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 (also known as net ton) equals to 2000 pounds and used in north america (united states and canada), the long ton (also known as weight or gross ton) is used in the imperial system (UK and some of the other english speaking countries) and defined as 2240 pounds or 1016 kilograms.