Gas meter scale is good or bad judgment

Abstract: the gas meter scale is good or bad judgment information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Gas meter is good or bad judgment is not from unilateral to think, first of all, from the manufacturer can have part of the judgment, then another part is the accuracy of the instrument after zui, that is simple, the ancients cloud is whether a cat can catch mice. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a gas meter scale is good or bad judgment article details. Gas meter is good or bad judgment is not from unilateral to think, first of all, from the manufacturer can have part of the judgment, then another part is the accuracy of the instrument after zui, that is simple, the ancients cloud no matter & other; A cat can catch mice is good cat & throughout; , so zui final judgment criteria for instrument is the accuracy of the results of ratio is very big, but small make up today to say here is that no matter from the manufacturer or from quality is good, but the result is not allowed, this time to think about whether at the time of detection is affected! Error 1: the pipeline design is not reasonable known gas flowmeter is a kind of commonly used gas measuring instrument, mainly for gas, air, nitrogen, acetylene, phosgene, hydrogen gas, natural gas, nitrogen gas, liquefied petroleum gas measurement, etc. Common influence the outcome is not precise reason is the unreasonable pipeline design may cause large measurement error. Two parallel pipeline, when the head of the net gas, in charge of the manual valve closed. Gas flowmeter metering is normal, when in charge of the network also gas, manual valve is opened, as a result of the main gas by part for diffluence, can make the pressure drop inside the main line, makes the meter table after the pressure is less than the table before the pressure reversal of the flow meter, flow meter and cumulative flow, caused the double measurement. In order to avoid this kind of situation must install a check valve in front of the no. 1 meter. Error 2: high pressure low pressure regardless of a second is the measurement will be high voltage measurement of low pressure gas. Is to optimally suited to high pressure pipeline installation, and then through the voltage regulator, voltage regulator YongQiHu gas in low pressure pipeline, when the low pressure pipeline YongQiHu little gas, according to the gas state equation, the temperature there is not much difference, low pressure pipe flow of small flow back to the high pressure pipe will be smaller, and even the flow short of flowmeter of the flow. Meter does not count. So will cause large measurement error. Error 3: improper installation gas meter installation right helps to improve the measurement accuracy of flowmeter and prolong service life. Flow meter installed on the pipeline, should guarantee the meter on the table of threaded hole and screw hole of pipe flange alignment, guarantee the parallelism of the flange, to avoid flowmeter under other external forces, to prevent the table body stress deformation of the flowmeter. Open flow timing, should first before opening the valve, then slowly open the valve, make the gas meter has pressure, avoid the effect of air hammer, impact deformation, the gas flow meter rotor flowmeter is jammed. These are measuring the impact of external factors, of course, the influence of itself, such as gas meter, which due to the rough parts, assembly accuracy and wear, the decreased flow meter itself precision is not high or precision, the measurement of product quantity is not accurate. So choose flow timing should choose high precision. At present our country asked to work by the precision of flowmeter for & plusmn; 0. 5%, and in use should be according to the provisions of periodic verification. This depends on the manufacturer's responsible attitude, and is the critical of the buyer! Factors influencing the gas meter measuring accuracy analysis: through the analysis of field measurement results, combined with traditional laboratory test experience, factors that affect measuring precision summarized as the following: ( 1) On-site verification environment compared with laboratory, field verification when the signal propagation attenuation amplitude, instability, and interference detection problem such as severe and the effects of flow field, need to take some measures to minimize the effects of the external environment factors. ( 2) For small gas supply companies, the pressure pipeline itself, as a general rule, be 0. 6 to 1. 0MPa. Metal pipe used in the laboratory standard device for the speed of sound is bigger, the attenuation of amplitude in ultrasonic transducer clamp can't detect fluid signal in the line affect the test result. Through the experiment, therefore, to find an alternative to metal pipes as transducer pipe installation, become another problem to be solved in the system.

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