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|  DSH 4295 }5 F t( A% c0 C; N
% U& a5 e" _; ^3 R, z2 R
| Thermocouple vs. resistance method
( f8 D+ p* b0 Z- o9 S; y | 42# }! C& F h9 D- ~1 D n
| 60601-1(ed.2);am1;am2
2 o8 `8 r, `5 D4 `8 o. w( \ |
8 ]' G+ I1 K( k* r! n8 d% k: k7 R3 uStandard(s)- (year and edition):
" C! f+ p9 [/ n2 N. S4 RIEC 60601-1:1988 Ed.2 Am1+Am2
4 r: H& V+ [3 G& J/ i& vSub clause(s): 42, Z4 A8 f5 ^+ \% d' r3 N
Sheet n°: DSH-429( @0 c& x9 q( f: Y: r# B7 c
Subject: Thermocouple vs. resistance method3 u8 E" P2 E" H+ o: Q. f, }& F
Key words: Temperature, thermocouple, resistance method, windings3 U& {# P/ @8 e" Z H+ @
Confirmed by CTL at its 39th meeting, in Cologne
* p' X- ~8 ]+ PQuestion:" c% y& y$ {- W7 p# t
Use of thermocouple instead of resistance method? Can the allowable values in Table Xa and: M. ]9 W8 W8 ]4 @. O: J
Table Xb be reduced by 10°C if temperature determined by thermocouples (like IEC 60950( l. [) D7 b m- |6 v$ C
Cl.5.11, Ed. 2)?3 v& T1 g- ]* x4 y8 c/ [
Decision:1 M% d0 X$ j$ D* \! `5 b: V
The allowable maximum temperatures given in Table Xa and Table Xb apply, regardless of the' l- [+ e( H+ I& A! ^& U
test method. However, the systematic errors and uncertainties in any measurement must be) A0 g7 l- c7 w: f! \( _
considered when comparing the measured value to the required value. COR method should3 W! [. F/ v. {+ g$ Q
be utilized whenever possible. If not possible, the allowable limit of Table Xa and Table Xb3 R7 e- g3 r( Y H. H6 Z
must be reduced by 10°C.% }" n/ ~1 F2 B9 O' j5 ]$ t1 G
. r; p% s5 |% Z0 R* a! X
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发表于 2012-11-5 10:29
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