Pelco IS150 User Manual download pdf (Page 22)

22 C3427M-C (10/07)

SW1-8: Day/Night Operation (DW models only)

NOTE: On CW models, SW1-8 is unused and does not affect camera operation.

DW 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. Use SW1-8 to set the general light levels at which

the camera will automatically switch.

Set to ON (dark) to use standard thresholds to switch between color and black-white operation. This is the

default.

Set to OFF (dusk) to use higher light thresholds to switch between color and 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.

NOTE: If the camera switches between day/night mode at least three consecutive times within a short

time period, the camera will remain in the last mode for 10 minutes. To override this 10 minute pause,

cycle the power or expose the camera to an extreme light level change (for example, from very dim light to

very bright light).

Figure 12 and Table B show how the camera switches between color and black-white operation for each

setting.

Figure 12. DW Models Threshold Switching Levels

NOTE: These switching thresholds are approximate and were measured using a 3.0 mm to 9.5 mm lens at

F1.0. Use the thresholds in Table B as a guide when installing the unit.

Table B. DW Models Switching Thresholds

Dark (ON) Dusk (OFF)

Color to B-W 1.0 lux 4.0 lux

B-W to Color 3.0 lux 7.0 lux

B-W

MODE

COLOR

MODE

FALLING LIGHT LEVEL

RISING LIGHT LEVEL

B-W

MODE

COLOR

MODE

DUSK

4.0 lux

7.0 lux

B-W

MODE

COLOR

MODE

FALLING LIGHT LEVEL

RISING LIGHT LEVEL

B-W

MODE

COLOR

MODE

DARK

1.0 lux

3.0 lux

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 31 32

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Pelco IS150 User Manual Page 22

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