Indicates the — more or less arbitrarily chosen — threshold for the oxygen partial pressure, when the oxygen fraction of this breathing gas starts to be poisonous. The value is given as a real number, normally it ranges between 1.4 bar and 1.7 bar. UDDF uses only SI units, therefore the parameter is given in Pascal.
Stands inside the <mix> section. If <maximumpo2> is given, <maximumoperationdepth> must not be given, because out of the first the maximum operation depth (MOD) can be calculated.
<mix>
<maximumoperationdepth>, <mix>
(see also <mix>, and <gasdefinitions>)
<!-- maximum PO2 1.4 bar -->
<maximumpo2>1.4e5</maximumpo2>