| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a vortex flow rate type gas meter that can cope with a long-term use by reducing power consumption. SOLUTION: A drive control means 103 corresponds to the flow-rate region of a gas flow and drives a first gas flow-rate measuring means 102 from a specific low flow-rate region to an upper, high flow-rate region, and stops the drive in the lower region. Also, a power supply control means 104 supplies power also to a first gas flow-rate measuring means 101 and the second gas flow-rate measuring means 102 in a flow-rate region from the above specific flow-rate region to the lower drive-enable limit flow-rate region of the first gas flow-rate measuring means 101 and stops or suppresses power supply to the first gas flow-rate measuring means 101 when the gas flow rate region becomes equal to or less than the above specific flow-rate region.</p> |
