FED-STD-791D
g. Cover opening - to a height of 35.6 cm (14 in) at the front.
h. Open the cabinet twice each day, except Saturday and Sunday, once for 15 min
and again for 5 min. (A period of approximately 5 h should elapse between
openings.)
i. Check the rate of air to the cabinet, air temperatures, pH, and water level and
regulate, if necessary, in the morning and afternoon of each day.
j. Check remaining standard conditions once each week.
4.3 Desiccator, containing an indicating desiccant.
4.4 Panel hook, stainless steel (for handling panels during processing).
4.5 Hooks, Monel or stainless steel (for supporting steel panels).
4.6 Sandblast cabinet (a suitable apparatus for sandblasting test panels).
4.7 Beakers, tall-form, 500 mL.
4.8 Controlled atmosphere (to provide a temperature of 25 3C [77
5F] and a maximum relative humidity of 50%).
4.9 Shaded fluorescent light. (A 15-watt balance illuminator type that
will permit the panel to be viewed from all angles at a distance of 7.6 cm [3
in]).
5. MATERIALS
5.1 CAUTION: SOME MATERIALS ARE TOXIC AND HAZARDOUS. The
chemical materials listed in this section must be handled carefully. Federal Test Method
10000, Material Handling Safety Precautions, is a reference which lists all toxic and
hazardous materials cited in FTMS 791. The synonyms, life hazard, flammability,
handling and storage precautions, emergency treatment and measures, and spill practices
of each chemical are explained.
5.2 Naphtha, aliphatic (TT-N-95) [1,4,0].
5.3 Methyl alcohol (O-M-232) [1,3,0].
5.4 Silica sand, white, dry, sharp. (The size shall be such that it meets the
following sieve requirements of ASTM E 11.)
a. 100% must pass through a No. 10 sieve.
b. Minimum of 90% must pass through a No. 20 sieve.
c. Maximum of 10% permitted to pass through a No. 50 sieve.
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