MIL-DTL-52872D
3.3. Material. Material shall be as specified herein and on the
applicable drawings. Materials not specified shall be selected by the
contractor and shall be subject to all provisions of this specification.
3.3.1. Material deterioration prevention and control. The UMS shall be
fabricated from compatible materials, inherently corrosion resistant or
treated to provide protection against the various forms of corrosion and
deterioration that may be encountered in any of the applicable operating and
storage environments to which the UMS may be exposed.
3.3.2. Dissimilar metals. Dissimilar metals shall not be used in intimate
contact with each other unless protected against galvanic corrosion.
Dissimilar metals and methods of protection are defined and detailed in
MIL-STD-889.
3.3.3. Recycled, recovered, or environmentally preferable materials.
Recycled, recovered, or environmentally preferable materials shall be used to
the maximum extent possible provided that the material meets or exceeds the
operational and maintenance requirements and promotes economically
advantageous life cycle costs. Used, rebuilt, or remanufactured components,
pieces, and parts shall not be incorporated in the UMS.
3.4. Environmental conditions. The UMS and major components or transducer
kits when furnished separately shall withstand individual environmental
conditions specified herein, or combinations thereof, without damage (see
6.4.3), performance degradation, or malfunction when tested as specified in
4.4.2.5.
3.4.1.
Operational.
Temperature range of -20 to +150 °F.
a.
b.
Humidity up to 95 percent relative.
3.4.2.
Non-operational condition and storage.
Temperature range of -30 to +165 °F.
a.
b.
Humidity up to 95 percent relative.
c.
Shock: bench handling, equipment not operating.
3.5. Detailed technical requirements. The UMS and major components or
transducer kits when furnished separately shall perform as specified herein
under any of the operating test conditions specified herein.
3.5.1.
Terminal board connections.
3.5.1.1. Transceiver terminal board. The transceiver terminal board shall
be marked with identifying terminal numbers as follows:
Function
Terminal Board 1
(TB1)
1
Transmitter input signal
2
Transmitter input signal return
3
Receiver output signal
4
Receiver output signal return
5
Tamper signal
6
Tamper signal
7
Spare
8
Spare
9
Enclosure ground
10
Spare
4
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