Explosion-proof camera display failure analysis and solutions
2024-4-11 View：
1. Failure of the explosion-proof camera itself:
If the camera is powered on normally but there is no image from the camera, it can be initially determined that the explosion-proof camera itself is faulty. Assuming that only this analog camera from an explosion-proof surveillance camera manufacturer has this fault, then the problem may occur in the internal program crash of the analog camera manufacturer's surveillance camera.
Solution: It can be restored after a power outage and restart. This is mainly caused by a bad reset circuit.
2. The power supply of the explosion-proof camera is insufficient:
At present, the power quality of explosion-proof cameras is generally good, but it cannot be ruled out that it may become unstable or broken over time. The switching power supply itself is not powerful enough, causing the switching power supply to overheat, resulting in thermal protection. The way to check is to go to the scene and touch the power supply to see if there is temperature. If it is cold, the power supply has crashed.
Solution: Replace the power supply.
3. Video cable and power cable collide:
Generally speaking, the camera chip has a protection function. A short-term line contact will not cause fatal damage to the camera product. It is difficult to say if the voltage is 220V. The line has a power supply: If the video transmission line is connected to AC power, it will cause the electrolytic capacitors inside the surveillance camera head and distributor to charge, thus blocking the video signal output. Test method: Use a multimeter to measure the video cable voltage.
Solution: Find the power connection place or add an anti-interference device. The anti-interference device has a full isolation function inside to prevent similar phenomena. Moreover, the maximum voltage on the video circuit can be 220V and the device can still work normally. It will be transmitted to the explosion-proof surveillance camera or the main control room.
4. The wiring is reversed during construction:
Sometimes we reverse the positive and negative poles of the lines of the explosion-proof camera, but usually it will be OK if they are reversed. Excessive fineness will cause a large pressure drop, and the analog camera manufacturer's camera will not be able to start.
Solution: For regular construction, the analog camera manufacturer prompts to use a multimeter to measure the camera input voltage and current.
5. Other matters needing attention:
When installing and using explosion-proof cameras, you must also be careful. The cable inlet of the explosion-proof camera must be sealed with a rubber sealing ring. It is strictly prohibited to modify the structure, parts and internal circuits of the explosion-proof camera. The fastening bolts must not be arbitrarily replaced or missing. The elastic sealing gasket and metal gasket of the excess inlet and outlet must remain sealed at the factory, and the compression nut should be tightened to seal the inlet. It is best to use hidden wires for wiring. If there is no way to use open wires, then you must ensure that the physical protection of the circuit part is as good as possible.
During installation, care should be taken to avoid strong impact on the explosion-proof infrared camera. During daily operation and maintenance inspections, try to avoid opening the explosion-proof camera casing. If it must be opened, the power supply should be cut off first. The explosion-proof infrared camera relies on the infrared lamp equipped with the CCD to emit infrared light and reflect it on the object to the CCD camera lens to form an image. Therefore, when installing an explosion-proof infrared camera, you should avoid completely black objects, open spaces, water and other objects that absorb infrared light at the scene. If the infrared ray is absorbed or weakened, the effective irradiation effect of the infrared light will be greatly reduced, thus Affects the monitoring picture effect of explosion-proof infrared cameras.
In short, you should be extremely careful when installing and constructing explosion-proof cameras. If you encounter problems, use troubleshooting methods to find the cause of the failure and solve it. Generally speaking, the explosion-proof monitoring equipment of brand manufacturers has been debugged before leaving the factory, so the probability of problems is relatively low. However, some customers who are new to projects are prone to problems when they do not understand it very well, such as when installing for the first time. Therefore, it is mainly a matter of experience. After doing it more, you will roughly know how to troubleshoot these faults.
Another reminder is that in chemical plants, some environments contain explosive gases and dust. Do not carry out repairs directly inside, as this can easily cause accidents. The correct approach is to take out the explosion-proof camera after the power is turned off and bring it to the Conduct testing and maintenance in a safe environment.
