Mil-STD-331 F1: Environmental and Performance Tests for Fuze and Fuze Components - Electrostatic Discharge (ESD)
MIL-STD-331 personnel borne ESD testing requires two discharge networks, R/C capabilities 500pF/500Ohm and 500pF/5kOhm, along with a 30kV ESD generator. Accessories are also available to isolate the discharge tip from the main unit of the ESD generator (isolatiing the Fuze from the user), shielded environments are also available.
Scope of MIL-STD-331
This standard describes tests used by the Department of Defense (DoD) to determine the safety, reliability and performance characteristics of weapon system fuzes and fuze components at any stage in their life cycle.
History
MIL-STD-331A - Released October 15, 1976
MIL-STD-331B - Released December 1, 1989
MIL-STD-331C - Released January 5, 2005 (no significant changes to ESD)
ESD Generators for MIL-STD-331
Teseq NSG 438 ESD Simulator Gun |
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Features:
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Haefely ONYX 30 kV ESD Gun |
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Features:
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Test Parameters for MIL-STD-331
Testing to be performed in positive and negative polarities
| Source of Threat |
Voltage Across Capacitance |
Capacitance | Resistance | Discharge Induction |
| Personnel | 20kV ±5% | 500 pF ±5% | 5000 Ohms | <5 uH |
| Personnel | 20kV ±5% | 500 pF ±5% | 500 Ohms | <5 uH |
| Helicopter | 300kV ±5% | 1000 pF ±10% | 1 max* | <20 uH |
*Total distributed discharge circuit resistance measured with and accuracy