Ricoh MP C3004 Field Service Manual page 1342

7. Detailed Descriptions
The following diagram shows the image of the area covered by the sensor on the floor.
Basically, the sensor detects the presence of an operator coming to the machine from the distance of
approximately 1.8 m. However, it may also detect the presence of someone walking across the area.
The infrared sensor's detection performance is influenced by the ambient temperature. The sensing
distance increases in a lower ambient temperature and decreases in a higher ambient temperature.
As a guide, the sensing distance starts decreasing from 1.8 m when the ambient temperature starts rising
to 28 °C and above.
The sensor covers the area in front of the machine obliquely downward, detecting people's legs (around
their knees). Its sensing performance is influenced by the kind of clothes such people are wearing.
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