| 摘要 |
PROBLEM TO BE SOLVED: To provide an acoustic velocity measuring device capable of appropriately representing properties of each high-pressure standard gas that is not conventionally regarded as a use object, and ensuring rational measurement for measurement target conditions different in temperature and pressure.SOLUTION: A sample gas acoustic velocity measuring device comprises: a sample gas circulation passage 1; sample-gas-flow-rate control means 7 setting a flow rate of sample gas g flowing in the sample gas circulation passage 1 to a target flow rate; sample-gas-temperature control means 8 setting a temperature to a target temperature; sample-gas-pressure control means 9 setting a pressure to a target pressure, an acoustic-velocity-measurement pipe portion 2 in which sample-gas-acoustic-velocity measurement means 3 is provided being provided within the sample gas circulation passage 1, heat insulation means 10 keeping a temperature of the acoustic-velocity-measurement pipe portion 2 to a target temperature being provided in the sample gas circulation passage 1; and a measurement-condition input unit 11a to which the target flow rate, the target temperature, and the target pressure are input.SELECTED DRAWING: Figure 1 |
