Explosion-proof camera security is of great importance. If it cannot be effectively monitored, industrial production will be very dangerous. Those who are engaged in security monitoring construction and installation will encounter the phenomenon that the explosion-proof surveillance camera does not display on the screen during use. When there is no image in the explosion-proof camera, don't worry first. First check if there is any problem with the line and wiring. If it is an explosion-proof infrared camera, you can see if the infrared lamp is still on. If it is an explosion-proof camera without infrared, you can use a multimeter. To see if there is electricity delivery, there may be a problem with the hard disk recorder in the storage section.
In the face of many problems, where do we start? Below we provide some common explosion-proof camera without cause analysis and solutions for your reference.
First, the explosion-proof camera itself fails
If the camera is powered on and the camera does not have an image, it can be initially determined that the explosion-proof camera itself is malfunctioning. Assuming that only this analog anti-explosion surveillance camera manufacturer's camera has this fault, the problem may appear in the analog camera manufacturer's surveillance camera's internal program crashes.
Solution: It can be restored after a power failure and restart. It is mainly caused by a bad reset circuit.
Second, the explosion-proof camera power supply is insufficient
At present, the power quality of explosion-proof cameras is generally OK, but it cannot be ruled out that the time is unstable or broken. The power of the switching power supply itself is not enough, resulting in overheating of the switching power supply, resulting in thermal protection. The inspection method is to touch the site to check whether the power supply has a temperature. If it is cold, the power supply is dead.
Solution: Replace the power supply.
Third, the video line and power line touch line
In general, the camera chip has a protection function, and the short-term collision will not cause fatal damage to the camera product. If 22V voltage is difficult to say. Lines have power: if they are connected to AC power on the video transmission line, the monitoring camera head and the electrolytic capacitor inside the distributor will be charged, which will result in blocking the video signal output. Test Method: Use a multimeter to measure video cable voltage.
Solution: Find the power connection place or add anti-jamming device, anti-jamming device has full isolation function, is to prevent similar phenomena, and can have 220 volts on the video circuit and the device can still work normally. It will not be transmitted to the explosion-proof surveillance camera or the main control room.
Fourth, the construction of the line reversed
Sometimes we will connect the positive and negative poles of the explosion-proof camera's line. Generally, it will be OK to change it. Too fine results in a large pressure drop, and cameras of analog camera manufacturers cannot start.
Solution: The formal construction, analog camera manufacturers suggest using a multimeter to measure the camera input voltage and current. In short, the installation and construction wiring of explosion-proof cameras must be handled with care, and problems should be encountered. In general, the explosion-proof monitoring equipment of brand manufacturers has already been debugged before leaving the factory, and the probability of problems is relatively small. However, some customers who do new projects do not understand it well. For example, if they are installed for the first time, they will be prone to problems. Therefore, they are mainly experienced and do more, and they generally know how to troubleshoot these problems.
Another thing to be reminded is that, in chemical plants, some environments have explosive gases and dust. Don’t do maintenance directly inside. This is very easy to accident. The correct method is to remove the explosion-proof camera after the power is turned off. Test and overhaul in a safe environment.
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