Views:2 Author:Site Editor Publish Time: 2020-12-15 Origin:Site
Usually the parameters of the equipment have been set before leaving the factory. However, due to different environmental factors at different installation sites, in order to obtain the best use, the walk through metal detector must be calibrated at the installation site. So the parameters may be different. The following is the relevant calibration procedure.
Select working frequency
Set the speed response
Select the test item
Set the detection sensitivity
Perform the test
Before starting the calibration, you must select the appropriate operating frequency to start the calibration according to the manual. Because only a low enough frequency can be selected to reduce background interference. At the same time, it should be noted that the inspectors themselves cannot carry items containing metal components. Including clothes and shoes, accessories, etc.
When there is a difference between the speeds of people passing the walk through metal detector, the response speed may affect the sensitivity. You should adjust the speed according to the speed you want to run. If running at high speed, the high speed setting should be set higher. If you want to detect objects at a slower speed, the speed setting should be lowered. Under normal use, there is usually no need to adjust these settings. It should be noted that it should not be set higher than the actual required speed parameter, otherwise the impact will be greater.
In order to test, you should select the hazardous and non-hazardous items that are most likely to be detected. You should choose 3-5 different items. Items should be made of different materials, and items should be made of different materials, including magnetic metals and non-magnetic metals. In particular, the sensitivity of small knives made of non-magnetic metals is usually higher than the required sensitivity of a pistol. And it is easier to produce false information.
The purpose of setting the detection sensitivity is to find the lowest sensitivity to reliably detect the test object in the current process.The sensitivity setting may also affect the immunity of the device.The adjustment of detection sensitivity is divided into two steps. Customize the overall sensitivity, which can be adjusted manually or automatically. To adjust part of the sensitivity, objects must be moved through walk through metal detector in different ways in different places.
After defining the appropriate minimum sensitivity, the test will pass at that sensitivity. Inspect all test items Select the most stringent test items you consider to pass the walk through metal detector from the same position and in the same direction. At the same time, use another test item to check through the detector from the same location and in the same direction. Finally, looking at the results, if these items cannot be detected, the sensitivity parameter needs to be increased.
Now we have a certain understanding of how to calibrate walk through metal detector. However, since the parameters of the metal detector may be different, it is still necessary to calibrate strictly according to the instructions to avoid accidents.