Answers to questions about anti-static table mats
There are many problems in the purchase and use of anti-static table mats. Now Chuangxuanbao summarizes a few points for your reference:
First of all, the first one is that the anti-static table mat must be grounded. The grounding of the anti-static table mat is very important. It must be connected firmly. Everyone should pay attention to:
The first question is that when the anti-static table mat is grounded, it must be connected to the anti-static ground wire. Some companies do not have real anti-static grounding for cost considerations. They use the equipment grounding wire or even connect it to the water pipe. Or it is connected to a ground wire of a three-phase circuit. We recommend that you connect it to a dedicated anti-static ground wire. The real anti-static ground wire, why do you say that? Because as the name implies, different grounding Wires have different functions, so if you are considering anti-static, it is best to connect the anti-static ground wire, because the equipment ground wire, lightning protection ground wire, and lighting ground wire have their own balance points. , Then this balance point is different from our actual situation, it will form voltage drift, or zero point drift, in fact, there is no real grounding. Therefore, we suggest that our grounding wire antistatic pad must be connected to the antistatic pad. Go to the static grounding wire, so as to ensure that the quality of anti-static products will not cause problems and discharge static electricity well.
The second question is, some of our manufacturers, for the convenience of work, make a jack on the grounding wire on the anti-static table mat, which can be inserted into the wrist strap. What is the concept? The table mat is laid on the production line or works Anti-static table mats are laid on the stage. These are prepared for the operator. When the operator is working, he usually wears one on his hand except for wearing anti-static clothes, anti-static shoes, and anti-static table mats. Wrist strap, because the wrist strap is a common and very effective grounding static discharge system, then, when the wrist strap is grounded? The standard is that the wrist strap should be connected to the ground wire, but some people use the wrist to save trouble. The strap is connected to the table mat. Because it is grounded anyway, the wrist strap uses a jack to insert the wrist strap into the grounding wire like a stepping stone. Remember, how to connect this? If your grounding wire is There is no problem with the grounding termination of the pad. Many companies are on the upper end of the pad. What about its ground terminal? There is a jack on it and then the ground wire. Everyone wants to pay more attention to it. This is a problem. The phenomenon is very common, but we have found that after a lot of quality problems, the inspection, including the certification, is a very important point. Why? You can see, our bench mats have electrical resistivity. As mentioned earlier, we need to measure the system resistance of the pad, and the wrist strap also has resistance. If the wrist strap is directly grounded so that it discharges static electricity well, then it must be grounded through the anti-static pad and it must go over the feet of the table. In operation, the instruments placed on the pad are not a balanced point with the ground, or they are not at the same voltage value. Therefore, when you are grounding, the wrist strap must not be on the grounding point of the grounding pad. Connect to the real ground wire.
The third question is that some of our companies, in order to make the grounding wire simple, especially the temporary production line, after laying the mat, connect a grounding wire to the top, for example, the five-star claws are all snapped, especially the bottom one. When connecting the terminal to the ground wire, it uses an alligator clip to save trouble. Therefore, we suggest that the following grounding must use a terminal, just like screwing on a screw buckle, so that it will not be disconnected. , If you use alligator clips, if anyone touches it, the wire will be disconnected, but often we don’t notice it. In this way, we actually put on a mat, thinking that the ground wire is connected, but in fact it is broken. Open, this is also a very important point. Strictly speaking, it is not allowed. If we do certification and test, it will definitely be difficult.
Next, I will ground the anti-static table mat. Some standard methods will be introduced to you. If you follow the standard strictly, there is no problem with the anti-static table mat grounding. specific method:
A. Lay the anti-static table mat on the workbench, install the anti-static grounding wire on the corner of the workbench,
B. Cut a small opening on the anti-static table mat and insert it with the star claw part of the ground wire. The star claws must be fastened to the anti-static table mat.
C, the other end of the anti-static grounding wire is an anti-static grounding bus with alligator clips,
D. Measure whether the anti-static grounding wire, anti-static table mat and the ground are connected, and the test is passed, that is, the anti-static grounding device is basically completed.
Matters needing attention when using anti-static table mat:
1. The surface of the product is strictly prohibited from contacting acid and alkaline solvents (such as benzene, alcohol, etc.). This may cause the surface of the product to discolor, fade and decline in resistance. If you need to clean clothes, you can use a dust-free cloth dipped in a neutral solution (such as water, etc.) to wipe.
2. The glue used should not only be compatible with the bottom of the stepping stone, but also be compatible with our materials. It is firmly bonded, and there will be no shrinkage after the product is stuck. It is recommended to test the sticking before mass production.
3. Product shrinkage: It is recommended to enlarge the product specifications when cutting, relax and store it for 24 hours at the same time, so that the product has a fatigue recovery process, and then arrange the glue bonding production.