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|  MIL-S-4040F
3.6.7 Altitude (when specified: see 3.1 and 4.7.14). Following this test; the insulation resistance, operating force
(torque), compensated actuating voltage, and deactuating voltage (or current) shall be as specified in 3.5.2, 3.5.1.1,
3.5.1.2, and 3.5.1.3, respectively.
3.6.8 High temperature (see 4.7.15). The solenoids shall meet the operating force (torque) requirements specified
in 3.5.1.1.
3.6.9 Low temperature (see 4.7.16). The solenoids shall meet the operating force (torque) requirements specified
in 3.5.1.1.
3.6.10 Salt spray (see 4.7.17). There shall be no evidence of corrosion, or peeling, chipping, or blistering of the
finish, nor exposure of the base metal when inspected by the unaided eye. Following this test, the insulation
resistance, operating force (torque), compensated actuating voltage, and deactuating voltage (or current) shall be as
specified in 3.5.2, 3.5.1.1, 3.5.1.2, and 3.5.1.3, respectively. For sealed or encapsulated solenoids, dielectric
withstanding voltage (at sea level) (see 3.5.3) shall be applicable.
3.6.11 Sand and dust (when specified, see 3.1 and 4.7.18). Following this test, the operating force (torque),
compensated actuating voltage, and deactuating voltage (or current) shall be a specified in 3.5.1.1, 3.5.1.2, and
3.5.1.3, respectively.
3.6.12 Explosion (when specified, see 3.1 and 4.7.19). Solenoids shall not ignite an ambient explosive
atmosphere.
3.7 Life (see 4.7.20). The solenoid shall remain mechanically and electrically operative. There shall be no
indication of mechanical resonance due to the frequency of the energizing voltage. Following this test, the coil
resistance shall be within 2 percent of the prelife value, and the insulation resistance and dielectric withstanding
voltage (at sea level), shall be as specified in 3.5.2 and 3.5.3, respectively.
3.7.1 Coil life (see 4.7.21). The coil current (see 4.7.2.5) and DC coil resistance (see 4.7.2.6) shall be within five
percent of the prelife value. Following the test, insulation resistance and dielectric withstanding voltage shall be as
specified in 3.5.2 and 3.5.3, respectively.
3.8 Marking. Unless otherwise specified (see 3.1), solenoids shall be permanently and legibly marked with either
the manufacturer's name, trademark, symbol, or CAGE code and the date code, as shown in the following example;
and, wherever space permits, the applicable PIN, the rated voltage (or current), and the operating frequency. Paper
levels shall not be used. Other markings which in any way interfere with, obscure, or confuse those specified herein,
are prohibited. Markings shall remain legible after all tests.
Example:
12345
-
Manufacturer's CAGE code
6824
-
Date code
3.8.1 Date code and manufacturer's source code. The date code and manufacturer's CAGE code shall be in
accordance with MIL-STD-1285.
3.9 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally
preferable materials should 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.
3.10 Workmanship. Solenoids shall be processed so that they are uniform in quality and shall be free from
cracked or deformed parts, sharp edges, burrs, or other defects which could affect their life, serviceability, or
appearance.
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as follows:
a.
Materials inspection (see 4.3).
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