MIL-DTL-62545 Module, Standard Electronic ControlThis specification covers the Module, Standard Electronic Control \(MSEC\), a component of Halon 1301 fire extinguishing systems used in military vehicles. The MSEC continuously monitors the system condition. Upon receipt of a fire signal, it issues crew warning and extinguisher discharge commands.

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MIL-DTL-62545E

3.5.1 Temperature.

3.5.1.1 High temperature. The MSEC shall meet the requirements of 3.5 during extended exposure to a

temperature of 71�C (160�F) (see 4.6.8.1.1).

3.5.1.2 Low temperature. The MSEC shall meet the requirements of 3.5 during extended exposure to a

temperature of -51�C (-60�F) (see 4.6.8.1.2).

3.5.1.3 Temperature shock. The MSEC shall meet the requirements of 3.5 after rapid changes of temperature

between -51�C and 71�C (-61�F and 160�F) (see 4.6.8.1.3).

3.5.2 Vibration. The MSEC shall meet the requirements of 3.5 during vibration at the amplitudes and frequencies

shown on figure 5 in each of three mutually perpendicular axes (see 4.6.8.2).

3.5.3 Shock. The MSEC shall meet the requirements of 3.5 when subjected to sawtooth shock pulses of

100 � 10 g, with a duration of 11 � 1.1 ms. The pulses shall be applied in both directions of three mutually

perpendicular axes (see 4.6.8.3 and figure 6).

3.5.4 Leakage.

3.5.4.1 Water immersion. The MSEC shall meet the requirements of 3.5 and shall not leak when immersed in

water (see 4.6.8.4.1).

3.5.4.2 Diesel fuel immersion. The MSEC shall meet the requirements of 3.5 and shall not leak when immersed in

diesel fuel conforming to DF-2 of A-A-52557 (see 4.6.8.4.2).

3.5.4.3 Water jet. The MSEC shall meet the requirements of 3.5 and shall not leak when exposed to water jet

cleaning (see 4.6.8.4.3).

3.5.5 Salt fog. The MSEC shall meet the requirements of 3.5 and shall show no evidence of corrosion after

prolonged exposure to a salt laden atmosphere (see 4.6.8.5).

3.5.6 Fungus. The MSEC shall meet the requirements of 3.5 and shall show no evidence of microbiological

growth that could affect performance following prolonged exposure, in a non-operating mode, to an environment

favorable to fungus growth (see 4.6.8.6).

3.5.7 Sand and dust. The MSEC shall meet the requirements of 3.5 after exposure to air driven sand and dust

3.5.8 Humidity. The MSEC shall meet requirements of 3.5 during operation in a high humidity environment