An image reading system is provide, which includes a reading apparatus for reading an original, and a host computer. The gas distributor includes a gas inlet and a gas outlet head in communication with the gas inlet for receiving a flow of gas from the gas inlet. A local coverage message specifying equipments determined as present in the microcell coverage zone is generated. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way. Most preferably, the protective agent is 6PPD. When the configuration is set or changed, setting verification means verifies whether or not a total of ensured bands associated with each adapter is within an allowable range.