| Paragraph | Page | |
|---|---|---|
| 1. | SCOPE | 1 |
| 1.1 | PURPOSE | 1 |
| 1.2 | APPLICATION | 1 |
| 1.3 | LIMITATIONS | 1 |
| 2. | TAILORING GUIDANCE | 2 |
| 2.1 | SELECTING THE RAIN METHOD | 2 |
| 2.1.1 | EFFECTS OF RAIN ENVIRONMENTS | 2 |
| 2.1.1.1 | IN THE ATMOSPHERE | 2 |
| 2.1.1.2 | ON IMPACT | 2 |
| 2.1.1.3 | AFTER DEPOSITION AND/OR PENETRATION | 2 |
| 2.1.2 | SEQUENCE AMONG OTHER METHODS | 2 |
| 2.2 | SELECTING PROCEDURES | 3 |
| 2.2.1 | PROCEDURE SELECTION CONSIDERATIONS | 3 |
| 2.2.2 | DIFFERENCE AMONG PROCEDURES | 3 |
| 2.3 | DETERMINE TEST LEVELS AND CONDITIONS | 3 |
| 2.3.1 | TEST ITEM CONFIGURATION | 3 |
| 2.3.2 | RAINFALL / DRIP RATE | 4 |
| 2.3.3 | DROPLET SIZE | 4 |
| 2.3.4 | WIND VELOCITY | 4 |
| 2.3.5 | TEST ITEM EXPOSURE SURFACE (ORIENTATION) | 5 |
| 2.3.6 | WATER PRESSURE | 5 |
| 2.3.7 | PREHEAT TEMPERATURE | 5 |
| 2.3.8 | EXPOSURE DURATION | 5 |
| 3. | INFORMATION REQUIRED | 5 |
| 3.1 | PRETEST | 5 |
| 3.2 | DURING TEST | 5 |
| 3.3 | POST-TEST | 6 |
| 4. | TEST PROCESS | 6 |
| 4.1 | TEST FACILITY | 6 |
| 4.1.1 | PROCEDURE I - RAIN AND BLOWING RAIN | 6 |
| 4.1.2 | PROCEDURE II - EXAGGERATED | 7 |
| 4.1.3 | PROCEDURE III - DRIP | 8 |
| 4.2 | CONTROLS | 9 |
| 4.3 | TEST INTERRUPTION | 10 |
| 4.3.1 | INTERRUPTION DUE TO CHAMBER MALFUNCTION | 10 |
| 4.3.2 | INTERRUPTION DUE TO TEST ITEM OPERATION FAILURE | 10 |
| 4.4 | TEST EXECUTION | 10 |
| 4.4.1 | PREPARATION FOR TEST | 10 |
| 4.4.1.1 | PRELIMINARY STEPS | 10 |
| 4.4.1.2 | PRETEST STANDARD AMBIENT CHECKOUT | 10 |
| 4.4.2 | PROCEDURE I - RAIN AND BLOWING RAIN | 10 |
| 4.4.3 | PROCEDURE II - EXAGGERATED | 11 |
| 4.4.4 | PROCEDURE III - DRIP | 11 |
MIL-STD-810H
METHOD 506.6
| Paragraph | Page | |
|---|---|---|
| 5. | ANALYSIS OF RESULTS | 11 |
| 5.1 | OPERATIONAL FAILURE | 12 |
| 5.2 | WATER PENETRATION | 12 |
| 6. | REFERENCE/RELATED DOCUMENTS | 12 |
| 6.1 | REFERENCED DOCUMENTS | 12 |
| 6.2 | RELATED DOCUMENTS | 12 |
| FIGURES | ||
| FIGURE 506.6-1 | SAMPLE FACILITY FOR STEADY STATE RAIN OR DRIP TEST | 7 |
| FIGURE 506.6-2 | TYPICAL NOZZLE SETUP FOR EXAGGERATED TEST, PROCEDURE II (NOT INTENDED FOR USE WHEN CONDUCTING PROCEDURE I TESTING) | 8 |
| FIGURE 506.6-3 | DETAILS OF DISPENSER FOR DRIP TEST, PROCEDURE III | 9 |
MIL-STD-810H
METHOD 506.6
METHOD
506.6 RAIN
NOTE: Tailoring is essential. Select methods, procedures and parameter levels based on the tailoring process described in Part One, paragraph 4.2.2, and Annex C. Apply the general guidelines for laboratory test methods described in Part One, paragraph 5 of this standard.