.
MIL- I -21400 (Aer)
3.2.11
Inn- Input power connections shall be in accordance
with MS 25245.
Overload Protection- Overload protection for the equipment shall be pro-
3.2.12
vided in the equipment, All parts and circuits of the. equipment which. are likely to carry an over-
-
load due to anY failures or poor adjustments Shall have suitable protection devices or shall be .
Proportioned to withstand such overload without permanent damage to the equipment. The use of .
fuses and other protective devices shall be held to a minimum.
3.2.12.'1 Undervoltage Protection - The equipment shall not be damaged by voltages
below the minimum specified herein and shall automatically resume normal operation when the
voltage returns within limits.
Standby Provisions - The equipment shall provide for a standby position
3.2. 13
wherein rated voltage shall be applied to all tube filaments. Except for the associated filament
circuits, voltages shall not be applied to other parts of the equipment. .
Nomenclature and Nameplates - Nomenclature assignment. and nameplate
3.2.14
approval for equipment identification shall be in accordance with the requirements of Specification
MIL-N-18307.
.
3.2.15
Interchangeability y - The interchangeability requirements between like
assemblies, subassemblies and replaceable parts as specified in Specification MIL-E-5400 shall
be extended to require interchangeability of units of this equipment with the latest model of any
previously produced equipment. Such interchangeability shall be measured against a model,
manufacturing drawings, or other technical information as provided by the Bureau of Aeronautics
for the purpose. In the event that requirements of Specification MIL-E-5400 conflict with the
requirements for interchangeability y, the interchangeability y requirements shall govern.
3.2.16
Maintenance Provisions and Field Testing - Provisions for maintenance shall
be as specified in Specification MIL-E-MOO. Specific test points and test facilities shall be pro-
vided to the greatest extent practicable for ease of field testing and maintenance.
Radio Interference Control - The generation of radio interference by the
3.2.17
equipment and the vulnerability of the equipment to radio interference shall be controlled within
the limits of Specification MIL-I-6181. .
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3.3
. Performance
3.3.1
Warm-Up Time - The warm-up time for the equipment shall not exceed one
minute under standard and extreme service conditions.
Power Consumption - The total power consumption of the equipment shall
3.3.2
not exceed 60 watts continuous and 510 watts during pulsing at 28-volts DC.
Accuracy - Under conditions of thermal equilibrium at an ambient room
3.3.3
o
temperature of 30°C + 10 C the accuracy for one pulse shall not be less than one part in 10,000,
plus 1 millisecond possible variation from the mean spacing, for any one pulse.
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-3.4 . . etail Requirements ... .
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Intervalometer, Ordnance Release TD=239/A- The intervalometer shall be
3.4.1
and 58A163J3 and in addition shall meet the
in accordance with Drawings 58A163D1, 58A163D1, 58A163D2,
following requirements.
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