Combined environments contents · MIL-STD-810H

4 tables appear under this heading.

1. PDF page 740

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 COMBINED ENVIRONMENTS METHOD	2
2.1.1	EFFECTS OF COMBINED TEMPERATURE/HUMIDITY/VIBRATION/ALTITUDE ENVIRONMENTS	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
2.2.2.1	PROCEDURE I – ENGINEERING DEVELOPMENT	3
2.2.2.2	PROCEDURE II - FLIGHT OR MISSION SUPPORT	3
2.2.2.3	PROCEDURE III – PLATFORM ENVELOPE	4
2.2.3	SELECTING COMBINED ENVIRONMENTS	4
2.2.4	ENVIRONMENTAL STRESSES	4
2.2.4.1	THERMAL STRESS	4
2.2.4.1.1	BAY CONDITIONS	5
2.2.4.2	ALTITUDE STRESS	6
2.2.4.3	HUMIDITY STRESS	8
2.2.4.4	ELECTRICAL STRESS	8
2.2.4.4.1	AC & DC SYSTEM NORMAL OPERATION STRESSES	9
2.2.4.4.2	NORMAL ON/OFF CYCLING OF MATERIAL OPERATION	12
2.2.4.5	VIBRATION STRESS	12
2.3	DETERMINE TEST LEVELS AND CONDITIONS	14
2.3.1	TEST CYCLE DEVELOPMENT	14
2.4	TEST ITEM CONFIGURATION	17
3.	INFORMATION REQUIRED	17
3.1	PRETEST	17
3.2	DURING TEST	17
3.3	POST TEST	17
4.	TEST PROCESS	18
4.1	TEST FACILITY	18
4.1.1	POWER SUPPLIES	18
4.2	CONTROLS	18
4.3	TEST INTERRUPTION	18
4.3.1	INTERRUPTION DUE TO FACILITY MALFUNCTION	18
4.3.2	INTERRUPTION DUE TO TEST ITEM OPERATION FAILURE	18
4.3.3	SCHEDULED INTERRUPTIONS	19
4.4	TEST EXECUTION	19
4.4.1	PREPARATION FOR TEST	19
4.4.1.1	PRELIMINARY STEPS	19
4.4.1.2	PRETEST STANDARD AMBIENT CHECKOUT	19
4.4.2	PROCEDURE I – ENGINEERING DEVELOPMENT	20
4.4.3	PROCEDURE II - FLIGHT OR MISSION SUPPORT	20

4.4.3.1	NON-OPERATION/GROUND SOAK	20
4.4.3.2	START UP/TAXI	20
4.4.3.3	CLIMB TO CRUISE/SURVEILLANCE	21
4.4.3.4	CRUISE/SURVEILLANCE	21
4.4.3.5	ATTACK	22
4.4.3.6	DESCENT/LANDING	22
4.4.3.7	MAINTENANCE	23
4.4.4	PROCEDURE III - PLATFORM ENVELOPE	25
4.4.4.1	PROCEDURE III - STEPS	33
5.	ANALYSIS OF RESULTS	37
5.1	Analysis of Test Results	37
5.2	Analysis of Failures	37
6.	REFERENCE/RELATED DOCUMENTS	37
6.1	REFERENCED DOCUMENTS	37
6.2	RELATED DOCUMENTS	38

FIGURE 520.5-1.	TEST PROFILE GENERATION FLOW DIAGRAM	16
FIGURE 520.5-2.	PROCEDURE II- PROFILE NOTIONAL EXAMPLE	24
FIGURE 520.5-3A.	PROCEDURE III- PLATFORM ENVELOPE OPTION 1EXAMPLE	31
FIGURE 520.5-3B	PROCEDURE III-PLATFORM ENVELOPE OPTION 2 EXAMPLE	32
FIGURE 520.5A-1.	SCHEMATIC MISSION PROFILE, ALTITUDE, AND MACH NUMBER	A-1

TABLE 520.5-I.	TYPICAL SUPPLEMENTAL COOLING AIR PARAMETERS, F-15 PLATFORM LCEP EXAMPLE.	6
TABLE 520.5-II.	PRESSURE VS ALTITUDE CONVERSION EQUATIONS	7
TABLE 520.5-III.	INPUT VOLTAGE AND FREQUENCY TEST SCHEDULE	9
TABLE 520.5-IV.	AIRCRAFT ELECTRICAL POWER CHARACTERISTICS	10
TABLE 520.5-V	GROUND VEHICLE 28 VDC CHARACTERISTICS	11
TABLE 520.5-VI.	RTCA DO-160 POWER CHARACTERISTICS	11
TABLE 520.5-VII.	DEFAULT FUNCTIONAL VIBRATION TEST CRITERIA	13
TABLE 520.5-VIII.	TEST PARAMETER SELECTION/PROFILE DEVELOPMENT	15
TABLE 520.5-IX.	PROCEDURE I AND III - TEST CYCLE TEMPLATE.	26
TABLE 520.5A-I.	AMBIENT OUTSIDE AIR TEMPERATURES (HOT ATMOSPHERE MODEL)	A-2
TABLE 520.5A-II.	AMBIENT OUTSIDE AIR TEMPERATURES (COLD ATMOSPHERE MODEL)	A-2
TABLE 520.5A -II.	AMBIENT OUTSIDE AIR TEMPERATURES (WARM MOIST ATMOSPHERE MODEL)	A-3

