Self referring calibration sequence for CAP60

"Self-referring" words are not allowed in the Metrology world. Metrology science is applied to measuring devices and measured variables : both produce a numeric value related to a measuring range. Gas diluters are used in the metrological world but their product is not a greatness but a pure number : the ratio between two flows. Multiplying both flows by whichever value the ratio don't change, and this is why this article has a sense.