A charged device model (CDM) test is used to define the ESD a device can withstand when the device itself has an electrostatic charge and discharges due to metal contact. This discharge type is the most common type of ESD in electronic devices and causes most of the ESD damages in their manufacturing.
There are 2,000 pounds in one ton. Tons and pounds are both units of measurement that describe mass.
The short ton in the United States is often used to measure the weight of vehicles and is 2,000 pounds. A short ton is equal to 0.907 metric tons. A long ton, which is used in the United Kingdom and other countries, is 2,240 pounds. A long ton is equivalent to 1.016 metric tons. While two short tons equals 4,000 pounds, two long tons equal 4,480 pounds.