Elmo QNW4000 - Manual (Page 10)

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This camera is provided with Day/Night function that can detect the brightness of the objects and
automatically switch the color mode / black-and-white mode according to the detected brightness.
This function allows the output of ordinary colored images for the outdoor monitoring during
daylight and the output of black-and-white images for the night monitoring with a lack of sufficient
light volume. Therefore, even at night, this camera can provide monitoring through images with
little noise.
Furthermore, since this function raises the sensitivity in the infrared area, even a dark object can be
imaged more clearly at night when a commercially available infrared lamp is used together. To
make this function enabled, set the Day/Night switch on the rear panel to "ON."
When the Day/Night switch is set to "OFF," the camera operates as an ordinary color camera even
at night.
When the Day/Night switch is set to "ON" and the object becomes gradually brighter as the time
passes like dawn, it may take time to switch from the black-and-white mode to the color mode. As a
result, the image taken in the early morning may be in black and white. However, note that this is
not a malfunction.
The Day/Night function controls the mode switching between the color mode and the black-and-
white mode according to the signal level.
Since the signal level varies depending on the camera settings to shoot the object, the timing of
Day/Night switching varies accordingly.
When more than one screen is displayed by the controller or the like, the Day/Night mode may vary
depending on the camera shooting conditions even if the brightness is the same.
Day/Night FUNCTION