2
1
Equipment Installation
1.1
Installation Preparation
⚫
Installation Preparation
：
◼
5 meter long tape for distance measurement on site
◼
DC12V adapter, used with camera
◼
Some cable lines
⚫
Product appearance
BF3221
：
BF5421:
Blackbody
：
Note: the recorded installation guidance video "Dahua indoor human body temperature
measurement product installation video (BF3221)", which adopts tripod mode, is applicable to
portable indoor installation guidance reference, and other fixed installation needs to be installed in
strict accordance with the specified height, distance and other requirements.
The PPT version of installation guidance video, web operation guidance and guidance
document should be obtained from the regional delivery supervisor. In the future, it will be
synchronized in the group on the mobile app.
1.2
Installation Distance
focal length
Distance between
blackbody and
camera
Distance between human
forehead and camera
Width at the best
distance of temperature
measurement
BF3221
（
3.5mm
）
2m
2m
(NO Blackbody2m)
1.5m
BF3221
（
7mm
）
3m
3m
(NO Blackbody2m)
1.3m
BF5421
（
13mm
）
3m
3m
(NO Blackbody2m)
1.5m
The distance from the forehead to the camera and the distance from the blackbody to the camera have the
best temperature measurement accuracy. Taking BF3221 (7mm) as an example, the distance between
•
Blackbody radiant surface
