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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
. A( d+ \- g8 K& A9 [4 \& L4 L+ C* eventilation. As the ball pressure test is not considered to be an ageing test such forced gas ventilation; u; `0 @1 }' ^" b' I( Q' \, T
is not required and should not be confused with forced convection.
! u p' k) J2 H8 NFor the purpose of ball pressure testing chambers with or without forced convection may be used,
N, V2 z5 F* P+ l6 n F' eprovided all other requirements are fulfilled.
% n; t" n2 l3 V% ~+ S, vFollowing clause 5.2 of the standard and considering the note there, a separate thermocouple on or* k) }8 p' P- o& A1 Q3 ?
right below the surface of the test specimen support and as close as practical to the test sample shall
, e0 }7 z8 T( ?: W% Bbe used to check that the temperature of the test specimen support does not significantly deviate from4 u9 C7 m2 E! k: d" X) }
the test temperature.
W4 A3 f7 G- s' B! \In addition measure the air temperature as close as possible to the test specimen.
1 u2 k! A K `( p3 PIn case of non-round indentation obtained, report the biggest diameter measurement observed. The" `5 C9 W5 l0 [) g6 d
maximum difference between the longest and shortest measurement should not exceed 0,2 mm.. M) o+ U& g- T: H$ ?9 v" k$ h
Where the product standard contains differing or conflicting requirements to IEC 60695-10-2 or to this
: ?: D/ [3 J8 [4 Ndecision sheet these product standard requirements override the requirements from IEC 60695-10-2/ Y3 A* F# q( E: O( @. V! n
and this decision sheet.
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