30AXIS 221 - Event Configuration
Please see the online help 
for descriptions of each available option.
Camera Tampering
The camera tampering application generates an alarm whenever the camera is repositioned, or when the lens is covered, sprayed, or severely defocused.
You must also create an event, see How to set up a triggered event, on page 28, for the camera to send an alarm.
Settings
Minimum duration - This parameter sets the minimum tampering period, i.e. an alarm will not be triggered until this period has elapsed, even if the tampering conditions are otherwise met. This can help prevent false alarms for known conditions that affect the image.
Alarm for dark images - If the camera lens is sprayed or covered so that the camera live view becomes dark, it will not be possible to distinguish this situation from other situations where the same effect is seen, i.e., when lighting conditions change.
When this paramater is enabled, alarms will be generated for all cases where the lights are either dimmed or turned off, or if the lens is sprayed, covered, or severely defocused. If not enabled, no alarm will be sent.
After making these settings, click Save.