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How to properly buy a genuine explosion-proof walkie-talkie
First of all, we need to determine which dangerous gases exist in our work environment, that is, the source of the danger, and how high the danger level index is. Then according to the explosion-proof level of the explosion-proof walkie-talkie and the introduction of the dangerous instruction manual to determine which explosion-proof walkie-talkie needs to be purchased.
Explosion-proof walkie-talkies are not literally walkies that can resist explosions, but walkie-talkies suitable for use in hazardous environments with explosive gases.
So which explosion-proof grades does the explosion-proof walkie-talkie belong to?
The level of explosion-proof walkie-talkies is divided into level, segment and group.
Grades are generally identified by Roman numerals. Grade I represents a mixture of volatile gases such as gasoline (and other petroleum products) and air; grade II represents a mixture of dust and air; grade III represents a mixture of suspended particles in air. Levels one to three represent different degrees of explosion, which decrease in order.
The segment is divided into 1 and 2 segments. Segment 1 refers to the place where explosive gas environment exists during normal operation, and segment 2 refers to the place where explosive gas will exist during abnormal operation or equipment failure.
The components are 7 groups A to G, group A is acetylene gas, group B is hydrogen, group C is ethylene, ether, etc., in group D are propane, acetone, ammonia, benzene, butan, gasoline, cyclopropane, Natural gas and the like are all exhaust gases from petroleum distillation. E-G represents dust. Group E is mostly metal dust, group F is carbon dust, and group G is grain dust. The degree of explosion protection is also declining.
In order to prevent the mix of genuine and fake explosion-proof walkie-talkies on the market, Motorola Systems is difficult to identify. So Motorola Systems introduced anti-counterfeit labels to identify the authenticity of explosion-proof walkie-talkies.
The explosion-proof certification mark (FM) is affixed to the bottom of the explosion-proof walkie-talkie, indicating that the explosion-proof walkie-talkie has passed explosion-proof certification. The explosion-proof mark will be marked next to the hazardous environment level that the radio can use, the battery number of the explosion-proof radio that must be used with it, the user manual number, and the applicable temperature code. As long as it is used strictly in accordance with the specified scope, safety can be ensured. The explosion-proof mark must be affixed after the product has been inspected before it is shipped from the Motorola manufacturing plant. It is absolutely prohibited to "upgrade" to an explosion-proof product and attach the explosion-proof mark at other locations.
After purchasing an explosion-proof walkie-talkie, be sure to check the use precautions and maintenance period of the explosion-proof walkie-talkie. At the same time, non-professional maintenance personnel should not modify or dismantle the walkie-talkie in order to avoid safety accidents.
According to the above purchase guide of explosion-proof walkie-talkies, you can rest assured to buy explosion-proof walkie-talkies.