MIL-DTL-62545E
6.4.3 Automatic back-up. This is the capability of the MSEC to activate an alternate extinguisher(s) when the
MSEC determines that flow did not occur from the originally selected extinguisher(s).
6.4.4 One/two shot system. Indicates the number of separate extinguishing actions (discharging or extinguishant)
of which a particular fire extinguishing system is capable. An extinguishing action consists of activating either one or
two extinguishers.
6.4.5 False alarm. A false alarm exists when any MSEC output signal is produced without proper input stimuli.
6.4.6 Pressure. Unless otherwise specified, all pressures specified in this document are gauge.
6.5 Nuclear survivability criteria. Vendors requesting the nuclear survivability criteria, which is classified
confidential, must possess the proper security clearance and a demonstrated need to know (see 2.2.2 and 3.4.8).
6.6 Inspection. The following information is presented as guidance for the contracting officer in specifying
sampling and acceptance procedures for conformance inspection and control testing in acquisition documents.
6.6.1 Conformance inspection.
6.6.1.1 Sampling.
6.6.1.1.1 Lot formation. A lot should consist of all the MSEC's of one type and Part or Identifying Number (PIN),
from an identifiable production period, from one manufacturer, submitted at one time for acceptance.
6.6.1.1.2 Sampling plan. Statistical sampling and inspection is performed on an inspection lot basis with a random
sample of MSEC's selected in accordance with table VII. Acceptance is based upon the zero defective sampling
plan. No failures are permitted.
TABLE VII. Conformance inspection sampling plan.
Lot size
Sample size
1 - 13
100 percent
14 - 150
13
151 - 280
20
281 - 500
29
501 - 1,200
34
1,201 - 3,200
42
3,201 - 10,000
50
10,001 - 35,000
60
35,001 - 150,000
74
150,001 - 500,000
90
500,001 and over
102
6.6.1.2 Acceptance. Samples selected in accordance with 6.6.1.1.2 should be examined for the defects listed in
table VI. Acceptance is based upon the zero defective sampling plan. No failures are permitted.
6.6.2 Control tests. For control test purposes, consideration should be given to randomly select one MSEC from
each lot of 250 units consecutively produced, except that not more than one MSEC should be tested in a 30-day
period, nor less than one MSEC tested in a 6 month period.
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