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3.11.1.1 No-fire. The ignition element shall not fire when an electric current of 1.0 +0.10, !0.00
ampere (A) is applied in accordance with 4.7.8.1.
3.11.1.2 All-fire. The ignition element shall fire within 0.025 second when an electric current of 4.0
+0.10, !0.00 A is applied in accordance with 4.7.8.2.
3.11.2 Ballistic requirements. Ignition elements from each production lot, selected in accordance with
4.7.9, shall meet the requirements listed below when subjected to the tests prescribed in 4.7.9.
3.11.2.1 Chamber pressure. The upper (U) and lower (L) limits of maximum chamber pressure, in
pounds per square inch (psi), shall be 1800 psi and 1200 psi, respectively.
3.11.2.2 Response time. The time from application of firing current to start of pressure rise shall not
exceed 0.025 second. The time from start of pressure rise to maximum pressure shall not exceed 0.015
second.
3.11.2.3 Misfire. There shall be no misfires. (See 4.7.9.2.3.)
3.12 Workmanship. Ignition elements shall be constructed and finished in a manner to assure
compliance with all requirements of this specification. Particular attention should be directed to
dimensions, finishes and coatings.
4. VERIFICATION
4.1 Classification of inspections.
a. First article inspection (see 4.3.2).
b. Conformance inspection (see 4.6).
4.2 Sampling. Unless otherwise specified, and when applicable, the, sampling plans and procedures
used in the determination of the acceptability of products submitted by a supplier shall be in accordance
with the provisions of ANSI/ASQC Z1.4 or Z1.9, whichever applies.
4.3 Lots.
4.3.1 Inspection lots. Inspection lot definition, formation, and size shall be in accordance with
ANSI/ASQC Z1.4 or Z1.9, whichever applies.
4.3.2 First article. When specified by the procuring activity and before entering into quantity
production, an acceptable first article sample of 137 ignition elements shall be prepared. Of these
ignition elements, 127 shall be expended in the tests listed below and ten shall be retained for
investigative purposes. A first article sample acceptable for environmental and functional testing shall
be defined as a sample which has met the requirements of 3.4 through 3.10.4 of this specification.
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