MIL-PRF-39017G
4.8.21.4 Procedure.
a. Place an unbroken sample or samples with a minimum surface area of 50 square inches in a
suitable breaker or flask so that a maximum of 100 ml of boiling distilled or deionized water will
completely cover the sample. Prepare a blank, using a like amount of distilled or deionized water
in the equivalent beaker, and with both sample and blank proceed as follows: Heat the content of
the beaker to 90°C minimum for 5 minutes ±0.5 minutes. Care should be taken in this operation
so that the sample remains unbroken.
b . Place the beakers in a water bath as described in 4.8.21.2.2 at 25°C.
c.
As soon as thermal equilibrium is established, place the dip-type cell in the extract solution,
making certain that the electrodes are completely immersed. Measure the resistance on the
most sensitive scale of the bridge. Move the cell up and down in the solution several times and
repeat the measurement until successive readings are constant. Before each measurement,
rinse the cell thoroughly in distilled or deionized water and gently shake off any water on the
surface.
e. Correct the conductivity of the extract solution for the blank using the following equation:
Cf = {(Cfs -Cis) - (Cfb -Cib)} * (5*V)/(100*I)
Where:
Cf = Conductivity of the sample tested.
Cfs = Final conductivity of the sample being tested.
Cis = Initial conductivity of the sample being tested.
Cfb = Final conductivity of the blank solution.
Cib = Initial conductivity of the blank solution.
V = Actual volume of water used for extraction procedure (ml).
I = Actual surface area of sample tested (in2).
4.8.21.5 Report. The conductivity shall be reported in microsiemens per cm for a sample having a
minimum of 50 square inches surfaces area.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the
contract or order (see 6.2). When packaging of materiel is to be performed by DoD or in-house
contractor personnel, these personnel need to contact the responsible packaging activity to ascertain
packaging requirements. Packaging requirements are maintained by the Inventory Control Point's
packaging activities within the Military Service or Defense Agency, or within the military service's system
commands. Packaging data retrieval is available from the managing Military Department's or Defense
Agency's automated packaging files, CD-ROM products, or by contacting the responsible packaging
activity.
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