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|  MTL-F-81959(AS)
NOTES
6.
6.1
Intended Use - AN/ASQ-81(V)-2 Magnetic Detecting Set
Maintenance.
Performance Characteristics - Nominal performance char-
6.2
acteristics shall be determined at input voltage of 27 + 0.5 VDC and 115
+ 1.0 VAC as applicable. (See 3,3.11). Limiting performance characteristics
shall be determined at the highest and lowest values of specified input
voltages. (See 4.3.2.1). These characteristics shall be used when testing
the equipment for compliance with the minimum acceptance standard of per-
formance.
Performance Objectives - Minimum size and weight.
6.3
simplicity of operation, ease of mai ntenance and an improvement in the per-
formance and reliability of the specific functions beyond the requirements
of the specification are objectives which shall be considered in the
production of this equipment. Where it appears a substantial reduction in
size, weight or improvement in simplicity of design, performance, ease of
maintenance or reliability will result from the use of materials, parts and
processes other than those specified in MIL-T-21200, it is desired that their
use be investiagated. When investigation shows advantages can be realized,
a request for approval shall be submitted to the procuring activity for
consideration. Each request shall be accompanied by complete supporting
information.
AS a general rule, nonrepairable subassemblies should be
6.4
encapsulated or hermetically-sealed. The number of connections interanl to
the subassembly should be held to a minimum. Detail parts tolerances and
ratings should be so selected that the life of the subassembly is greater than
that of a simalar repairable one. With few exceptions (such as high voltage
power supplies), the non-repairable subassembly should evidence a mean-time-
to-failure greater than 5000 hours, and for many applications this figure must
be nearer 50,000 hours.
Precedence of Documents - When the requirements of the
6.5
contract. this speificatlon or applicable subsidiary specifications are in
conflict, the following precedence shall apply:
(i) Contract - The contract shall have precedence over
any specifications.
(2) This Specification - This specification shall have
precedence over all applicable subsidiary specifications. Any deviation
from this specification, or from supsidiary specifications where applicable,
shall be specifically approved in writing by the procuring activity.
(3) Referenced Specifications - Any referenced specifications
shall have precedence over all applicable subsidiary specifications referenced
therein. All referenced specifications shall apply to the extent specified.
11
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