corrected to standard conditions.
2.4.4.2
Refrigerant Leak Test
Each cell to be delivered to the Purchaser shall have been tested by the
manufacturer prior to packaging. During the test, the downstream
concentration of the refrigerant gas shall not exceed 0.0005 times the
upstream concentration. Cells that do not meet this requirement shall be
rejected. The cell shall be installed in the test tunnel in its service
orientation and the airflow to [236 L/s +/- 12 L/s 500 SCFM +/- 25 SCFM] [
472 L/s +/- 24 L/s 1,000 SCFM +/- 50 SCFM]. The cell shall be challenged
with a refrigerant vapor (R-134a or equivalent) at a concentration
equivalent to at least 20,000 times the minimum sensitivity of the monitor
used to measure filter leakage. The challenge-gas injection port shall be
located in such a manner to ensure uniform mixing of the tracer gas. The
downstream test port shall be located to ensure a representative sample.
Qualification data to verify test port selection shall be on file for
inspection upon request. The leak tracer chemical (refrigerant) shall be
injected continuously into the filter influent over an interval sufficient
to ensure the effluent monitor is capable of accurately measuring the
required leakage level.
2.4.4.3
Dimethylmethylphosphonate (DMMP) Breakthrough Life Test
**************************************************************************
NOTE: For production lots consisting of a large
number of filters, less than 10% of the filters can
be tested to obtain a high level of confidence of
acceptable performance.
**************************************************************************
The adsorber cell being destructively tested for DMMP gas life value as
specified for a minimum of [50] [_____] minutes when subjected to the rated
air flow at 52 degrees C 125 degrees F, at less than 40 percent relative
humidity and having an inlet concentration indicated. Test cells which are
filled with an adsorbent meeting the specified requirements shall be
randomly selected by the Contracting Officer from the lot. The number of
cells required for DMMP testing, shall be 10 percent and rounded down for
the total number of adsorbers in the lot, but not less than one. Therefore
the required number of deliverables is equal to the number required for the
system plus the number of cells to undergo this destructive testing. Each
test cell shall be hard-mounted to a rough handling machine in its service
orientation and vibrated for 10 minutes at a frequency of 200 cycles per
minute at an amplitude of 19.1 mm +/- 0.32 mm 3/4 inch +/- 1/8 inch in
accordance with MIL-STD-282, Test Method 105.11. Immediately following the
rough handling, the cells shall be DMMP breakthrough life tested in
accordance at the same test facility the cells were rough handled in order
to minimize carbon redistribution. If at least one cell fails to meet the
criteria the lot shall be rejected. The filling procedure must be adjusted
and another lot submitted for DMMP breakthrough life test. Just prior to
running the DMMP test, airflow resistance data shall be measured and
recorded for the sample cell and the airflow resistance calculated at
standard conditions as indicated. Cell shall be installed in test tunnel
in its service orientation. Airflow shall be adjusted to [236 L/s 500 SCFM
+/- 5%] [472 L/s 1,000 SCFM +/- 5%]. The test shall be run to cell life.
The cell shall be tested for DMMP breakthrough life at the following test
parameters:
a.
Challenge Concentration: 5,000 (400 mg/m3 1050 ppm +/- 80 ppm)
SECTION 15860A
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