In Part-1, we went over the importance of conducting environmental tests for electronic products. The reason that you can keep the same hairdryer for five years, the same TV for ten years, and the same car for fifteen years is due to product testing, most of which can be done in a Tenney Environmental Test Chamber. Here in Part-2 we will go over the different types of environmental testing: simulation vs. stimulation. Simulation tests the product in the environment in which it normally operates. In other words, simulation tests how well the electronics perform in normal temperature, humidity, and vibration