MIL-DTL-81219C
ambient (see 4.6.4). There shall be no warping, cracking or discoloration which would adversely
affect the performance of the indicator. The indicator shall maintain its specified accuracy
during and after the thermal shock.
3.3.4 Altitude. The indicator shall operate with barometric pressure ranging from 30
inches of mercury (sea level) to 0.82 inch of mercury (80,000 feet elevation) and with pressure
varying at a maximum rate of 0.5 inch of mercury per second (see 4.6.6).
3.3.5 Salt atmosphere. The indicator shall meet the operational check requirements of
3.4.8 after being subjected to the tests specified in 4.6.7. There shall be no signs of corrosion of
the metal parts after the test.
3.3.6 Vibration. The indicator shall show no evidence of breakage, separation of
electrolyte, permanent deformation or loosening of parts and shall be operative during and after
subjection to the vibration test specified in 4.6.8. Application of the vibration shall be in each of
the three principal planes.
3.3.7 Shock. The indicator shall show no evidence of breakage, separation of
electrolyte, permanent deformation or loosening of parts and shall be operative during and after
subjection to the vibration test specified in 4.6.9.
3.3.8 Operational check. Each indicator shall meet the requirements specified in the
applicable MS sheet (see 4.6.2).
3.3.9 Hermetic seal. The indicator shall show no evidence of leakage when tested as
specified in 4.6.5.
3.3.10 Power consumption. Power consumption at rated voltage shall be in accordance
with the applicable MS sheet (see 4.6.11).
3.3.11 Life accuracy. Unless otherwise specified in the applicable MS sheet, accuracy
shall be within five percent (5%) of actual elapsed time when tested in accordance with 4.6.10.
3.4 Workmanship. The indicator, including all parts and accessories, shall be so
constructed and finished that it shall be free from all defects which would affect proper
functioning in service. Particular attention shall be given to freedom from blemishes, defects,
burrs and sharp edges, accuracy of dimensions, radii of fillets and marking of parts and
assemblies (see 4.6.1).
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