3 information required · MIL-STD-810H

3.1 Pretest

The following information is required to conduct sand and dust tests adequately.

a. General. Information listed in Part One, paragraphs 5.7 and 5.9; and Annex A, Task 405 of this Standard.
b. Specific to this Method.
(1) Applicable for both procedures in this Method:
(a) Test temperature(s).
(b) Composition of the dust or sand.
(c) Concentration of the dust or sand.
(d) Operating requirements.

METHOD 510.7

(e) Test item orientation (incident angle).
(f) Exposure time per orientation.
(g) Methods of sand or dust removal used in service.
(h) Air velocity.
(i) Procedures for determining the test item’s degradation due to abrasion (if required).
(j.) Operational Test Instructions including time period of operation and test item performance (if required).
(k.) Any additional parameters to be measured and recorded, if required. (i.e., Weight, balance, fluid contamination)
(2) Specific to Procedure I (Dust): Relative humidity.
c. Tailoring. Necessary variations in the basic test procedures to accommodate environments identified in the LCEP.

Collect the following information during conduct of the test:

a. General. Information listed in Part One, paragraph 5.10; and in Annex A, Tasks 405 and 406 of this Standard.
b. Specific to this Method.
(1) Applicable for both procedures in this Method.
a. Air velocity calibration of fan settings (if the velocity is not continuously measured and recorded). Any calibrations of feed rates or chamber checkouts required to prove proper application of the applied environment.
b. Pretest photographs of the item and test setup.
c. Photographic documentation prior to and following each change in test item orientation or cleaning.
d. Any deviations from the test plan.
e. Photographic documentation showing the orientation of the test item with respect to the air flow.
f. Documentation of operating and non-operating periods as well as any functional tests conducted.
g. Document when thermal stabilization of the test item was achieved for the purpose of evaluating the duration of high temperature exposure.
(2) Specific to Procedure I (Dust).
a. Relative humidity vs. Time.
b. Dust Concentration vs. Time
c. Wind Speed vs. Time or record of measurements performed to calibrate wind speed just prior to the testing.
(3) Specific to Procedure II (Sand).
a. Sand Concentration vs. Time or record of measurements performed to calibrate sand concentration just prior to the testing.
b. Wind Speed vs. Time or record of measurements performed to calibrate wind speed just prior to the testing.

METHOD 510.7

The following post data shall be included in the test report.

a. General. Information listed in Part One, paragraph 5.13; and in Annex A, Task 406 of this Standard.

b. Specific to this Method.

(1) Applicable for both procedures in this Method.

(a) Initial test item orientation and any orientation change during test.

(b) Values of the test variables for each section of the test (temperature, air velocity, sand or dust concentrations, humidity and duration).

(d) Any deviations from the test plan.

(e) Composition of the dust or sand.

(f) Detailed post test photographs.

(g) Documentation of abrasion areas.

(h) Documentation of any sand or dust intrusions.

(i) Documentation of the cleaning methods performed. Detailed photographs before and after cleaning methods are applied.