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6 C3438M (5/07)
To manually correct defective pixels (refer to Figure 1 or Figure 2 on page 3):
1. Cover the lens completely. Make sure no light can enter the lens.
NOTE: The mechanical iris lens aperture does not completely block the light.
2. Press and hold button SW3 for one second. The camera will find and correct defective pixels.
NOTE: Any defective pixels that cannot be completely corrected may still appear.
3. Release button SW3.
4. Uncover the lens for normal camera operation.
DAY/NIGHT OPERATION
NOTE: This section only applies to DN modelcameras.
DN model cameras regularly check the brightness level of the field of view to determine when to
switch between day (color) and night (black-white) operation.
Actual brightness threshold levels are affected by camera angle, amount of zoom, field of view, lens,
and type of lighting. The switching process lasts from seven to 10 seconds.
Figure 3 and Table A show how the camera switches between color and black-white operation.
Figure 3. Threshold Switching Levels
NOTE: These switching thresholds are approximate. Actual thresholds are affected by lens type and
setting, field of view, scene, and other factors. Use the thresholds in Table A as a guide when
installing the unit.
Table A. Approximate Switching Thresholds
Color to B-W 1.5 lux ±1.0 lux
B-W to Color 3.0 lux ±1.0 lux
B-W
MODE
COLOR
MODE
FALLING LIGHT LEVEL
RISING LIGHT LEVEL
B-W
MODE
COLOR
MODE
1.5 lux
3.0 lux