Rain contents · MIL-STD-810H

2 tables appear under this heading.

1. PDF page 191

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

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

1. PDF page 191

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

2. PDF page 192

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