FUJITSU CG-311 SERIES - Manual (Page 19)

En-17
FLICKERLESS (FL)
CAUTION:
This function is used under fluorescent light on
the power supply area with different frequency
from the camera scanning frequency.
Set the FL switch (#8 switch of DIP Switch) to
“OFF”, otherwise the flicker may occur.
(Factory setup is FL OFF.)
DAY/NIGHT MODE (D/N)
There are two modes of AUTO and HOLD in
this camera at Day/Night mode.
The Day/Night operation works automatically
according to the brightness of subject in AUTO
mode.
When you prefer to maintain current state,
HOLD mode may be used.
At #7 switch of DIP Switch
Left side : AUTO
Right side : HOLD
(Factory setup is AUTO mode.)
CAUTION:
When using this camera with IR light or light-
ing where the color temperature is 3000 k or
less, this camera shifts automatically to night
mode.
Under unfavorable conditions (strength or
angle of illumination) it can happen that hunt-
ing occurs.
The CG-311 has a special circuit to prevent such
kind of hunting problems.
If the camera detects a hunting condition, the
night mode is maintained for 30 minutes.
Every 30 minutes the camera checks automati-
cally whether the condition which caused hunt-
ing still exists and maintains if so for further 30
minutes.
To avoid this operation you have to adjust the
strength or the angle of the illumination.