ref= unique identifier of the O2-sensor whose measured partial pressure is transfered (mandatory)
The element indicates the measured inspired oxygen partial pressure, given as a real number in the SI units Pascal. Normally, for safety reasons more than one O2-sensor is built-in in a rebreather. Therefore, it is mandatory to indicate the respective sensor which transfered the oxygen partial pressure via the attribute. For the same reason <measuredpo2> may occur repeatedly for each built-in sensor inside a <waypoint>.
<waypoint>
(see also <waypoint>)
<waypoint> <depth>...</depth> <divetime>...</divetime> <!-- sensor 1 is measuring an oxygen partial pressure of 1.22 bar --> <measuredpo2 ref="o2sensor_1">1.22e5</measuredpo2> <!-- sensor 2 is measuring an oxygen partial pressure of 1.23 bar --> <measuredpo2 ref="o2sendor_2">1.23e5</measuredpo2> <!-- sensor 3 is measuring an oxygen partial pressure of 1.21 bar --> <measuredpo2 ref="o2sensor_3">1.21e5</measuredpo2> <!-- here other elements for this waypoint --> </waypoint>