First of all, the appearance should be exquisite, the surface can not be obviously scratched or rusted. The key of the magnetic lock is to look at his tensile strength. This requires professional equipment to be measured, so only after installation, the hand pulls suddenly Pulling and pulling can not be regarded as normal, but it should be noted that the installation of the electromagnetic lock body should be consistent, and the suction iron should not be installed too tightly, otherwise it will affect the tensile strength.
Secondly, the lock surface should have a metallic luster, and there should be no obvious scratches. The standby current is about 300 mA, and the operating current is lower than 900 mA. After a long time of power-on, the surface is slightly hot, but it is not hot. The force of the electric mortise lock should be sufficient. After the pressure is pressed, the lock can automatically bounce and be powerful. It is best to perform 4,000 continuity tests. If it is found that the lock is weak during the process, or if the bounce is not in place, or if it cannot be lifted, it is considered unqualified. Some engineering consultants ask: Is it a two-wire or multi-wire electric plug lock? This is the case. The multi-wire electric plug lock is controlled by a single-chip microcomputer. The operating current of the electric lock is controlled by the single-chip microcomputer, and the lock body will not It is too hot and has a delay control function and a magnetic door detection function. The delay control function can be used for the door with a bad spring. The magnetic door monitoring function can provide the controller with real-time monitoring of the door opening and closing state. Although these functions are not necessarily used, the quality and stability of the electric locks controlled by the single-chip microcomputer and the electric lock without the single-chip control are not at one level. Therefore, it is recommended that you do not have to save a little money. The two-wire electric plug lock has a very simple internal structure. It is only a mechanism that drives the electromagnetic coil. The operating current is large, and the heat is severe enough to damage the electric lock at a certain time. It is not recommended.