(AATCC 134) This procedure, called the "Step Method," has a person wearing neolite-soled shoes walking across the carpet sample. The person is connected to a voltmeter and the peak charge generated by the walking is measured. The test is conducted under standard temperature (70 degrees F) and relative humidity (20%) conditions. As a rule, the carpet should generate a static charge of less than 3.5 kilovolts (KV), which is the threshold of human sensitivity. In actual use conditions, the amount of static generated is dependent primarily upon the relative humidity. If the relative humidity can be kept at 40% or above, static generation is usually not a problem. Certain applications, such as computer rooms, require static generation of less than 1.0 KV, so environmental controls and specially grounded carpeting may be required.