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在工业生产中,蒸汽流量的测量通常采用节流法,节流装置的设计是根据额定工况条件进行的。然而,实际运行工况往往偏离额定工况,特别是当蒸汽负荷波动较大时更是如此,这将给流量测量带来极大的误差。因此,必须进行流量示值的修正。一般由手算或以DDZ系列仪表构成自校正系统进行压力、温度校正。手算校正不仅不准确,而且费时、繁琐;而由DDZ系列仪表构成校正系
In industrial production, steam flow measurement is usually used throttle method, throttle device design is based on rated conditions. However, the actual operating conditions are often deviated from the rated conditions, especially when the steam load fluctuations are large, which will bring great error to the flow measurement. Therefore, the flow rate must be corrected. Usually calculated by hand or DDZ series instrument self-calibration system for pressure, temperature correction. Manual calculation is not only not accurate, but also time-consuming, cumbersome; and by the DDZ series of instruments constitute a correction system