METHOD OF CONTROLLING MEASUREMENT OF OZONE CONCENTRATION

摘要

PURPOSE:To obtain an exact ozone concn. by regarding the disturbing gas generated from the test piece in a test chamber as ozone, measuring said gas, subtracting this value in an arithmetic circuit to ozone concn. zero, and generating the required ozone with said concn. as a start point. CONSTITUTION:A sample 20 is put into the constant temp. state at the time of a test prior to the test and the disturbing gas generated from the sample 20 is regarded as ozone and is measured 27. This value is determined as the first reference ozone concn. zero value. The air cleaned by a disturbing gas removing filter 2 is put into an ozone generator 9 in at such a rate at which the required ozone concn. is attained in the test chamber 1 on the basis of the zero value. The light energy of an ozone lamp 14 is controlled 29 and the test is carried out by feeding the generated ozone into the chamber 1. The air feed to the generator 9 is stopped after the specified time and the air path is changed to replace the air in the chamber 1 through a bypass 10. The disturbing gas in the air in the chamber 1 is regarded as ozone and is measured 27. The test is carried out with this value as the fresh ozone concn. zero value. The test under the exact ozone concn. which is not affected by the disturbing gas is executed by repeating this procedure >=1 times.