User Manual
www.ydlidar.com Copyright 2015-2018 YDLIDAR Team
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FIG 17 YDLIDAR F4PRO COORDINATE ANGLE DEFINITION
USE CAUTION
Ambient temperature requirements
When the ambient temperature of the F4PRO is too high or too low, it will affect the accuracy of the
distance measuring system, and may damage the structure of the scanning system and reduce the
service life of the radar. Avoid use in high temperature (>40 degrees Celsius) and low temperature
(<0 degrees Celsius) conditions.
Ambient lighting
The ideal working environment for the F4PRO is indoor. Indoor lighting (including no light) does
not affect the F4PRO's operation. However, avoid using a strong light source (such as a high-power
laser) to directly illuminate the F4PRO's vision system.
If you need to use it outdoors, please avoid the F4PRO's vision system directly facing the sun, which
may cause permanent damage to the vision system's photosensitive chip, thus invalidating the
ranging.
If the F4PRO scans outdoors, the ranging results can be disturbed by strong sunlight.
Power supply requirements
During the development process, because the drive current of the USB interface of each platform or
the USB interface of the computer may be too low to drive the F4PRO, the F4PRO needs to be
connected to the external power supply of +5V through the USB_PWR interface of the USB
interface board. It is not recommended to use mobile phone charging power supply because some
brands have larger voltage ripples.