Many information regarding interface, interface boards, sensors, and calibration sensor are presented in the datasheet. In this datasheet you can read explanation about power consumption, the de800 interface, oxygen, and applications.
The datasheet presents explanation regarding calibration, ext calibration sensor, sensor interface, and sensor. Here are taken from the datasheet:
The Oxymac 50, Elecdit and DE800 sensor interface boards Oxymac50 is a recently upgraded interface that offers similar are control and measurement devices for Honeywell’s range performance to the Elecdit board but operates from a 24 Vdc of dynamic highly accurate oxygen sensors. The ability of power supply. these sensors to operate without any reference gas makes them ideal for many applications including combustion and environmental control. Honeywell oxygen sensors using zirconia based sensing elements require external connection to an electronic measuring circuit to control sensor operation and signal The DE800 interface offers the features of the Oxymac50 but also contains the heating element power source.
Even more, this datasheet tells us information such as circuits, calibration sensor pump, oxygen sensors, and heating element.