|
|
$ u' a- K* t7 R9 i! O
Standard-9 [3 W9 c1 F! ?" [6 ]
IEC 60695-10-2:2003, Ed.2
- X/ [* L6 `; t$ z* U* L0 O7 V/ fSubclause(s):
/ Q: @8 {* a7 \; o$ A) g/ V+ O/ y4
& t5 a" N* S& `' T$ l76 m3 E0 _8 Q, G
9$ j6 W0 |+ \0 J; O3 u5 ] Z8 P
Figure 2
' N5 U: _1 n! C& jNo. Year, M( @2 ^( [& ~0 X) e
DSH
0 ~3 b2 U: ]& B0 [0391C 2010
0 }5 H7 x, ]& eCategory:
4 I; a" o- T. i2 a: ^VARIOUS, GENERAL( Y: D5 p5 D1 J3 m( M" X
Developed by:1 A* q* \% O1 V1 `
CTL-WG2 + WG48 u! x8 D! {' }! v y) R
Subject:
: l# f$ M; w" Q3 ^6 B/ oBall pressure test4 q' k6 E; J9 ]0 C: f& i
Key words:. V% c, M( D/ ]" z
-Diameter of indentation
/ ^9 Z# H! D5 V3 h2 }8 K" [$ N) V; Q-Pressure Ball
$ Y! m7 }# K* l! j. C$ b-Test Specimen Support% ~/ Z$ ]! A; V4 K0 |$ N5 i% r1 S. `
Approved at the 48th CTL
! @ m( Z( E( W ^5 f r1 T BPlenary Meeting, year. s6 t1 f& u" |" P1 }4 ]
2011., o8 a3 C; Y; n# l0 J
Replaces DSH 391 and
8 W4 C) s) q0 H! M" p9 LDSH 391mod.
6 u9 H& c+ ~: w& p( P( U7 _- s9 p+ FQuestion:5 p% w- L; d& k! G
Define the “best practice” test procedure for the ball pressure test based on the+ V, a6 @) N7 W/ P7 a. H: U: ]3 _/ s
requirements of the standard, and for practical reasons also based on 89/1011/CD, which) i: a' k- ~+ y( B3 l0 x1 U* i
is not in all respects identical with the requirements of the standard.
9 l+ }) m: C% \7 M' M/ D( gDecision:
: o, g! t4 m wIn addition to clause 4.1 of the standard and due to various qualities of steel balls for rolling' D! L5 u+ ~3 b9 |; }
bearings, the tolerance for the steel ball diameter shall not exceed ±1% to ensure
6 m7 i$ z$ _$ N- Scomparable results.! \/ R) f+ {, }7 ?
In addition to clause 4.2 of the standard, the specimen support shall be a metal block of
9 j3 r e D0 z2 ^6 @& O2 tsteel, with a diameter 50 mm and a height of 100 mm or equivalent volume and mass.5 m+ [( ^! T: ?6 l: Y# Z
In addition to 4.3 of the standard, a forced air convection single cabinet according to IEC
* _) v. N9 h; x0 {60216-4-1:1990, clauses 4.1.5 and 4.1.6 shall be used.3 x) B7 Y0 h0 t* p$ x
In addition to 7.1 of the standard conduct the test in air, in a heating cabinet being capable to
2 e$ P, E0 ]9 q" K) ^5 G" ~return within 5 min and without any temperature overshoot exceeding +5°C to the
) X; s2 m& a. {8 t) |' cpreviously adjusted and required air temperature within a tolerance of +/- 2°C .9 x( @7 {1 A- A( h' a. r
Measure the air temperature as close as possible to the test specimen.
9 U/ M( C5 A4 [Before introducing the test specimen, bring the cabinet, the test apparatus and the test1 ^: a6 H a4 ]: V% w
specimen support to the required temperature and maintain the required test temperature for
4 V4 L/ u3 z3 |; I24 h or until equilibrium conditions are reached, whichever occurs sooner.
6 o: Y3 h# X! s( \0 r+ Q0 CWhen thermal equilibrium conditions are reached, place the test specimen on the approximate
7 s* N- ]/ v0 Q9 u8 Jcentre of the test specimen support so that its upper surface is horizontal. Gently lower the
! ]0 V2 n+ P, B. `- _pressure ball on to the approximate centre of the test specimen. Ensure that no conditions exist- p* ]0 }9 z, o' ]: M2 F
that will cause the pressure ball to move other than in a downward direction during the test.
8 U1 w; B6 r s3 cAfter the ball pressure apparatus has been applied for 60 +2/-0 minutes, remove it and within 100 U( e3 \; w ?- w4 a, O
s immerse the test specimen in ambient temperature water for 6 min ±2 min.. I8 z, p0 v6 n$ ~4 e1 H
Within 3 minutes of removal from the water, measure the diameter of the indentation caused by! V1 |# \) R1 P) Z
the pressure ball to one decimal place.
1 [. ]& F, P; }, Q' M5 z% b1 O. m' T+ qDeviant from 7.2 of the standard, but in accordance with 89/1011/CD, the diameter “d” of5 \6 d0 @3 N/ |9 j# O8 G Z
the indentation is to be measured as close as possible to the diameter of the “solid edge”9 z& x, S2 t: }
of the indentation according to both a) figure 2a shown below and b) picture examples
2 M9 A# d0 S9 Ngiven in Annex A. The diameter of the solid edge of the indentation (dimension d ) shall1 q" R' ^. i7 g+ u; {6 Q
exclude any material deformation as shown in figure 2c below.
* {+ k, X' u% p. V0 }9 _ W: m$ y Y2 k# ~
* z. Z2 z- V/ ^5 h& R1 L& r) b2 E/ v
2 |' X7 Y. l/ H$ L9 y2 b0 ]3 b) ~/ _
|
本帖子中包含更多资源
您需要 登录 才可以下载或查看，没有账号？注册安规
x
|
1/2 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2012-11-8 21:09
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡
发表于 2017-10-13 16:14
