MIL-STD-202H.pdf - 第48页

MI L - S TD - 202 - 107 T A B L E III. T her m al s h oc k c on di t i o ns ( l i q ui d) . Test conditi on N um ber of c y c l e s T es t c ondi t i on N um ber o f c y c l e s T es t c ondi t i on N um ber o f c y c l …

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MIL-STD-202-107
TABLE I. Thermal shock test conditions (air) 1/.
Test
condition
Number of
cycles
Test
condition
Number of
cycles
Test
condition
Number of
cycles
Step A 5 B 5 C 5
A-1 25 B-1 25 C-1 25
A-2 50 B-2 50 C-2 50
A-3 100 B-3 100 C-3 100
Temperature Time Temperature Time Temperature Time
1
2
3
4
°C
-55 +0, -3
25 +10, -5
85 +3, -0
25 +10, -5
See table II
5 minutes
maximum
°C
-65 +0, -5
25 +10, -5
125 +3, -0
25 +10, -5
See table II
5 minutes
maximum
°C
-65 +0, -5
25 +10, -5
200 +5, -0
25 +10, -5
See table II
5 minutes
maximum
Test
condition
Number of
cycles
Test
condition
Number of
cycles
Test
condition
Number of
cycles
Step D 5 E 5 F 5
D-1 25 E-1 25 F-1 25
D-2 50 E-2 50 F-2 50
D-3 100 E-3 100 F-3 100
Temperature Time Temperature Time Temperature Time
1
2
3
4
°C
-65 +0, -5
25 +10, -5
350 +5, -0
25 +10, -5
See table II
5 minutes
maximum
°C
-65 +0, -5
25 +10, -5
500 +5, -0
25 +10, -5
See table II
5 minutes
maximum
°C
-65 +0, -5
25 +10, -5
150 +3, -0
25 +10, -5
See table II
5 minutes
maximum
1/ When method 102, condition A, B or D has been specified use condition A.
When method 102, condition C has been specified use condition B
TABLE II. Exposure time in air at temperature extremes.
Weight of specimen
Minimum time
(for steps 1 and 3)
1 ounce (28 grams and below)
Above 1 ounce (28 grams) to .3 pound (136 grams), inclusive
Above .3 pounds (136 grams) to 3 pounds (1.36 kilograms), inclusive
Above 3 pounds (1.36 kilograms) to 30 pounds (13.6 kilograms), inclusive
Above 30 pounds (13.6 kilograms) to 300 pounds (136 kilograms), inclusive
Above 300 pounds (136 kilograms)
Hours
1/4 (or as specified)
½
1
2
4
8
3
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MIL-STD-202-107
TABLE III. Thermal shock conditions (liquid).
Test
condition
Number
of cycles
Test
condition
Number
of cycles
Test
condition
Number
of cycles
Test
condition
Number
of cycles
Step AA 5 BB 5 CC 5 DD 5
AA-1 15 BB-1 15 CC-1 15 DD-1 15
AA-2 25 BB-2 25 CC-2 25 DD-2 25
Temperature Time Temperature Time Temperature Time Temperature Time
1
2
°C
-0 +2, -10
100 +10, -2
See
table V
°C
-65 +0, -10
125 +10, -0
See
table V
°C
-65 +0, -10
150 +10, -0
See
table V
°C
-65 +0, -10
200 +10, -0
See
table V
TABLE IV. Suggested thermal fluids. 1/ 2/
Test
condition
AA, AA-1, AA-2
fluids
BB, BB-1, BB-2
Fluids
CC, CC-1, CC-2
fluids
DD, DD-1, DD-2
fluids
Step 1 FC40 4/ or
Water 3/
FC77 4/ FC77 4/ FC77 4/
D02
D02-TS 6/
D/80
D02
D02-TS 6/
D/80
D02
D02-TS 6/
D/80
D02
D02-TS 6/
D/80
Step 2 FC40 4/
Water 3/
FC70
FC40 4/
FC70
FC40 4/
FC70 4/
UCON-WS 5/
UCON-WS 5/
UCON-WS} 5/
D02
D02-TS 6/
D03
D02
D02-TS 6/
D03
D02
D02-TS 6/
D03
D05
LS/230 6/
LS/215
1/ See 4.2.2.
2/ Ethylene glycol shall not be used as a thermal shock test fluid.
3/ Tap water is indicated as an acceptable fluid for this temperature range. Its suitability chemically shall be
established prior to use. A mixture of water and alcohol may be used to prevent freezing at the low
temperature extreme. The water shall not be allowed to boil at the upper temperature extreme.
4/ FC77, FC70, FC40 are the registered trademark of 3M.
5/ UCON-WS process fluid is the registered trademark of Union Carbide Corporation.
6/ D02, D02-TS, D03, D05, D/80, LS/215 and LS/230 are the registered trademark of Ausimont (Division of
Montedison).
4
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MIL-STD-202-107
TABLE V. Exposure time in liquid at temperature extremes.
Weight of specimen Minimum time
(for steps 1 and 2)
.05 ounce (1.4 grams) and below
Above .05 ounce (1.4 grams) to .5 ounce (14 grams)
Above .5 ounce (14 grams) to 5 ounces (140 grams)
Minutes
½
2
5
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Supersession data. The main body and 38 parts of this revision of MIL-STD-202 replace superseded MIL-STD-
202.
6.2 Cancelled Method. Method 102, Temperature Cycling is cancelled, when specified Method 107 is used.
102 test condition 107 test condition
A, B, and D
C
A
B
Custodians: Preparing activity:
Army - CR DLA – CC
Navy - EC
Air Force - 85 (Project 59GP-2015-011)
DLA - CC
Review activities:
Army - AR, AT, AV, CR4, MI, SM, TE
Navy - AS, OS, SH
Air Force - 19, 99
NSA - NS
NOTE: The activities listed above were interested in this document as of the date of this document. Since
organizations and responsibilities can change, you should verify the currency of the information above using the
ASSIST Online database at https://assist.dla.mil/
5
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