There are two main factors to consider when purchasing a metal detector: 1. Is it to meet your own requirements? 2. Is the price of the product bought? Let's talk about these two issues.
First, is it to meet your own requirements?
1. Determine the machine and caliber of the transport method according to the nature and flow rate of the material. (eg conveyor belt, gravity drop, etc. The size of the caliber is determined by selecting the minimum channel size under the premise of ensuring maximum flow.)
2. Requirements for detection sensitivity. (This refers to the detection sensitivity that must be guaranteed in production.)
3. What machine is going to buy at a price?
4. Requirements for the shape of the machine.
Second, according to their own requirements to find the right machine. Usually a group of basically satisfactory machines can be found.
Third, consult the seller. Several questions that must be asked to the seller: 1. What is the diameter of the actual working channel of the machine? transfer speed? , to verify that it meets its maximum flow requirements. 2. The requirements of the machine for power supply and electromagnetic environment. First, make a measurement of your power supply, and ask the machine to meet the power status of the work site. The machine must be adapted to the electromagnetic environment of the buyer's job site. 3. It must be clearly stated that the machine can detect the metal ball of the size corresponding to the sensitivity of the buyer (test time is more than 1 hour, once every 2 or 3 minutes, all tests must be 100% valid and no error is allowed during the whole test) Call the police). 4. If you cannot make a clear written commitment to the above three items, you will not consider it. 5, the total price.
Fourth, combine other factors to choose the most suitable model.
Fifth, the acceptance of the machine. 1, shape, appearance, the actual working channel caliber. 2. Machine work sensitivity and stability (emphasis).
1. First of all, why sensitivity and stability are the main concerns of machine acceptance. The appearance of the machine can be seen, the user said which is good, that is good. The intrinsic quality of a machine is the true embodiment of the value of the machine. Therefore, by grasping the core indicators of testing the inherent quality of the machine, we can buy a value-for-money product. And this core indicator is sensitivity and stability. The high sensitivity and good stability of the machine indicate that the machine is more advanced in technology, the standard of production reference is higher, and the materials are more elaborate. As far as the materials are concerned, the electronic materials have different grades, and the price difference may be as many as several dozen times or even higher. This is not visible on the outside, but it can be clearly seen through a comparison of sensitivity and stability.
2. The sensitivity of the machine seller is the so-called empty machine sensitivity. The machine repeatedly tests this sensitivity and must be effectively detected (100%). No false alarm is allowed. The test time is more than 30 minutes. Not up to the following paragraph 4.
3. Under the normal conveying condition of the material, the sensitivity setting should be adjusted appropriately. Repeated detection according to the buyer's required sensitivity must be effectively detected (100%), false alarm is not allowed, and the test time is more than 60 minutes. Not up to the following paragraph 4.
4. For the machine that does not meet the requirements, please ask the seller not to make any explanation. The immediate trading relationship does not exist and the things are shipped away. (This is necessary to make a written statement before the sale and purchase relationship is determined)
6. For the buyer, if you buy a machine with poor performance, it means that the uncertainty of the test result is greatly increased (the test result is meaningless). 2. Material waste. 3. The machine failure rate is high. Such a machine can only be used as a display. Therefore, we must grasp the core of the problem in order to better protect our own interests. This is the eternal hard truth.