Actual flow circle calibrating apparatus for gas flowmeter and calibrating method thereof
A technology of gas flowmeter and verification device, which is applied in measurement device, liquid/fluid solid measurement, testing/calibration device, etc., can solve the problems of poor accuracy, high cost, high energy consumption, etc. Large and small effect
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[0027] in such as figure 1 In the embodiment 1 shown in Fig. 2, the gas flow meter real-flow cycle verification device includes a gas supply device, an air extraction device, a closed pipeline loop 1, and a fan 3, a temperature control device 5, and a test system 6 arranged in the pipeline loop 1. And the standard instrument system 7, the gas cylinder of the air supply device and the vacuum pump of the air extraction device (not shown in the figure) are respectively connected to the pipeline loop through an angle valve, and the angle valve is arranged on the pipeline loop at both ends of the standard instrument system 7, and on the pipeline loop 1 A large-capacity pressure equalizing container seal tank 2 is provided, and a vacuum gauge, a pressure gauge, and an air release valve are respectively provided on the pipeline circuit 1 and the seal tank 2, and the volume of the seal tank 2 is 60% of the total volume of the pipeline circuit. The volume of the sealed tank is 1.2 cubi...
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