GeoVision GV-VD120D Manuale utente
GeoVisionInc. 1 RevisionDate:11/9/2011
Solving IR Reflection and
Improving Night View
Article ID: GV15-11-11-09-c
Release Date: 11/09/2011
Applied to
Vandal Proof IP Dome
(GV-VD120D/121D/122D/123D, GV-VD220D/221D/222D/223D,
GV-VD320D/321D/322D/323D)
Fixed IP Dome (GV-FD120D/220D/320D)
Summary
If you are having difficulty getting clear live views under low light conditions with your Vandal
Proof IP Dome or the Fixed IP Dome, this is likely due to IR reflections inside the camera. To
solve the IR reflection problem, you can choose to disable the IR Light function if there is
sufficient lighting on the installation site. If you do not have enough lighting on the installation
site, proceed to identify the possible causes and adopt the solutions to reduce IR reflection
and improve the quality of live view.
GeoVisionInc. 2 RevisionDate:11/9/2011
Troubleshooting flowchart
Solving IR Reflection and Improving Night view
Without external
IR illuminator /
sufficient lights
Keep IR Light
function enabled
With external IR
illuminator /
sufficient lights
Disable IR Light
function
See
Solution 4 (page 13)
See
Solution 6 (page 22)
Is my live view foggy?
Are there round spots or
water droplets on my live
view?
Are there light spots or
glass reflection on my live
view?
No
No
No
YES
YES
YES
See
Solution 3 (page 10),
Solution 5 (page 16)
See
Solution 1 (page 5),
Solution 2 (page 8)
Is there a circle of spots
on my live view? YES
GeoVisionInc. 3 RevisionDate:11/9/2011
Disabling the IR
By default, the IR LEDs turn on when there are insufficient lights. To avoid IR reflection inside
the camera, you can disable the IR function if there are sufficient lights or an IR illuminator
installed on the installation site. The disabling the IR function is available on the camera with
firmware version 1.07 or later.
Note: The minimum amount of light (in lux) required in night mode and the corresponding
live image are detailed below.
For GV-VD120D/121D/122D/123D, GV-FD120D: approximate 4 lux.
For GV-FD220D/320D, GV-VD220D/221D/222D/223D,
GV-VD320D/321D/322D/323D: approximate 8 lux.
GeoVisionInc. 4 RevisionDate:11/9/2011
To disable the IR:
On the Web interface, select Streaming 1 under Video Settings, select Off for IR Light and
click Apply.
GeoVisionInc. 5 RevisionDate:11/9/2011
Possible Cause and Solution
If there are no sufficient sources of light, proceed to identify the causes and adopt the
suggested solution.
1. Are the screws properly tightened?
Spots in a curve
Live view with loosen screws showing spots in a curve
Vandal Proof IP Dome
(GV-VD120D/121D/122D/123D, GV-VD220D/221D/222D/223D,
GV-VD320D/321D/322D/323D)
Tightly secure the 4 screws inside the housing cover
GeoVisionInc. 6 RevisionDate:11/9/2011
Tightly secure the 4 screws on the housing cover
Fixed IP Dome (GV-FD120D/220D/320D)
Tightly secure the 4 screws inside the housing cover
GeoVisionInc. 7 RevisionDate:11/9/2011
Tightly secure the 2 screws on the housing cover
Solution:
Check the inside and outside of the housing cover and be sure the screws are properly
tightened.
GeoVisionInc. 8 RevisionDate:11/9/2011
2. Is the rubber band around the lens loosened?
The rubber band around the lens prevents IR LED light from reflecting inside the camera
cover. If your rubber band is loosened or not properly fitted, some light may reflect inside the
cover and affect the quality of the live view.
Live view with displaced rubber band showing a circle of spots
Top View: The rubber band is out of position
Side View: The rubber band is out of position.
GeoVisionInc. 9 RevisionDate:11/9/2011
Top view: The rubber band is at its normal position.
Side View: The rubber band is at its normal position.
Solution:
Check if the rubber band is properly fitted and completely attached to the camera cover when
the cover is attached. If your rubber band is still loose after your adjustment, contact the
vendor or local distributor for replacement.
GeoVisionInc. 10 RevisionDate:11/9/2011
3. Is my cover dirty?
For a foggy live view, your cover may be dirty from dusts, finger prints or debris.
Note: If your camera is installed in a dusty or moist environment, your camera may need
regular maintenance.
Live view through a dirty cover appears foggy
Cover with dusts
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3
Questo manuale è adatto per i seguenti modelli
14
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