DSH 335 Temperature Tests
http://decisions.iecee.org/icons/ecblank.gifDSH 335
Temperature Tests
9.2
61010-1(ed.1);am1;am2
Standard:
IEC 61010-1:1990 +A1:1992 + A2
:1995
Sub clause:
9.2
Sheet n. 335
Page 1(1)
Subject:
Temperature tests
Key words:
Steady state
Decision n. 23 taken at
37th meeting/2000
Question:
In sub-clause, in 1st paragraph, what is meant by “steady state”?
Should this term be defined?
Decision:
Steady state is not defined in IEC61010-1. It has been agreed that where the
temperature rise is not greater than 2°C in 1 hour then it is reasonable to conclude that
steady state has been achieved. This limit is used in other safety standards for example
IEC60601-1.
Explanatory Notes:
A part is regarded as having reached steady state temperature when the temperature rise over
a
long period is almost negligible. The 2°C rise in 1 hour is considered a reasonable limit
for this purpose.
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