UL62368是信息类产品申请UL认证的主要标准，产品范围非常广，我们今天介绍一下UL62368中一个常见的测试：电容放电测试

电容放电测试俗称：SAFEGUARDS AGAINST CAPACITOR DISCHARGE AFTER DISCONNECTION OF A CAPACITOR

测试设备：示波器，高压探棒，功率分析仪。

重点：UL62368电容放电测试针对高压探棒是有规格要求的，选择时候一定要注意，不然会引起测量数据不准确。

高压探棒要求如下：

For this test, measurement probes having an input impedance consisting of a resistance of 100 MΩ ± 5 MΩ in parallel with an input capacitance of 25 pF or less shall be used.

测试方法：（标准原文）

Before connecting the EUT a supply source as noted below, the single fault condition described below was applied.  If provided, a mains switch was moved to the off or on position, whichever produced the most unfavorable results.  The connector providing access to capacitor voltage was then disconnected.  Two seconds after disconnection of the connector, the available voltage was measured between any combination of contacts

简单来讲就是，产品在正常和单个零部件故障状态下都需要考虑，产品断电后2S记录示波器抓取参数，与标准要求进行对比。

为了保证产品在单个零部件故障状态的测试能够通过，我们通常要将产品设计成双路放电的结构。
 
下图是示波器抓取某家产品的放电，供大家参考：


下期咱们讲解电容放电的限值如何看。

德立弗是UL62368的目击实验室，可以方便地安排产品的目击测试，欢迎您的咨询。