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Surveillance camera FAQs
one. No image:
1. Check whether the power supply is connected and the power supply voltage meets the requirements (power supply error: DC12V+10%AC24V+5%);
2. BNC head or video cable is in good contact;
3. Does the lens auto iris open?
4. Video or DC driven auto iris lens control line is shorted to ground;
5. Check whether the video leaks cause the CCD board video to burn all the way;
two. Bad image quality:
1. Whether the lens is fingerprinted or dirty;
2. Whether the aperture is adjusted well;
3. Poor video cable contact;
4. Is there a problem with the electronic shutter or white balance settings?
5. Is the transmission distance too far?
6. Is the voltage normal?
7. Is there a source of interference nearby?
8. When installing in an elevator, ensure that the elevator is insulated from interference;
9. Lens focal length is not adjusted;
10. The CCD of the trigger is not flat;
11. Check whether the lens is a C-type interface or a CS-type interface. If the C-type interface must be connected with a ring, if CS-style interface, remove the ring;
3. Infrared night vision is poor, aperture, and daytime images are normal:
1. Check the infrared light is not enough brightness;
2. Check if the distance between the lens cover and the lens is too large. Infrared lamp and lens match (for details, see the reference table)
4. Check whether the infrared light starts;
5. Check whether the CCD board or lens senses infrared;
6. Check whether there are any reflectors in the surrounding environment or whether the space used is very small;
7. Check the machine's effective infrared distance and the actual use of the distance is four. Sometimes there is no image:
1. Is the supply voltage supply stable?
2. Is the video cable loose?
3. The video is in good contact with the interior;
4. Whether the power cord is broken, bad contact A few black bars or bars appear on the screen:
This situation is generally caused by the output voltage of the camera power supply is too large or the machine supply voltage is too low;
6. The image appears distorted or geometrically distorted:
1. Check if the used optical lens is abnormal;
2. The monitor's output impedance switch is set at 75 Euro.
3. Check whether the video connection cable impedance used is 75 ohms;
Seven. Infrared camera works fine during the day and no image at night:
Is the power of the power can not meet the requirements, because the infrared one machine working in the daytime with the ordinary camera, but at night when the infrared light is working, the working current suddenly increased;
Eight. The integrated camera does not automatically focus:
1. Check whether the focus state of the integrated camera is in keying priority or auto focus state;
2. The ambient light is too bright and the camera brightness value is too high. The camera cannot find the focus point.
9. The image appears black and white without color:
1. The video line is too long and the video signal is attenuated too much.
2. The monitor is turned to black and white;
3. The crystal oscillation frequency of the CCD trigger is out of range;
4. The color value of the CCD trigger software is so small that its color can hardly be displayed.
ten. The integrated camera suddenly restarts after the zoom or the image is not drawn after a period of time:
Because the integrated camera has relatively high power requirements, the operating current will suddenly increase due to the need to drive the motor during zooming. This will cause the supply of insufficient decoders (boards) to cause the camera to suddenly lose power;
eleven. Like a white mist:
1. Check if there is water mist inside the machine;
2. Check whether the lens cover is tightly clinging to the glass;
3. Check if the camera has a lens holder;
4. Check whether there is water mist in the CCD of the trigger.
5. Check if the machine's electronic shutter is open (turn it off if it is turned on);
6. Check whether the infrared light board and the lens are parallel (that is, there is a certain angle between the infrared light and the lens);
7. Check that the lens is taller than the lens holder, just as high (usually the lens holder is 3-4 mm higher than the lens);
With the development of information and network technology and the need of administrative management methods, the application of surveillance cameras has involved all areas of the people's working life. After years of development, the surveillance camera industry has already bid farewell to the stage of rapid development, into the transition period and the key into long. Under the impetus of technological advancement, video surveillance systems are gradually being developed in the direction of networked intelligence. A new generation of surveillance systems with intelligent analysis capabilities will greatly expand the application areas of video surveillance, and future surveillance cameras will be better than ordinary video surveillance systems. With more powerful video processing capabilities and intelligence factors.