| 摘要 |
<p>PROBLEM TO BE SOLVED: To surely grasp an abnormal state of a gas instrument and to improve the safety by sending a flow-rate signal from a gas flow rate sensor provided on the instrument and monitoring the gas flow rate of the gas instrument on a meter side. SOLUTION: When the gas instrument 6 begins to be used, a valve 11 is opened with the signal of a valve control part 12 and the gas instrument 6 starts operating. The instrument gas flow rate sensor 8 in the gas instrument 6 sends a signal regarding a used gas flow rate to a signal processing part 9 for the instrument and the gas flow rate is calculated and transmitted from a signal transmission part 10. The gas meter 13 receives the used flow rate of the gas instrument 6. This used flow rate is compared with a previously set maximum flow rate. If gas flows to the gas instrument 6 at an abnormal flow rate, a cutoff valve 17 is closed with a signal from a cutoff valve control part 18 of the gas meter 13 to stop the gas from flowing from the gas meter 13. Namely, the gas flow rate of the gas instrument 6 can be monitored on the side of the meter 13 by sending the flow rate signal from the instrument gas flow rate sensor 8 to the gas meter 13.</p> |
