Section III.
OPERATION
Operation Below Freezing
Plastic Containers
Sample Water
Below -35°C (-30°F)
Operating Above 25°C (77°F) Temperature
WQAS
Incubator
Volatile Kit Inclusions
Shelf Life
2-29.
OPERATING BELOW FREEZING.
TM 5-6630-215-12
UNDER UNUSUAL CONDITIONS
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a. 0°C (32°F) to -35°C (-30°F). Precautions should be taken to allow for the expansion property of water
and chemical solutions (water solubles) under freezing conditions. Acids retain their fluid state as lower
temperatures than water, depending upon the percentage inclusion. Insure that there is an approximate 10%
void in all liquid containers.
b. Plastic Containers. Plastic ampules and containers have a slight expansion capability, but may exhibit
leakage due to fractures. Extreme cold may cause brittleness. Be alert for cracks and leakage. Handle components
carefully.
c. Sample Water. Water must be changed from the frozen state to a liquid state in order to mix with reagents
and indicators.
NOTE
For best results, tests should be performed between 20°C (68°F) and 25°C (77°F)
for optimum water chemistry results.
d. Below -35°C (-30°F). This is below the designed lower operating limit of the incubator. (Water testing
kit-Bacteriological).
2-30.
OPERATING ABOVE 25°C (77°F) TEMPERATURE.
a. WQAS. Water chemistry is not at optimum testing conditions. Higher temperatures result in progressively
more saturated solutions. Temperature serves as a catalyst in most reactions. Indicator solutions usually react
faster.
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