MIL-DTL-62547D
4.3.2.2 Test temperature stabilization. Tests shall be conducted after the test sample has
been allowed sufficient time for temperature stabilization. Test temperature stabilization is the
point at which the test sample has not varied in temperature more than 2 °C (3.6 °F) per hour.
4.3.2.3 Mounting of the extinguisher during testing. During testing, except where
otherwise specified herein, the extinguisher shall be mounted using metal straps, bolted clamps,
or brackets to withstand an impulse load of 4500 N (1000 lbf) at 21 °C (70 °F) during discharge.
No twisting, rotation or bending of the extinguisher or mounting hardware shall be allowed.
4.4 Methods of inspection.
4.4.1 Materials, design, and construction. Conformance to 3.2 through 3.3.2.3 shall be
determined by inspection of contractor records providing proof or certification that design,
construction, processing, and materials conform to requirements specified herein. Applicable
records shall include drawings, specifications, design data, receiving inspection records,
processing and quality control standards, vendor catalogs and certification, industry standards,
test reports, and rating data.
4.4.2 Operating requirements verification.
4.4.2.1 Discharge valve.
4.4.2.1.1 Manual discharge. To determine conformance to 3.4.1.1, using one or more of
the methods outlined in 4.3 or 4.3.1, verify that the manual discharge is properly installed and
present within the discharge valve. Visually inspect that the manual discharge provides
clearance within the valve envelope to allow both push and pull activation of the manual release
lever.
4.4.2.1.2 Electrical release. To determine conformance to 3.4.1.2, the extinguisher shall
be set up in accordance with figure 4 at room temperature, 25±8 °C (77±14 °F). Upon being
electrically actuated by a 28 Vdc step input, the valve shall begin to discharge the Halon 1301
within 10 ms after receiving the activation signal specified in 3.3.1.1.9.3 across the terminals of
the discharge valve. The valve shall complete the discharge of the liquid phase of Halon 1301
within the time limits specified in table II. Voltage and current draw shall be recorded. This test
shall be repeated with inputs of 30 and 16 Vdc. A check for residual Halon weight and pressure
shall then be made.
4.4.2.1.3 Fragmentation. To determine conformance to 3.4.1.3, the extinguisher shall be
electrically activated, as specified in 3.3.1.1.9.3, and all resulting fragments shall be collected.
The fragments shall be sized and counted using a procedure capable of measuring and counting
all fragments larger than 40 micrometers (0.0016 in.).
4.4.2.1.4 Pressure.
4.4.2.1.4.1 Pressure relief device. To determine conformance to 3.4.1.4.1, the modified
extinguisher of 4.4.2.2.4 shall be used. The pressure relief device shall be installed in the valve
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