(summary) : The article from carry out, executive discharge measures relevant specification and regulations to set out, discussed discharge of development, application to measure the necessity of tool software, introduced a few discharge that at present home develops to measure tool software.
(keyword) : Discharge is measured, standard, calibrating regulations, tool software.

Overview
Well-known, discharge measures quantity and discharge to change send implement, temperature of the content sex of the fluid that be measured, job, actuating pressure is close together and relevant, present a complex function to concern, the design that this gives discharge appearance, examine, application brings very great difficulty, it is with the flowmeter of reduce expenditure type that applies extensively at present exemple, each flowmeter reduce expenditure diameter of starting a hole must be calculated, and this computation is very trival, the user is calculated complexly because of involving to the calibrating of use flowmeter also times feeling is difficult, so, national level " GB/T2624-93 discharge measures throttle unit to use the canal in orifice plate, nozzle and Wen Qiu to measure the fluid flow that is full of round canal " although already was released old, but carry out a circumstance and not ideal.
As the development of electronic technology, especially the computer enters discharge to measure a domain, a lot of complex, look be like the problem that solves hard to become very simple. Same with computational reduce expenditure diameter of starting a hole is exemple, an experienced technical personnel is calculated an orifice plate needs above a long time, but need 1 ～ 2 minutes only with computer computation.
Enter 21 centuries to come, the application of discharge computer had very great progress, it is mixed with high operation rate, large memory capacity, strong operation function have communication capacity and be welcomed generally, density of fluid of the computation when it should be realistic by the standard, pour out of coefficient, but coefficient of expansion measure flow must parameter, its accuracy is very tall. The level that discharge measures is in ceaseless and perfect, also had the technical medium that the standard that finish asks at the same time, revising the calibrating rules with regulations of old 2 appearance calibrating or new formulate so is must.
National quality was supervised on September 5, 2005 examine quarantine total bureau released People's Republic of China metric calibrating regulations " JJG1003-2005 discharge is accumulated calculate appearance " . " JJG1003-2005 " a of calibrating regulations important characteristic is a discharge accumulating calculate appearance and discharge to change send implement, the fluid that be measured is united in wedlock together cheek by jowl, the theoretical value of calibrating presses the mathematical model computation that gives out about national level completely to get. If do not have corresponding software support, calibrating regulations is impracticability. Accordingly, discharge accumulating calculates appearance calibrating software with respect to emerge as the times require.
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