Camera malfunctions and solutions
Wen: Rui Dun International (Hong Kong) Co., Ltd. Dreamcatcher
1. Infrared hemisphere series machines have poor image illumination, white or bright white aperture at night
This phenomenon is caused by improper assembly of the machine. When the photosensitive device (photoresistor) is too far away from the hemisphere during assembly, the infrared light will not be fully started to cause the night illumination of the machine to be incomplete; the image will appear white or bright white. The phenomenon is mainly caused by the infrared light emitting tube. The infrared light is refracted by the dome cover to the lens. This phenomenon is to avoid the infrared light refracting to the lens surface. Usually the sponge ring is used to isolate the lens from the infrared light. The ball cover must be tightly attached to the sponge ring during assembly.
2, night vision infrared waterproof machine normal day image, night white
This phenomenon is generally due to the use of reflective materials in the machine environment or in a small space, due to reflection of infrared light, to solve this phenomenon should first determine whether the use of reflective materials, improve the use of the environment as much as possible, and then check the effective infrared machine Whether the distance is in accordance with the actual usage distance; if a long-distance infrared machine is used in a small space, the machine image will be white due to the strong infrared light.
3, no image
First, check whether the polarity of the external power supply is correct and whether the output voltage meets the requirements (power supply error: DC12V±10%, AC24V± 5%). Then, check whether the video connection is in good contact. If using a manual iris lens, check whether the aperture is open or not. The aperture lens needs to adjust the LEVEL potentiometer to make the aperture in place
4, color distortion, color cast
It may be that the white balance switch (AWB) is not set properly, or the ambient light conditions may change too much. At this time, check whether the switch setting is in the OFF position, and you should think of ways to improve the ambient light conditions.
5, the image appears distorted or geometric distortion
This phenomenon may be a problem with the camera's or monitor's geometry correction circuit or an optical lens, or it may be that the characteristic impedance of the video connection cable or device does not match the output impedance of the camera.
When the above phenomenon occurs, please check whether the used optical lens is abnormal and whether the monitor's input impedance switch is set to 75Ω, and then check whether the impedance of the video cable used is 75Ω.
6, the screen appears a few black vertical bars or bars mixed
This situation is generally the output voltage ripple of the machine power supply is too large, should strengthen the filter and the use of good performance DC power supply.
7, the use of automatic iris lens image is too dark
First check whether the EE/AI function switch is set at the AI ​​side, and secondly check if the LEVEL potentiometer adjustment is appropriate.
8. Bad image quality a. Check the lens for fingerprints or dirt.
b. Check if the aperture is adjusted.
c. Check for poor video cable contact.
d. Check for any problems with the electronic shutter or white balance settings.
e. Check if the transmission distance is too far.
f. Check if the voltage is normal.
g. Check for nearby sources of interference.
h. Check to ensure that the elevator is insulated from interference when installed in an elevator.
i. Check whether the CS interface is connected.
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