6.6.3 Material and assembly qualification

a. Tests shall be performed for both normal voltage and inverted voltage situations.

b. It shall be agreed with the customer whether or not inverted voltage situation is simulated through potential biasing.

c. The assembly testing under the worst case environment at all temperatures to be used in the mission shall lead to an assessment of ESD risk as follows:

1. No ESD is observed and potential remains below 100 V in inverted gradient or 1000 V in direct gradient: No ESD risk.

2. No ESD is observed but potential between 100 V and 1000 V in inverted voltage gradient or potential above 1000 V in normal gradient mode under multi-energetic irradiation: moderate ESD risk.

3. ESD is observed: high ESD risk.

NOTE Definition of the worst-case environment is part of the customer specification and can refer to the ECSS-E-ST-10-04 “Space environment”.

d. In the cases 6.6.3c.2 and 6.6.3c.3, a determination of the possible effects of ESDs on electronic systems shall be performed by analysis and testing.