MIL-R-83407 Relays, Reed Mercury Wetted General Specification ForThis specification establishes the general requirements for mercury wetted reed relays that perform the switching functions associated with ground control support equipment. These relays are not be used in shipboard or airborne applications.

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MIL-R-83407C

3.7 Insulation resistance. When relays are tested as specified in 4.5.4, the insulation resistance shall be as specified (see 3.1).

3.8 DC coil resistance. When relays are tested as specified in 4.5.5, the dc coil resistance shall be as specified

(see 3.1).

3.9 Pickup and dropout voltage. When relays are tested as specified in 4.5.6, the pickup and dropout voltage shall be as specified (see 3.1).

3.10 Coil power dissipation (when specified) (see 3.1). When relays are tested as specified in 4.5.7, the power dissipated shall be as specified (see 3.1).

3.11 Contact resistance. When relays are tested as specified in 4.5.8, the contact resistance of any pair of mated contacts shall not exceed the specified value (see 3.1).

3.12 Operate and release time. When relays are tested as specified in 4.5.9, the operate and release time shall be as specified (see 3.1).

3.13 Coil inductance (when specified) (see 3.1). When relays are tested as specified in 4.5.10, the coil inductance shall be as specified (see 3.1).

3.14 Contact noise (when specified) (see 3.1). Relays shall be tested as specified in 4.5.11. The peak to peak ratings for the bandwidth (dc to 10 kilohertz (kHz)) shall be 400 microvolts ( V) at closure, 200 V at 1.5 milliseconds (ms), 125 V at 2 ms, 60 V at 2.5 ms, 35 V at 3 ms, 15 V at 4 ms, and 10 V at 5 ms.

3.15 Thermal EMF (when specified) (see 3.1). When relays are tested as specified in 4.5.12, the thermal EMF

shall be as specified (see 3.1).

3.16 Capacitance (when specified) (see 3.1). When relays are tested as specified in 4.5.13, the capacitance shall be as specified (see 3.1).

3.17 Thermal shock (high and low temperature operation). When relays are tested as specified in 4.5.14, they shall meet the following requirements at each temperature extreme.

Insulation resistance - - - - - - - - - - - - - - As specified in 3.7. At high temperature, insulation resistance between coil and enclosure shall be 500 megohms (m ) minimum.

Pickup and dropout voltage - - - - - - - - - As specified in 3.9. Operate and release time - - - - - - - - - - As specified in 3.12.

Visual examination - - - - - - - - - - - - - - - No cracking, peeling, or flaking of the finish is allowed. Following this test, dielectric withstanding voltage shall be as specified in 3.6.

3.18 Shock (specified pulse) (nonoperating). When relays are tested as specified in 4.5.15, there shall be no evidence of mechanical or electrical damage. Following this test, the dielectric withstanding voltage, contact resistance, and pickup and dropout voltages shall be as specified in 3.6, 3.11, and 3.9, respectively.

3.19 Vibration (nonoperating). When relays are tested as specified in 4.5.16, there shall be no evidence of breaking, cracking, chipping, or flaking of the finish or loosening of the terminals. Following this test, the dielectric withstanding voltage, contact resistance, and the pickup and dropout voltage shall be as specified in 3.6, 3.11, and

3.9, respectively.