为什么金属探测器需要及时校准、必要时应进行升级？
Why do metal detectors need to be calibrated in time and should be upgraded if necessary?
一台2010年的LOMA IQ3设备，应客户的要求我们对其做了升级和调整，并且我们也记录了升级前后的鲜明对比：
A 2010 LOMA IQ3 Metal Detector was upgraded and adjusted at the customer's request, and we also recorded a sharp contrast before and after the upgrade:
关于为什么需要调整与校准的一个更完整的说明文档请看这里：DSN802-00002金属探测器定期调整的必要性与原因！
For a description of why adjustments and calibrations are needed, please see one of the documents here: DSN802-00002 The Necessity and Causes of Regular Adjustment of the Metal Detector( only Chinese )!