| 摘要 |
PROBLEM TO BE SOLVED: To provide a flow measuring device that secures safety and performs zero value correction when needed, and can maintain precision. SOLUTION: A channel is closed down by an opening and closing unit 2 when a flow obtained by measurement using a flow measurement unit 3 is within a first prescribed range, namely a non-zero flow, and output of speed of fluid measured by the flow measurement unit 3 after the channel is closed down by the opening and closing unit 2 is corrected so that the flow of the flow measurement unit 3 becomes zero, thus accurately performing zero value correction without being affected by pressure. More specifically, when it can be determined that no gas is being used and in the case of the first prescribed range, where a flow of a non-zero value has been measured, zero value correction is performed, thus hardly causing zero value correction or performing repeated zero value correction depending on equipment, thereby performing zero value correction depending on the equipment. COPYRIGHT: (C)2010,JPO&INPIT
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