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MIL-DTL-28788 Switches, Air And Liquid Flow, Sensing, General Specification ForThis specification covers the general requirements for flow switches intended primarily for use in equipment to sense velocity and flow of air or liquid.

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MIL-DTL-28788C

TABLE II. Qualification inspection.

Requirement

Test method

Inspection

Paragraph

Group I (all sample units)

Visual and mechanical examination

3.29, and 3.30

Solderability (when specified)

3.7

4.7.3

Run-in (when specified)

Calibration

Transfer time

Coincidence of operating points (when specified)

3.10

4.7.6

Group II (4 sample units from group I)

High temperature

Low temperature

Terminal strength (when specified)

3.13

4.7.9

Connector torque (when specified)

Shock

Vibration

Thermal shock

Moisture resistance

Insulation resistance

3.19

4.7.15

Dielectric withstanding voltage

3.20

4.7.16

Seal (when specified)

3.21

4.7.17

Group III (sample units from group I) 1/

Contact resistance

3.22

4.7.18

Endurance (2 sample units per electrical load or 4 sample units minimum)

Contact resistance

Dielectric withstanding voltage

3.20

4.7.16

Seal (when specified)

3.21

4.7.17

Group IV (2 sample units from group II)

Sand and dust (when specified)

3.24

4.7.20

Explosion (when specified)

3.25

4.7.21

Flammability (when specified)

3.26

4.7.22

Group V (4 sample units from group III)

Salt spray (corrosion)

Burst pressure

Dielectric withstanding voltage

3.20

4.7.16

1/ Number of sample units shall depend on number of loads specified.