MIL-S-4040 Solenoid, Electrical General Specification ForThis specification covers the general requirements for electrical solenoids used to actuate various devices through the conversion of electrical signals into mechanical motion. These solenoids are of the axial stroke type and the rotary stroke type.

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MIL-S-4040G

4.7.10 Vibration (see 3.6.3). The solenoids shall be tested in accordance with method 204 of MIL-STD-202 . The following details shall apply:

a. Mounting: Solenoids shall be rigidly mounted by a normal mounting means in a suitable test jig. The vibration shall be monitored on top of the test jig as near as practicable to the support points of the solenoids.

b. Electrical load conditions: The solenoids shall be energized with rated coil voltage (or current) for half the required test time and deenergized for half the required test time in each of the three mutually perpendicular directions.

c. Test condition letter: See 3.1.

d. Tests and measurements after vibration: After vibration, operating force (torque), compensated actuating voltage, and deactuating voltage (or current) shall be tested as specified in 4.7.2.1, 4.7.2.2, and 4.7.2.3, respectively. Solenoids shall be inspected externally for evidence of damage such as cracks or loosening of parts.

4.7.11 Shock (see 3.6.4). Solenoids shall be tested in accordance with 4.7.11.1, 4.7.11.2, or 4.7.11.3, as applicable (see 3.1).

4.7.11.1 Shock 1. Solenoids shall be tested in accordance with method 205 of MIL-STD-202 . The following details shall apply:

a. Test condition letter: C.

b. Electrical operating conditions: In each direction of shock, the coil shall be deenergized during two shocks and energized with rated voltage (or current) during one shock.

c. Measurements after shock: Following this test, the operating force (torque), compensated actuating voltage, and deactuating voltage (current) shall be tested as specified in 4.7.2.1, 4.7.2.2, and 4.7.2.3, respectively.

4.7.11.2 Shock 2. Solenoids shall be tested in accordance with method 213 of MIL-STD-202 . The following details shall apply:

a. Mounting method and accessories: Normal mounting means. b. Test condition letter: A.

c. Electrical operating conditions: As specified in 4.7.11.1b. d. Measurements after shock: As specified in 4.7.11.1c.

Following the shock test, there shall be no evidence of mechanical or electrical damage, nor shall the test impair the normal operation of the solenoid.

4.7.11.3 Shock 3. Solenoids shall be tested in accordance with method 207 of MIL-STD-202 . The following details shall apply:

a. Mounting fixtures: Normal.

b. Height of hammer drop: See 3.1.

c. Electrical operating conditions: As specified in 4.7.11.1b.