MIL-DTL-19803G
temperature, the converter shall be tested as specified in 4.6.16. The converter shall meet the
requirements specified in 3.5.15.
4.6.16.3 Delivery rate (high temperature). The converter assembly shall be conditioned at a
temperature of 260 + 2 °F (126.7 + 1.1 °C) for 3 hours. After conditioning and while still at this
temperature, the converter shall be tested as specified in 4.5.16. The converter shall meet the
requirements specified in 3.5.15.
4.6.17 Reliability. The converter shall be subjected to the delivery rate testing at room
temperature (see 4.6.16.1). A failure shall be identified as any malfunction which causes the
converter to deliver an insufficient flow of oxygen or to maintain an improper operating pressure.
No parts shall be replaced as preventive maintenance during reliability testing. The converter
shall be checked at least once every 24 hours during reliability testing to determine if a failure
has occurred. Acceptance shall be based on the accept-reject criteria of Test Plan II of
MIL-HDBK-781. Recording, data handling and reporting procedures shall be in accordance
with MIL-HDBK-781. The converter shall meet the requirements specified in 3.5.16.
4.6.18 Maintainability. Maintainability tests shall be performed to show compliance with
3.5.17. All corrective maintenance tasks for expected failure modes shall be conducted by
simulating failures. Each maintenance task shall be performed at least three times to determine
average values. Only field level maintenance tasks shall be considered. The demonstration shall
include the procedure to troubleshoot, fault isolation, removal (based only on the installation
provisions of the item), fault correction, adjustment and realignment, final test, and replacement,
but shall exclude supply and administrative time. Upon completion, the converter shall be
operated to demonstrate normal functioning and will deliver oxygen on demand. The converter
shall meet the requirements specified in 3.5.17.
4.6.19 Gunfire test. The converter containing all plumbing and components shall be
mounted on a frame capable of withstanding the maximum force to which the converter will be
subjected by the gunfire test. The converter shall be filled to rate capacity with liquid oxygen
and the nominal operating pressure of the converter maintained. The converter shall be fired
upon from a distance of approximately 50 yards (45.7 m) by a 0.50 caliber armor piercing
incendiary bullet which has been tumbled. The bullet shall strike the converter in the liquid
phase. There shall be no evidence of shattering, and the converter assembly shall remain in one
piece except components in the direct line of fire. Shattering is the fragmentation of basic
materials. Separation of small components from the converter when they are located in the
immediate vicinity of the impact area is satisfactory. The converter shall meet the requirements
specified in 3.5.18.
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