METHOD FOR MANAGING GAS RESIDUAL AMOUNT OF GAS SUPPLY SOURCE PROVIDED WITH PLURAL GAS CONTAINERS

摘要

PROBLEM TO BE SOLVED: To precisely manage a gas residual amount when a gas supply source provided with a plurality of gas containers is filled by a one side exchange system. SOLUTION: When a gas container 24 or 25 in the gas supply source 21 at a place 2 where gas is used becomes empty and is exchanged, a residual gas counter 51 is reset and a value obtained by subtracting a gas residual amount correction valueΔV from a full gas amount Vo in the residual gas counter 51 as the amount of residual gas in a gas automatic metering system 1. Since an error between the actual gas residual amount and a gas residual amount managed by a monitoring center side can be reduced, the residual amount can precisely be managed and a gas container exchange period can be predicted based on the management.