The Ideal Gas Laws training set belongs to the fundamentals of thermodynamics and is covered in every thermodynamics training course. This training set performs isothermal changes that also occur at constant volume. Tanks allow for observation of state changes. Air is used as the test gas. In the first tank positioned on the left, the airtight air volume is decreased or increased using a compressor. This results in an isothermal state change. The compressor can also function as a vacuum pump. If the changes occur slowly, the state change takes place at nearly constant temperature. In the second tank positioned on the right, the temperature of the test gas is increased with a controlled electric heater, and the resulting pressure increase is measured. The volume of the enclosed gas remains constant.