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本帖最后由 chinatown 于 2017-1-6 13:48 编辑
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IEC 60216-4-1 is a standard providing requirements for ovens for aging tests and requires forced gas
7 N1 i. p/ \( }' B. V$ gventilation. As the ball pressure test is not considered to be an ageing test such forced gas ventilation
; `# z K4 S0 ~+ F y! L% P2 Vis not required and should not be confused with forced convection.* H+ f; t) f, j6 _: X& e
For the purpose of ball pressure testing chambers with or without forced convection may be used,$ R$ H+ l5 E4 Y P1 e7 y
provided all other requirements are fulfilled.
0 w6 M) E- i& B$ i$ g1 b( mFollowing clause 5.2 of the standard and considering the note there, a separate thermocouple on or* u/ B" z6 w' U
right below the surface of the test specimen support and as close as practical to the test sample shall
5 P( X. E# y k8 c0 f& Z$ k5 cbe used to check that the temperature of the test specimen support does not significantly deviate from3 I7 E4 R" U2 `' H0 S3 I. {
the test temperature.
( n4 l5 O$ e4 |. Z1 I/ t1 j4 iIn addition measure the air temperature as close as possible to the test specimen.
, i! \+ O/ F6 d) EIn case of non-round indentation obtained, report the biggest diameter measurement observed. The0 Z/ z9 p) d( |( v
maximum difference between the longest and shortest measurement should not exceed 0,2 mm.
) H3 T2 B% r# a* jWhere the product standard contains differing or conflicting requirements to IEC 60695-10-2 or to this
1 _( r4 w- C1 {7 _; J ?decision sheet these product standard requirements override the requirements from IEC 60695-10-20 [- \) |4 [' ?
and this decision sheet.9 K8 v5 ?8 u7 M4 j5 [. s
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