In the use of hall sensor for maintenance machinery, we will encounter holzer not working, from holzer's shape can not distinguish whether the holzer element is damaged, and how to detect whether the switch type of hall sensor is damaged. Taking Holzer YS282 as an example, the test method of switch type Holzer element is as follows:

First, find a resistance R of 1K Omega, which is connected to the figure 1 and 3 feet, and connect the positive pole of the DC power of the 12V to the foot of the switch type hall sensorYS282, and the anode is connected to the foot. The multimeter is placed in a DC 50V file, the red pen is connected to the foot, and the black pen is connected to the foot, and the pointer changes of the multimeter are observed. When the magnet N is very close to the test point of the hall sensor YS282, the pointer of the multimeter is deflected from the high level to the low level; when the N pole of the magnet is far away from the test point of the Holzer element YS282, the multimeter pointer is deflected from the low to the high level. If the magnet N is very close to or away from the Holzer element YS41F test point, the pointer of the multimeter does not deflect. It indicates that the Holzer element YS282 has been damaged and should be replaced in time. In addition, it is important to note that the Holzer device has a sensitive surface with a model mark and the corresponding pole of the permanent magnet, that is, the N type device is right to the N pole, and the S type device is on the S pole. Otherwise, the sensitivity of the device will be greatly reduced, or even it will not work.

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