TM 104630-246-12&P
TM 09241 B-12&P
Section V. OPERATION UNDER UNUSUAL CONDITIONS
2-15. EXTREME COLD.
CAUTION
The following items contained in this kit must be removed and protected from temperatures below 32°F
(0°C):
Three bottles TDS/conductivity standard solution. Three bottles NTU primary standard. One bottle wide
range pH indicator solution. One bottle demineralizer resin. One pH electrode.
These chemicals can be rendered useless and equipment damaged if allowed to freeze.
All tests must be performed with equipment and samples above 32°F (0°C).
2-16. EXTREME HEAT.
All tests must be performed with equipment and samples below 125°F (51.70C).
2-17. DUSTY OR SANDY ENVIRONMENT.
a.
Keep equipment in closed case or covered until ready to use.
b.
Use cover (coat, blanket, etc.) if possible to protect test area.
c.
Keep test equipment, water samples, and solutions as clean as possible during and between tests. Keep lids
tightly closed and open only when needed. Cover beakers when in use.
2-18. SALT AIR OR SEA SPRAY.
a.
Salt presents a serious corrosion problem and all equipment coming in contact with salt water or salt fog
should be flushed or sponged with fresh clean water as soon as possible then dried thoroughly.
b.
During tests, be careful not to contaminate samples or solutions with any salt water or spray. Perform tests as
quickly as possible and clean equipment thoroughly between steps.
2-19. UNCONTROLLED FIELD CONDITIONS.
a.
When demineralized or distilled water is not available, use cleanest water available (drinking water, clear
stream, etc.) to fill the wash bottle containing demineralized resin.
b.
Use water from wash bottle whenever demineralized or distilled water is called for to clean equipment and
prepare test solutions.
c.
Test wash bottle water periodically to check effectiveness of demineralized resin. Test water using total
dissolved solids meter. A reading above 750 PPM (750 mg/l) indicates that the demineralized resin is no longer effective
and that the wash bottle must be replaced.
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