| 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 second gas flow-rate measuring means 102 from a low flow-rate region to an upper, specific flow-rate region, and stops the drive in the higher 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 while a gas flow rate is up to a specific flow- rate region exceeding the boundary between a high flow-rate region and a low flow-rate region and stops or suppresses power supply to the second gas flow-rate measuring means 102 when the gas flow rate exceeds the above specific flow-rate region.</p> |
