Verification and Error of Large Caliber Oil Flowmeter

After more than a year of research and field experiments, the large-diameter oil flowmeter calibration error analyzer has finally been successfully developed. This analyzer has completely changed the traditional standard meter comparison verification method, and has increased the verification accuracy of large-caliber oil flowmeters from 2.5% to the current 0.5%. It has comprehensively improved the measurement level of flow meters and has high use value and Promotion prospects. Large-caliber oil flowmeter calibration error analyzer After more than a year of research and field experiments, it has finally been successfully developed a few days ago. This analyzer has completely changed the traditional standard meter comparison verification method, and has increased the verification accuracy of large-caliber oil flowmeters from 2.5% to the current 0.5%. It has comprehensively improved the measurement level of flow meters and has high use value and Promotion prospects. The large fuel meter verification device adopts the original vehicle-mounted mobile standard meter comparison method. This method relies on manual reading and counting. There are visual errors and time differences, and it is impossible to observe the instantaneous error of the standard meter and the tested meter in real time. The poorly inspected flowmeter can only issue the verification result, but can not take the adjustment measures. These large oil meters with over-tolerance can only be scrapped, causing a lot of waste. The technicians used the oil meter error analyzer to calibrate and calibrate 35 flowmeters on site. The method of comparison adopts traditional manual counting and calculation and automatic counting and calculation by analyzer. The method of verification adopts quantitative verification. In the process of verification, the cumulative flow of verification is set to 20 cubic meters. When the cumulative flow reaches the requirement, the counting is stopped. Through the comparison, it can be seen that there are leading and lagging phenomena in manual counting, which are mainly caused by time and vision. The maximum relative value of the two verification errors is 7.14%. Because the analyzer adopts synchronous counting and stopping, the time difference is microseconds, which can eliminate the time difference and visual error, and improve the verification accuracy by 0.02%. In addition, the technicians also adjusted the factory's 5 flowmeters with an error of more than 0.50% for the first time, 4 of which were corrected by the on-site adjustment accuracy corrector, and 1 was completed by replacing the fine gear. The errors of the 5 flowmeters were revised from -2.50%, -1.40%, -0.69%, 2.00%, and 1.50% before adjustment to 0.49%, -0.44%, -0.32%, 0.50%, and 0.50%, respectively, and reached the regulations. The accuracy requirement of 0.50%. During the adjustment process, by observing the instantaneous error change of the analyzer, it is judged whether the adjustment is excessive or under-compensated, so as to provide accurate data for the adjustment work. The oil meter calibration error analyzer improves the accuracy of the calibration, and can adjust the flowmeter with out-of-tolerance during the calibration process, so that the oil meter facing scrap is re-applied, saving a lot of money and achieving good economic benefits. . At present, technicians will carry out the verification work of indoor small-caliber oil flow meters with a diameter of 50 mm, a diameter of 40 mm and a diameter of 25 mm, making the instrument more widely usable and effective.