If the camera is powered on normally but there is no image from the camera, it can be initially determined that the explosion-proof camera itself is faulty. Assuming that only this analog camera from an explosion-proof surveillance camera manufacturer has this fault, then the problem may occur in the internal program crash of the analog camera manufacturer's surveillance camera.
Solution: It can be restored after a power outage and restart. This is mainly caused by a bad reset circuit.
2. The power supply of the explosion-proof camera is insufficient:
At present, the power quality of explosion-proof cameras is generally good, but it cannot be ruled out that it may become unstable or broken over time. The switching power supply itself is not powerful enough, causing the switching power supply to overheat, resulting in thermal protection. The way to check is to go to the scene and touch the power supply to see if there is temperature. If it is cold, the power supply has crashed.
Solution: Replace the power supply.
3. Video cable and power cable collide:
Generally speaking, the camera chip has a protection function. A short-term line contact will not cause fatal damage to the camera product. It is difficult to say if the voltage is 220V. The line has a power supply: If the video transmission line is connected to AC power, it will cause the electrolytic capacitors inside the surveillance camera head and distributor to charge, thus blocking the video signal output. Test method: Use a multimeter to measure the video cable voltage.
Solution: Find the power connection place or add an anti-interference device. The anti-interference device has a full isolation function inside to prevent similar phenomena. Moreover, the maximum voltage on the video circuit can be 220V and the device can still work normally. It will be transmitted to the explosion-proof surveillance camera or the main control room.
4. The wiring is reversed during construction:
Sometimes we reverse the positive and negative poles of the lines of the explosion-proof camera, but usually it will be OK if they are reversed. Excessive fineness will cause a large pressure drop, and the analog camera manufacturer's camera will not be able to start.
Solution: For regular construction, the analog camera manufacturer prompts to use a multimeter to measure the camera input voltage and current.
5. Other matters needing attention:
When installing and using explosion-proof cameras, you must also be careful. The cable inlet of the explosion-proof camera must be sealed with a rubber sealing ring. It is strictly prohibited to modify the structure, parts and internal circuits of the explosion-proof camera. The fastening bolts must not be arbitrarily replaced or missing. The elastic sealing gasket and metal gasket of the excess inlet and outlet must remain sealed at the factory, and the compression nut should be tightened to seal the inlet. It is best to use hidden wires for wiring. If there is no way to use open wires, then you must ensure that the physical protection of the circuit part is as good as possible.
During installation, care should be taken to avoid strong impact on the explosion-proof infrared camera. During daily operation and maintenance inspections, try to avoid opening the explosion-proof camera casing. If it must be opened, the power supply should be cut off first. The explosion-proof infrared camera relies on the infrared lamp equipped with the CCD to emit infrared light and reflect it on the object to the CCD camera lens to form an image. Therefore, when installing an explosion-proof infrared camera, you should avoid completely black objects, open spaces, water and other objects that absorb infrared light at the scene. If the infrared ray is absorbed or weakened, the effective irradiation effect of the infrared light will be greatly reduced, thus Affects the monitoring picture effect of explosion-proof infrared cameras.
In short, you should be extremely careful when installing and constructing explosion-proof cameras. If you encounter problems, use troubleshooting methods to find the cause of the failure and solve it. Generally speaking, the explosion-proof monitoring equipment of brand manufacturers has been debugged before leaving the factory, so the probability of problems is relatively low. However, some customers who are new to projects are prone to problems when they do not understand it very well, such as when installing for the first time. Therefore, it is mainly a matter of experience. After doing it more, you will roughly know how to troubleshoot these faults.
Another reminder is that in chemical plants, some environments contain explosive gases and dust. Do not carry out repairs directly inside, as this can easily cause accidents. The correct approach is to take out the explosion-proof camera after the power is turned off and bring it to the Conduct testing and maintenance in a safe environment.