The reasons and solutions of explosion proof cameras start fault

The explosion proof requirements in the petroleum, chemical, pharmaceutical, maritime, aerospace, metallurgy and scientific research and other fields have strict regulations. As an important equipment to obtain image data, explosion proof camera is the cross product of explosion proof industry and monitoring industry, can be used in the site with combustible, explosive gas dust, etc.. Understand the reasons for the equipment can not start normally and how to deal with, can effectively ensure the normal operation of the explosion proof cameras.

explosion proof camera failure itself

If the camera power is normal, the camera but no image, you can initially determine the explosion proof camera failure itself. Assuming that only one camera has this fault, then the problem may occur in the internal program of the surveillance camera dead.

Solution: power off and restart can be restored, the main reason may be caused by a bad reset circuit.

Explosion proof camera power supply is insufficient

The current explosion proof camera power supply quality is generally OK, but do not exclude the unstable or bad over time. Switching power supply itself is not enough power, resulting in switching power supply overheating, resulting in thermal protection, check the method is to the scene to touch the power supply whether the temperature, if it is cold and icy is generally the power supply dead.

Solution: Replace the power supply.

Video line and power line touch line

Generally speaking, the camera chip has a protection function, a short time touch line will not be fatal damage to the camera product, if it is 220V voltage is difficult to say. Line has a power supply: in the video transmission line if the lap with AC power, will lead to monitoring the camera head as well as the internal electrolytic capacitors of the distributor charging, which leads to blocking the video signal output. Test method: Use a multimeter to measure the video cable voltage.

Solution: find the power lap or add anti-interference device, anti-interference device has a full isolation function inside, is to prevent similar phenomena, and the highest can have 220V on the video circuit while the device still works normally, and will not be transmitted to the explosion proof surveillance cameras or the main control room.

Line reversal in engineering construction

Sometimes we will reverse the positive and negative lines of the explosion proof cameras, generally transferred over to OK. Too fine resulting in a large voltage drop, the analog camera manufacturer's camera can not start.

Solution: formal construction, analog camera manufacturers prompted by a multimeter to measure the camera input voltage current.

Other considerations

Explosion proof cameras in the installation and use, the same care should be taken. Explosion proof camera inlet must be sealed with a rubber seal, it is strictly prohibited to arbitrarily change the structure of the explosion proof camera, parts and internal wiring of the equipment. Fastening bolts shall not be arbitrarily swapped or missing, its excess in and out of the line mouth of the elastic gasket and metal gasket must remain factory sealed state, and should be tightened compression nuts to make the inlet sealed. Wiring is best to take the dark line, there is no way to take the bright line, then we must ensure that the physical protection of the line part well.

For explosion proof infrared cameras, installation should pay attention to avoid strong impact, daily operation and maintenance inspection, should try to avoid opening the explosion proof camera enclosure, must be opened when the power should be cut off first. Explosion proof infrared camera is relying on the CCD supporting infrared lamp emitting infrared light reflected on the object to the CCD camera lens imaging. Therefore, the installation of explosion proof infrared cameras should be avoided when the site has all black objects, open spaces, water and other objects that absorb infrared light, if infrared light is absorbed or weakened, will make the effective irradiation effect of infrared light is greatly reduced, thus affecting the effect of explosion proof infrared camera monitoring screen.

In short, explosion proof camera installation and construction wiring to be extra careful, encounter problems, using the troubleshooting method to find the cause of the failure and solve. Generally speaking, the brand manufacturers of explosion proof monitoring equipment factory has been well debugged, the probability of problems is relatively small. But some new customers doing projects in the case of not very understanding, such as the first installation, will be prone to problems, so the main problem is experience, do more, you know roughly how to troubleshoot these problems.

Another thing to note is that in chemical plants, some environments have explosive gases and dust, if the repair directly, it is easy to accident; the correct approach is to power off, remove the explosion proof camera, brought to a safe environment for testing and repair.