Patent ID: 9664656
Date: 2017-05-30
CPC Classifications: A61L,G01N,G05D

Claim:
1. A method for monitoring a concentration of a gas in an enclosed space, comprising: injecting said gas into said enclosed system using a gas injection system; measuring a parameter indicative of said gas concentration using a gas sensor; comparing said parameter with a predetermined limit value of said parameter using a microprocessor, and if said parameter is greater than said predetermined limit value then activating a shut-off of the gas injection system; continuously monitoring one of a hardware element, a software function and a control signal used to carry out the method to identify at least one fault in at least one of said hardware element, said software function and said control signal; and if a fault is detected activating said shut-off of the gas injection system; wherein said continuously monitoring step is carried out by one of a primary error detection module for identifying hardware faults and a secondary error detection module for identifying software and control faults; wherein each of said primary and secondary error detection modules are integrated with said microprocessor.