JVC VN-685U - Manual (Page 55)

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M B/W Mode This sets the function to switch from Color to B&W mode.
Color : Always be in Color mode.
Black & White : Always be in B&W mode.
Auto Low,Auto Mid,Auto High
: This item automatically switches between Color Mode
and B&W Mode when the luminance meets defined
conditions for over 30 seconds. Select the sensitivity from
three options.
Memo :
To ensure a successful B&W/Color switching
● If the [B/W Mode] item is set to AAuto Low, Auto Mid, Auto HighB, the
B&W/Color setting can be switched according to the brightness of the
object, but the condition of illumination and field angle may make this
impossible. To be absolutely certain of B&W/Color switching,
connecting external sensor to alarm input cable of this camera and
setting alarm action of B&W mode is recommended.
IR Preset AF When switching the Color mode to B&W mode, the type of light source may
cause the focus to be dislocated. This is because the B&W mode is
sensitive to both visible light and near-infrared light. When this happens,
set this item to
AOnB to focus automatically.
On : Enabled.
Off : Disabled.
Light This item sets the illumination of the object during B&W mode.
Normal : Select this for normal illumination.
IR : Select this when using infrared illumination.
Memo :
● If AIRB is set under normal sunlight or fluorescent lighting, the camera
will not switch normally from Color to B&W mode.