求助：UL 8750中的LVLE 电路，如何测试？谢谢！
8.14.2 The input to the source under evaluation shall be connected as intended in the end product. Theoutput to the circuit under evaluation shall be connected to a variable resistance load. If the source under
evaluation has multiple outputs, all other outputs shall be open-circuited. The output voltage to the circuit
under evaluation shall first be measured under open circuit conditions. The variable resistance load on the
output under test shall then be adjusted from open circuit to short circuit until an available current of 8 A
can be obtained and sustained for one minute of operation. If 8 A cannot be sustained for one minute
under any condition of load, the test shall be discontinued。
a variable resistance load直流负载？还是可以用可变电阻器？
The variable resistance load on the output under test shall then be adjusted from open circuit to short circuit until an available current of 8 A can be obtained and sustained for one minute of operation这个开路和短路如何测试呢？得到并维持8A的电流一分钟？
英语不行。求解答。
用可变电阻器 负载端调节滑动变阻器，慢慢将电流增加到8A，维持1分钟 我做过几次LVLE的目击，我们采用的是直流电子负载，另外，提醒一下这个测试本身的可操作性不是很强，应该采用UL1310的“Output Current and Power Test”来测试，步骤我简单总结如下：
1）首先进行短路测试，找出短路测试中哪些元器件短路后产品不会shut down .
2)测量短路开路对应的最大电流（滑动电阻最大时对应的电流，滑动电阻为0时对应的电流）
3）短路步骤1）中元器件，记录输出电流。（滑动电阻从最大调节到0，观察这个过程中的最大电流电压）
:):):):)
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