Page 111 - Sterilization Training Manual

SEC SIGNATURE DIR
In 2005 SEC started testing the SEC Signature DIR on EtO Sterilization Chambers
Ò The DIR analyzer quantifies EtO and water vapor densities by measuring infrared light absorption at certain wavelengths.
Ò The DIR passively samples chamber gas. A recirculation line is an optimal mounting location since the recirculation system generally contains a representative sample of the gas mix in the chamber and the turbulence in the gas stream helps maximize the refresh rate of the gas sample in the DIR’s measuring chamber.
Ò To maintain accurate H2O readings in the presence of other gases (N2,O2,EO) pressure compensation and optical compensation must be enabled for the H2O channel.
ETO
& H2O MONITOR