Method 213B is the Shock (Specified Pulse) test, conducted to determine the suitability of component parts and subassemblies of electrical and electronic components when subjected to shocks such as those expected from rough handling, transportation, and military operations.
This test differs from other shock tests in that the design of the shock machine is not specified, but the half-sine and sawtooth shock pulse waveforms are specified with tolerances. The frequency response of the measuring system is also specified with tolerances.
The test evaluates both structural integrity and functional performance of components after exposure to specified shock pulses, which is critical for equipment reliability in military service.