MIL-DTL-5020E
a. Fill a suitable glass container, such as an oil sample bottle, to nearly the top of the
container with compass liquid and place it into a suitable metal bomb having an internal capacity
of approximately one and one half times the external volume of the bottle.
b. Arrange the metal bomb so that it can be tightly closed and charged with oxygen after
the sample is in place. Then charge the bomb with oxygen at 95 to 100 pounds per square inch
pressure at room temperature.
c. Test the metal bomb for leaks. If the test displays no leaks then place the bomb in a
suitable bath maintained at 95 ºC to 100 ºC for 6 hours.
d. Cool the metal bomb in cold water and remove the sample. Subject the sample to the
Saybolt color and oxidation reaction tests in this specification.
e. Examine the sample for the presence of precipitation after the oxygen stability test has
been performed. There shall be no precipitation.
4.4.4 Freezing point and cloudiness. The following test procedures shall be performed.
4.4.4.1 Preparation of barium sulfate turbidity standard. The following test procedures
shall be performed.
a. Pour 25 milliliters (mL) of a 0.00322-molar solution of barium chloride into a 250 mL
volumetric flask. Add 200 mL of distilled water and 25 mL of 0.50 N sulfuric acid.
b. Shake the solution well to ensure complete precipitation and pour it into a 4-ounce
bottle. Stopper the bottle and use the suspension within one-half hour after preparation as the
turbidity standard.
4.4.4.2 Storage of compass liquid for examination. A sample of the compass liquid shall
be placed into a clean 4-ounce sample bottle that has previously been dried in an oven at 100 ºC
for not less than 24 hours. The bottle shall be tightly stoppered and stored at a temperature at or
below -53.9 ºC for 30 minutes.
4.4.4.3 Examination of cloud samples. The following examination procedures shall be
performed.
a. After 30 minutes, remove the sample from storage and shake it vigorously for 10 seconds.
b. Examine the sample to ensure that there is no evidence of gelling, crystallization, or
solidification of the liquid, and that the turbidity of the compass liquid sample is not greater than
that of the standard as specified in 4.4.4.1.
c. Shake the turbidity standard vigorously within five minutes prior to making any
comparisons. If frosting interferes with the turbidity evaluation, the bottle containing the
compass liquid may be quickly dipped into a 50/50 (by volume) mixture of glycerin-methanol,
previously cooled to the storage temperature.
6
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business