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6 }5 y2 Y# r/ H& e
: x) x! G& @0 s3 l( x
 DSH 335) m1 w4 [6 h3 f# b. K8 l* X, `
| Temperature Tests& r5 ?1 }$ ]/ \$ J* D
| 9.2! u% x- X9 K# p! [: \2 {/ z( a
| 61010-1(ed.1);am1;am2' F% h3 l6 V2 v+ N; o
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+ U! X6 P" z+ o0 P6 o& KStandard:; M1 T! c! k- N2 s
IEC 61010-1:1990 +A1:1992 + A23 Y2 ]+ s( f# |# V1 [0 Z! p8 z
:1995
1 X" ~9 I& b3 K$ m" E6 S2 PSub clause:
1 W7 _7 S, k7 O6 i9 Z9.2
& U7 g. ~! F) B" J9 QSheet n. 335! o& r7 t& s1 M! O1 M. d
Page 1(1)
, P9 Q) }/ O! P MSubject:
# X V0 q* m7 y5 rTemperature tests
8 N! s9 }$ K* p. r6 IKey words:0 w- O. R9 _! e* n, ~* g
Steady state' y8 E1 S& l7 _( @2 H
Decision n. 23 taken at
' r) [+ O7 l* v2 X37th meeting/2000
8 r: J# y6 L! IQuestion:
, Y! g% A; [' V6 SIn sub-clause, in 1st paragraph, what is meant by “steady state”?
& v. G; @. ^% P3 A+ y* s# QShould this term be defined?. v' U. C6 s* a) H8 ~+ K# s& H
Decision:
( t) z$ N2 e; wSteady state is not defined in IEC61010-1. It has been agreed that where the( {5 r8 i; e) |4 b; s0 J+ }- n5 q
temperature rise is not greater than 2°C in 1 hour then it is reasonable to conclude that
2 y& ?. h. _1 Ssteady state has been achieved. This limit is used in other safety standards for example
+ [ ~3 E5 R$ ?IEC60601-1.
$ y, B( o% ~/ A. p! {Explanatory Notes:3 t) m$ E/ `4 C+ Q- P0 S# ~2 F
A part is regarded as having reached steady state temperature when the temperature rise over
3 E, z" m$ ^2 H$ ^6 ^4 J+ Q; \# Ea3 ]" i, g0 U) z, j5 b+ T' x
long period is almost negligible. The 2°C rise in 1 hour is considered a reasonable limit+ L: V! @3 Z" \+ j' B* X
for this purpose.6 P7 \ _- o9 {) \& B B
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