Campbell CCFC Instruction Manual - page 78
CCFC Field Camera
68
12.8.4.5.2 Lens Defroster Control
The Lens Defroster Control controls the operation of the lens defroster. When
enabled, the camera only turns on the lens defroster if the internal temperature
is below the threshold setting. The temperature threshold values are limited
between -40°C and +25°C.
If Always On is selected, the heater will be on whenever the temperature is
below the threshold and the camera is not in a low power state.
Figure 12-44 Lens Defroster Control: Always On
If Prior to Capture is selected, the camera will wake up prior to any of the
Timed Capture schedules and turn on the heater, if the temperature is below the
threshold settings. This feature does not work in Motion Detect or External
Trigger modes.
This is useful for a remote site that may be prone to riming and frost. A camera
that is setup to take hourly pictures can be configured to turn on the defroster
several minutes prior to the scheduled picture to defrost the lens using the
Prior to Capture drop down option and inputting a value in minutes.
Figure 12-45 Lens Defroster Control: Prior to Capture