management of the smart vortex flowmeter. 7. The front end of the designed flow meter must have a straight pipe section at least 10 times the nominal diameter (10DN), and the rear end must have a straight pipe section greater than 5DN to ensure accurate measurement. 8. The flowmeter should be installed strictly according to the instructions. After installation, the grounding should be measured, and the grounding resistance should be below 10Ω. The equipotential connection line uses multi-strand copper bundle wires, and the cable size must be greater than or equal to 16mm2; the instrument ground wire uses multi-strand copper bundle wires, and the cable size must be greater than or equal to 6mm2. For grounding standards, see GB50343-2009 'Technical Specifications for Lightning Protection of Building Electronic Information Systems'.

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