1. PDF page 740

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 COMBINED ENVIRONMENTS METHOD	2
2.1.1	EFFECTS OF COMBINED TEMPERATURE/HUMIDITY/VIBRATION/ALTITUDE ENVIRONMENTS	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
2.2.2.1	PROCEDURE I – ENGINEERING DEVELOPMENT	3
2.2.2.2	PROCEDURE II - FLIGHT OR MISSION SUPPORT	3
2.2.2.3	PROCEDURE III – PLATFORM ENVELOPE	4
2.2.3	SELECTING COMBINED ENVIRONMENTS	4
2.2.4	ENVIRONMENTAL STRESSES	4
2.2.4.1	THERMAL STRESS	4
2.2.4.1.1	BAY CONDITIONS	5
2.2.4.2	ALTITUDE STRESS	6
2.2.4.3	HUMIDITY STRESS	8
2.2.4.4	ELECTRICAL STRESS	8
2.2.4.4.1	AC & DC SYSTEM NORMAL OPERATION STRESSES	9
2.2.4.4.2	NORMAL ON/OFF CYCLING OF MATERIAL OPERATION	12
2.2.4.5	VIBRATION STRESS	12
2.3	DETERMINE TEST LEVELS AND CONDITIONS	14
2.3.1	TEST CYCLE DEVELOPMENT	14
2.4	TEST ITEM CONFIGURATION	17
3.	INFORMATION REQUIRED	17
3.1	PRETEST	17
3.2	DURING TEST	17
3.3	POST TEST	17
4.	TEST PROCESS	18
4.1	TEST FACILITY	18
4.1.1	POWER SUPPLIES	18
4.2	CONTROLS	18
4.3	TEST INTERRUPTION	18
4.3.1	INTERRUPTION DUE TO FACILITY MALFUNCTION	18
4.3.2	INTERRUPTION DUE TO TEST ITEM OPERATION FAILURE	18
4.3.3	SCHEDULED INTERRUPTIONS	19
4.4	TEST EXECUTION	19
4.4.1	PREPARATION FOR TEST	19
4.4.1.1	PRELIMINARY STEPS	19
4.4.1.2	PRETEST STANDARD AMBIENT CHECKOUT	19
4.4.2	PROCEDURE I – ENGINEERING DEVELOPMENT	20
4.4.3	PROCEDURE II - FLIGHT OR MISSION SUPPORT	20

2. PDF page 741

4.4.3.1	NON-OPERATION/GROUND SOAK	20
4.4.3.2	START UP/TAXI	20
4.4.3.3	CLIMB TO CRUISE/SURVEILLANCE	21
4.4.3.4	CRUISE/SURVEILLANCE	21
4.4.3.5	ATTACK	22
4.4.3.6	DESCENT/LANDING	22
4.4.3.7	MAINTENANCE	23
4.4.4	PROCEDURE III - PLATFORM ENVELOPE	25
4.4.4.1	PROCEDURE III - STEPS	33
5.	ANALYSIS OF RESULTS	37
5.1	Analysis of Test Results	37
5.2	Analysis of Failures	37
6.	REFERENCE/RELATED DOCUMENTS	37
6.1	REFERENCED DOCUMENTS	37
6.2	RELATED DOCUMENTS	38

3. PDF page 741

FIGURE 520.5-1.	TEST PROFILE GENERATION FLOW DIAGRAM	16
FIGURE 520.5-2.	PROCEDURE II- PROFILE NOTIONAL EXAMPLE	24
FIGURE 520.5-3A.	PROCEDURE III- PLATFORM ENVELOPE OPTION 1EXAMPLE	31
FIGURE 520.5-3B	PROCEDURE III-PLATFORM ENVELOPE OPTION 2 EXAMPLE	32
FIGURE 520.5A-1.	SCHEMATIC MISSION PROFILE, ALTITUDE, AND MACH NUMBER	A-1

4. PDF page 741

TABLE 520.5-I.	TYPICAL SUPPLEMENTAL COOLING AIR PARAMETERS, F-15 PLATFORM LCEP EXAMPLE.	6
TABLE 520.5-II.	PRESSURE VS ALTITUDE CONVERSION EQUATIONS	7
TABLE 520.5-III.	INPUT VOLTAGE AND FREQUENCY TEST SCHEDULE	9
TABLE 520.5-IV.	AIRCRAFT ELECTRICAL POWER CHARACTERISTICS	10
TABLE 520.5-V	GROUND VEHICLE 28 VDC CHARACTERISTICS	11
TABLE 520.5-VI.	RTCA DO-160 POWER CHARACTERISTICS	11
TABLE 520.5-VII.	DEFAULT FUNCTIONAL VIBRATION TEST CRITERIA	13
TABLE 520.5-VIII.	TEST PARAMETER SELECTION/PROFILE DEVELOPMENT	15
TABLE 520.5-IX.	PROCEDURE I AND III - TEST CYCLE TEMPLATE.	26
TABLE 520.5A-I.	AMBIENT OUTSIDE AIR TEMPERATURES (HOT ATMOSPHERE MODEL)	A-2
TABLE 520.5A-II.	AMBIENT OUTSIDE AIR TEMPERATURES (COLD ATMOSPHERE MODEL)	A-2
TABLE 520.5A -II.	AMBIENT OUTSIDE AIR TEMPERATURES (WARM MOIST ATMOSPHERE MODEL)	A-3