<function-states>
The <function-state> describes the effect upon a system during and after the exposure to an interference. Function states have initially been defined in order to evaluate electromagnetic compatibility and electrical immunity.
A function state is expressed by a capital letter (key) and a description of the state.
Figure 12: Functions State Description
Example for content:

Function states in compliance with standard DIN 40839 part 3
Function states
Description
A
Device works within the given tolerances
B
Device works, but not within the given tolerances, and returns after decay of the interference to function state A
C
Device does not work or works defectively, but returns after decay of the interference automatically to function state A
D
Device does not work or works defectively and stays after decay of the interference outside the given tolerances
E
Device does not accomplish one ore more functions during and after the exposure to the interference and has to be repaired or substituted after the exposure to the interference